This study investigated the implantation of sapphire by zirconium and zirconium plus oxygen ions. Important factors that influence amorphization during ion implantation include temperature, ion mass, energy, and fluence. Rutherford backscattering spectrometry was used to determine the threshold fluence for amorphization in sapphire by zirconium implantation and examine the effect of additional oxygen implantation. Optical absorption and photoluminescence measurements provided information about induced color centers and defects from the ion irradiation.
The document summarizes a study on the corrosion resistance of ZrN coated Ti6Al4V alloy in normal saline solution. Key findings:
1) Uncoated Ti6Al4V alloy showed higher corrosion and elemental leaching than coated samples or 316L stainless steel.
2) ZrN coating via cathodic arc deposition improved corrosion resistance by increasing corrosion potential, decreasing corrosion current density, and reducing elemental leaching of Al.
3) A substrate bias voltage of -200V during deposition resulted in the best coating quality and lowest corrosion rate, out-diffusion of Al, and defect density compared to other bias voltages.
22 ionics mass spectrometry - boldly going where no mass spec has gone before...CPSA-2012_5-Minutes-Fame
IONICS is a mass spectrometry company that has been innovating its triple quadrupole product line. It started with the 3Q Series A in 2010 and has since released two new generations, the 3Q Series 100 and 3Q Series 200, pushing the limits of sensitivity. IONICS' latest product is the 3Q Series 300, which provides even lower detection limits down to femtogram and attogram levels for various compounds. IONICS aims to continue innovating its products and working with industry leaders to advance the field.
The document discusses factors to consider when evaluating the total cost of abrasive blasting, including abrasive cost, equipment cost, labor cost, cleaning rate, disposal cost, and reusability. It then presents a formula for calculating the total cost per square foot of blast cleaning that accounts for the abrasive flow rate, price, disposal cost, number of uses, equipment cost, labor cost, and cleaning rate. Tables are provided comparing the physical properties, chemical composition, and performance of various abrasive materials like sand, garnet, and steel grit.
This document summarizes the development of a sensor based on polyvinylidene fluoride (PVDF). It discusses the objectives to develop the sensor and spin a PVDF filament with a diameter of 200μm. It describes the piezoelectric properties of PVDF and its molecular structure. Rheological tests were conducted to analyze viscosity and dynamic properties of PVDF at different temperatures. Spinning tests produced a filament diameter of 200μm but with variations. Physical tests on the filament showed good elongation and modulus. The development of the PVDF-based sensor was achieved.
This document provides tips for motivating people to become more active by selecting enjoyable physical activities. It suggests choosing a fun activity like jump roping, playing tennis, or roller skating. It also recommends creating a flexible schedule, drinking plenty of water, thinking positively, and getting enough sleep to reap the benefits of exercise like stress relief and better health without overdoing it. The goal is to energize one's life through simple, fun physical activities and spending time with friends.
Momentum is defined and the concepts of impulse, conservation of momentum, explosions, and collisions in one dimension are explained. Conservation of momentum states that the total momentum of two objects in a collision is constant. Explosions are discussed, noting that the vector sums of particles from an explosion will add up to the original object's internal impulse. Collisions are described as either elastic, where no kinetic energy is lost, or inelastic, where some kinetic energy converts to other forms of energy.
The document provides tips for playing shots from the rough, including taking an upright swing to hit less grass before the ball, playing the ball closer to your back foot for more distance with irons, closing the clubface slightly and punching down on the ball, using plenty of right hand but not losing tempo, taking a full swing with a lot of wrist to let the grass slow the swing, playing the ball forward if wanting more height on shots, and adjusting club selection based on the direction the grass is growing around the ball.
Finland – Macedonia Business Seminar, Wednesday, June 6, 2012
The Business Seminar was organized on the occasion of the visit to Finland of H.E. Mr. Nikola Gruevski, Prime Minister, President of the Government of the Republic of Macedonia. Presentation by Vladimir Peshevski.
The document summarizes a study on the corrosion resistance of ZrN coated Ti6Al4V alloy in normal saline solution. Key findings:
1) Uncoated Ti6Al4V alloy showed higher corrosion and elemental leaching than coated samples or 316L stainless steel.
2) ZrN coating via cathodic arc deposition improved corrosion resistance by increasing corrosion potential, decreasing corrosion current density, and reducing elemental leaching of Al.
3) A substrate bias voltage of -200V during deposition resulted in the best coating quality and lowest corrosion rate, out-diffusion of Al, and defect density compared to other bias voltages.
22 ionics mass spectrometry - boldly going where no mass spec has gone before...CPSA-2012_5-Minutes-Fame
IONICS is a mass spectrometry company that has been innovating its triple quadrupole product line. It started with the 3Q Series A in 2010 and has since released two new generations, the 3Q Series 100 and 3Q Series 200, pushing the limits of sensitivity. IONICS' latest product is the 3Q Series 300, which provides even lower detection limits down to femtogram and attogram levels for various compounds. IONICS aims to continue innovating its products and working with industry leaders to advance the field.
The document discusses factors to consider when evaluating the total cost of abrasive blasting, including abrasive cost, equipment cost, labor cost, cleaning rate, disposal cost, and reusability. It then presents a formula for calculating the total cost per square foot of blast cleaning that accounts for the abrasive flow rate, price, disposal cost, number of uses, equipment cost, labor cost, and cleaning rate. Tables are provided comparing the physical properties, chemical composition, and performance of various abrasive materials like sand, garnet, and steel grit.
This document summarizes the development of a sensor based on polyvinylidene fluoride (PVDF). It discusses the objectives to develop the sensor and spin a PVDF filament with a diameter of 200μm. It describes the piezoelectric properties of PVDF and its molecular structure. Rheological tests were conducted to analyze viscosity and dynamic properties of PVDF at different temperatures. Spinning tests produced a filament diameter of 200μm but with variations. Physical tests on the filament showed good elongation and modulus. The development of the PVDF-based sensor was achieved.
This document provides tips for motivating people to become more active by selecting enjoyable physical activities. It suggests choosing a fun activity like jump roping, playing tennis, or roller skating. It also recommends creating a flexible schedule, drinking plenty of water, thinking positively, and getting enough sleep to reap the benefits of exercise like stress relief and better health without overdoing it. The goal is to energize one's life through simple, fun physical activities and spending time with friends.
Momentum is defined and the concepts of impulse, conservation of momentum, explosions, and collisions in one dimension are explained. Conservation of momentum states that the total momentum of two objects in a collision is constant. Explosions are discussed, noting that the vector sums of particles from an explosion will add up to the original object's internal impulse. Collisions are described as either elastic, where no kinetic energy is lost, or inelastic, where some kinetic energy converts to other forms of energy.
The document provides tips for playing shots from the rough, including taking an upright swing to hit less grass before the ball, playing the ball closer to your back foot for more distance with irons, closing the clubface slightly and punching down on the ball, using plenty of right hand but not losing tempo, taking a full swing with a lot of wrist to let the grass slow the swing, playing the ball forward if wanting more height on shots, and adjusting club selection based on the direction the grass is growing around the ball.
Finland – Macedonia Business Seminar, Wednesday, June 6, 2012
The Business Seminar was organized on the occasion of the visit to Finland of H.E. Mr. Nikola Gruevski, Prime Minister, President of the Government of the Republic of Macedonia. Presentation by Vladimir Peshevski.
1. MLCC stands for Multi Layer Ceramic Capacitor, which are widely used in electronic devices with approximately 250 components per mobile phone.
2. MLCCs are classified based on their dielectric properties and temperature range and can have capacitance values currently in the pF to 1μF range but nearing 50μF in the future.
3. Miniaturization of MLCCs is an ongoing technical trend, with common size codes decreasing from 1005 to 0603 and nearing 0402 to increase capacitance in smaller volumes.
EO-1/HYPERION: NEARING TWELVE YEARS OF SUCCESSFUL MISSION SCIENCE OPERATION A...grssieee
1) The EO-1 Hyperion instrument has collected over 65,000 scenes over its 12-year mission to study land and coastal ecosystems using imaging spectroscopy.
2) Studies using Hyperion data have identified spectral indices related to chlorophyll that correlate with carbon flux measurements at different sites, including a Zambian woodland and North Carolina forest sites.
3) Time series of Hyperion data at flux tower sites show seasonal changes in these spectral indices that match patterns in ecosystem carbon uptake and release.
EO-1/HYPERION: NEARING TWELVE YEARS OF SUCCESSFUL MISSION SCIENCE OPERATION A...grssieee
1) The EO-1 Hyperion instrument has collected over 65,000 scenes over its 12-year mission to study land and coastal ecosystems using imaging spectroscopy.
2) Studies using Hyperion data have identified spectral indices related to chlorophyll that correlate with carbon flux measurements at different forest, grassland, and woodland sites globally.
3) Time series of Hyperion data at sites in Zambia, North Carolina, and Kansas show seasonal changes in these spectral indices that match patterns in ecosystem carbon uptake and release measured by flux towers.
EO-1/HYPERION: NEARING TWELVE YEARS OF SUCCESSFUL MISSION SCIENCE OPERATION A...grssieee
EO-1/Hyperion has been collecting hyperspectral imagery for over 12 years, acquiring over 65,000 scenes. Researchers have been using these data to develop and validate algorithms for estimating vegetation properties like fraction of absorbed photosynthetically active radiation (fAPAR) and photochemical reflectance index (PRI). Comparisons of Hyperion data to field measurements at flux tower sites show these algorithms can accurately track vegetation changes over time and relate spectral properties to productivity metrics like light use efficiency and gross ecosystem productivity. This work is helping prototype data products for the upcoming HyspIRI mission.
This document discusses the analysis of oxides using Laser Assisted Atom Probe Tomography. It provides motivation for studying oxides at the atomic scale and describes sample preparation techniques. Results are presented on analyzing thin films of SiO2, MgO, and HfO2. Key findings include being able to analyze oxides depending on layer thickness and sample preparation. The document concludes that further improvements in sample preparation and analysis are needed to fully characterize oxides using this technique.
Dynamic Recrystallization of a Nb bearing Al-Si TRIP steelPello Uranga
This document studies the dynamic recrystallization behavior of a TRIP steel microalloyed with niobium and aluminum when subjected to hot compression tests. It was found that aluminum addition decreases grain boundary energy and increases the driving force for boundary migration, accelerating dynamic recrystallization. Peak strain was related to the Zener-Hollomon parameter and initial grain size. Dynamically recrystallized grain size decreased with increasing strain rate. The kinetics of dynamic recrystallization were characterized for the TRIP steel and compared to other microalloyed steels.
Development Of Non Aqueous Asymmetric Hybrid Supercapacitors Part IiiNakkiran Arulmozhi
The document describes research on developing asymmetric hybrid supercapacitors based on lithium-ion intercalated compounds. Specifically, it discusses synthesizing cathode materials of pure LiCoO2 and LiCo1-xAlxO2 with varying amounts of aluminum doping (x=0, 0.2, 0.4, 0.6). The materials were characterized using techniques like thermal analysis, X-ray diffraction, and Fourier transform infrared spectroscopy. Electrochemical characterization of the materials was also performed through cyclic voltammetry and charge/discharge testing to evaluate their performance in supercapacitors.
Study of Metadynamic Recrystallization Phenomena in Coarse Grained Nb Microal...Pello Uranga
This study examines metadynamic recrystallization in coarse-grained Nb microalloyed austenite steel. There is a transition between static and metadynamic recrystallization between the critical strain εc and transition strain εT = 2.2εc. Below εc only static recrystallization occurs. Between εc and εT both static and metadynamic recrystallization contribute to softening. Above εT only metadynamic recrystallization occurs. A new model was developed that considers the contributions of both static and metadynamic recrystallization between εc and εT. The model predictions matched experimental validations
This document discusses the measurement of yield strength using spherical indentation. It summarizes previous studies on this technique from 1995 to 2004. The document also presents experimental data from indenting an aluminum 6061-T6 sample with a 385 nm radius diamond sphere to determine the material's modulus and yield strength. It finds these values match the literature values for this material. However, it notes that surface roughness prevents accurately determining small stresses and strains with this method.
SPICE MODEL of TPCM8002-H (Standard+BDS Model) in SPICE PARKTsuyoshi Horigome
SPICE MODEL of TPCM8002-H (Standard+BDS) in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
Development Of Non Aqueous Asymmetric Hybrid Supercapacitors Part INakkiran Arulmozhi
This document describes the development of a hybrid supercapacitor combining lithium-ion battery electrodes and carbon-based supercapacitor electrodes. Specifically, it discusses synthesizing lithium manganate and doped lithium manganate compounds as cathode materials, and using carbon nanofoam as the anode material. The hybrid supercapacitor is fabricated and undergoes electrochemical characterization through impedance spectroscopy, cyclic voltammetry, and galvanostatic charge/discharge testing to analyze its performance.
SPICE MODEL of 2SK4108 (Professional+BDP Model) in SPICE PARKTsuyoshi Horigome
This document summarizes the modeling and simulation of a Power MOSFET transistor. It describes the device components and equivalent circuit model. Simulation results are provided for key characteristics like transconductance, output, gate charge, capacitance and switching times. Comparisons to measurement data show good agreement between simulation and real-world device performance.
This document discusses the fabrication and characterization of molybdenum disulfide (MoS2) quantum wells. Thin layers of MoS2 act as quantum wells where electrons and holes are confined in two dimensions. Mechanical cleavage, also known as the Scotch tape method, is used to isolate few and single layers of MoS2. Photoluminescence measurements show that gold quenches the photoluminescence of monolayer MoS2 more strongly than silicon dioxide. This effect is attributed to MoS2's behavior as a quantum well where carriers are confined.
SPICE MODEL of C4D10120A (Professional Model) in SPICE PARKTsuyoshi Horigome
SPICE MODEL of C4D10120A (Professional Model) in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TPCA8008-H (Professional+BDSP Model) in SPICE PARKTsuyoshi Horigome
SPICE MODEL of TPCA8008-H (Professional+BDSP Model) in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
The document contains data and graphs from experiments on chemical reaction kinetics. It includes graphs of concentration vs time for SO2Cl2 undergoing decomposition, showing a decay in concentration over time. It also contains graphs of NO2 concentration vs time from a separate experiment, with the natural log and inverse of concentration plotted against time. The graphs are used to analyze the reactions by determining orders and rate constants from the slopes and intercepts of trendlines.
This document provides specifications for the JS-K1 series power relay. The relay has 1 pole and 8A medium load control. It features a plastic sealed enclosure, various contact material options, and RoHS compliance. The document includes details on part numbering, specifications, coil ratings, safety standards, characteristic data, dimensions, and RoHS/lead free information. It provides concise technical specifications for the relay in a comprehensive product document.
SPICE MODEL of 2SK4002 (Professional+BDP Model) in SPICE PARKTsuyoshi Horigome
SPICE MODEL of 2SK4002 (Professional+BDP Model) in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
Isaf2007 Presentation Bst Ito Funakubo KoutsaroffIvo Koutsaroff
1. The document discusses the effect of strain from the substrate on the tunability of (100) one-axis oriented (Ba0.5Sr0.5)TiO3 thin films.
2. (Ba,Sr)TiO3 films were prepared on substrates with different thermal expansion coefficients to induce varying degrees of tensile and compressive strain. The dielectric properties of the films were then characterized.
3. The results showed that the relative dielectric constant and tunability of the films increased with compressive strain and decreased with tensile strain, consistent with expectations based on thermal strain calculations and previous literature.
1) A wave is a disturbance that transfers energy through a medium without permanent transfer of matter. This document discusses mechanical and electromagnetic waves, their characteristics such as wavelength and frequency, and how waves behave in different media like strings and pipes.
2) Resonance occurs when an object vibrates at its natural frequency, causing large oscillations. Standing waves can form in pipes and strings, with nodes and antinodes depending on boundary conditions and wavelength.
3) The Doppler effect describes the change in frequency heard by an observer due to relative motion between the source and observer. The pitch is higher if approaching and lower if receding due to the change in wavelength reaching the observer each second.
This document discusses the expansion of gases and the relationships between pressure, volume, temperature, and number of moles in gases. It introduces the ideal gas law (PV=nRT) and describes some key gas processes including isobaric (constant pressure), isothermal (constant temperature), and isometric (constant volume) processes. Examples are provided to demonstrate how to use the ideal gas law and gas equations of state to calculate pressure, volume, temperature, or number of moles given values of the other variables.
1. MLCC stands for Multi Layer Ceramic Capacitor, which are widely used in electronic devices with approximately 250 components per mobile phone.
2. MLCCs are classified based on their dielectric properties and temperature range and can have capacitance values currently in the pF to 1μF range but nearing 50μF in the future.
3. Miniaturization of MLCCs is an ongoing technical trend, with common size codes decreasing from 1005 to 0603 and nearing 0402 to increase capacitance in smaller volumes.
EO-1/HYPERION: NEARING TWELVE YEARS OF SUCCESSFUL MISSION SCIENCE OPERATION A...grssieee
1) The EO-1 Hyperion instrument has collected over 65,000 scenes over its 12-year mission to study land and coastal ecosystems using imaging spectroscopy.
2) Studies using Hyperion data have identified spectral indices related to chlorophyll that correlate with carbon flux measurements at different sites, including a Zambian woodland and North Carolina forest sites.
3) Time series of Hyperion data at flux tower sites show seasonal changes in these spectral indices that match patterns in ecosystem carbon uptake and release.
EO-1/HYPERION: NEARING TWELVE YEARS OF SUCCESSFUL MISSION SCIENCE OPERATION A...grssieee
1) The EO-1 Hyperion instrument has collected over 65,000 scenes over its 12-year mission to study land and coastal ecosystems using imaging spectroscopy.
2) Studies using Hyperion data have identified spectral indices related to chlorophyll that correlate with carbon flux measurements at different forest, grassland, and woodland sites globally.
3) Time series of Hyperion data at sites in Zambia, North Carolina, and Kansas show seasonal changes in these spectral indices that match patterns in ecosystem carbon uptake and release measured by flux towers.
EO-1/HYPERION: NEARING TWELVE YEARS OF SUCCESSFUL MISSION SCIENCE OPERATION A...grssieee
EO-1/Hyperion has been collecting hyperspectral imagery for over 12 years, acquiring over 65,000 scenes. Researchers have been using these data to develop and validate algorithms for estimating vegetation properties like fraction of absorbed photosynthetically active radiation (fAPAR) and photochemical reflectance index (PRI). Comparisons of Hyperion data to field measurements at flux tower sites show these algorithms can accurately track vegetation changes over time and relate spectral properties to productivity metrics like light use efficiency and gross ecosystem productivity. This work is helping prototype data products for the upcoming HyspIRI mission.
This document discusses the analysis of oxides using Laser Assisted Atom Probe Tomography. It provides motivation for studying oxides at the atomic scale and describes sample preparation techniques. Results are presented on analyzing thin films of SiO2, MgO, and HfO2. Key findings include being able to analyze oxides depending on layer thickness and sample preparation. The document concludes that further improvements in sample preparation and analysis are needed to fully characterize oxides using this technique.
Dynamic Recrystallization of a Nb bearing Al-Si TRIP steelPello Uranga
This document studies the dynamic recrystallization behavior of a TRIP steel microalloyed with niobium and aluminum when subjected to hot compression tests. It was found that aluminum addition decreases grain boundary energy and increases the driving force for boundary migration, accelerating dynamic recrystallization. Peak strain was related to the Zener-Hollomon parameter and initial grain size. Dynamically recrystallized grain size decreased with increasing strain rate. The kinetics of dynamic recrystallization were characterized for the TRIP steel and compared to other microalloyed steels.
Development Of Non Aqueous Asymmetric Hybrid Supercapacitors Part IiiNakkiran Arulmozhi
The document describes research on developing asymmetric hybrid supercapacitors based on lithium-ion intercalated compounds. Specifically, it discusses synthesizing cathode materials of pure LiCoO2 and LiCo1-xAlxO2 with varying amounts of aluminum doping (x=0, 0.2, 0.4, 0.6). The materials were characterized using techniques like thermal analysis, X-ray diffraction, and Fourier transform infrared spectroscopy. Electrochemical characterization of the materials was also performed through cyclic voltammetry and charge/discharge testing to evaluate their performance in supercapacitors.
Study of Metadynamic Recrystallization Phenomena in Coarse Grained Nb Microal...Pello Uranga
This study examines metadynamic recrystallization in coarse-grained Nb microalloyed austenite steel. There is a transition between static and metadynamic recrystallization between the critical strain εc and transition strain εT = 2.2εc. Below εc only static recrystallization occurs. Between εc and εT both static and metadynamic recrystallization contribute to softening. Above εT only metadynamic recrystallization occurs. A new model was developed that considers the contributions of both static and metadynamic recrystallization between εc and εT. The model predictions matched experimental validations
This document discusses the measurement of yield strength using spherical indentation. It summarizes previous studies on this technique from 1995 to 2004. The document also presents experimental data from indenting an aluminum 6061-T6 sample with a 385 nm radius diamond sphere to determine the material's modulus and yield strength. It finds these values match the literature values for this material. However, it notes that surface roughness prevents accurately determining small stresses and strains with this method.
SPICE MODEL of TPCM8002-H (Standard+BDS Model) in SPICE PARKTsuyoshi Horigome
SPICE MODEL of TPCM8002-H (Standard+BDS) in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
Development Of Non Aqueous Asymmetric Hybrid Supercapacitors Part INakkiran Arulmozhi
This document describes the development of a hybrid supercapacitor combining lithium-ion battery electrodes and carbon-based supercapacitor electrodes. Specifically, it discusses synthesizing lithium manganate and doped lithium manganate compounds as cathode materials, and using carbon nanofoam as the anode material. The hybrid supercapacitor is fabricated and undergoes electrochemical characterization through impedance spectroscopy, cyclic voltammetry, and galvanostatic charge/discharge testing to analyze its performance.
SPICE MODEL of 2SK4108 (Professional+BDP Model) in SPICE PARKTsuyoshi Horigome
This document summarizes the modeling and simulation of a Power MOSFET transistor. It describes the device components and equivalent circuit model. Simulation results are provided for key characteristics like transconductance, output, gate charge, capacitance and switching times. Comparisons to measurement data show good agreement between simulation and real-world device performance.
This document discusses the fabrication and characterization of molybdenum disulfide (MoS2) quantum wells. Thin layers of MoS2 act as quantum wells where electrons and holes are confined in two dimensions. Mechanical cleavage, also known as the Scotch tape method, is used to isolate few and single layers of MoS2. Photoluminescence measurements show that gold quenches the photoluminescence of monolayer MoS2 more strongly than silicon dioxide. This effect is attributed to MoS2's behavior as a quantum well where carriers are confined.
SPICE MODEL of C4D10120A (Professional Model) in SPICE PARKTsuyoshi Horigome
SPICE MODEL of C4D10120A (Professional Model) in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
SPICE MODEL of TPCA8008-H (Professional+BDSP Model) in SPICE PARKTsuyoshi Horigome
SPICE MODEL of TPCA8008-H (Professional+BDSP Model) in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
The document contains data and graphs from experiments on chemical reaction kinetics. It includes graphs of concentration vs time for SO2Cl2 undergoing decomposition, showing a decay in concentration over time. It also contains graphs of NO2 concentration vs time from a separate experiment, with the natural log and inverse of concentration plotted against time. The graphs are used to analyze the reactions by determining orders and rate constants from the slopes and intercepts of trendlines.
This document provides specifications for the JS-K1 series power relay. The relay has 1 pole and 8A medium load control. It features a plastic sealed enclosure, various contact material options, and RoHS compliance. The document includes details on part numbering, specifications, coil ratings, safety standards, characteristic data, dimensions, and RoHS/lead free information. It provides concise technical specifications for the relay in a comprehensive product document.
SPICE MODEL of 2SK4002 (Professional+BDP Model) in SPICE PARKTsuyoshi Horigome
SPICE MODEL of 2SK4002 (Professional+BDP Model) in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
Isaf2007 Presentation Bst Ito Funakubo KoutsaroffIvo Koutsaroff
1. The document discusses the effect of strain from the substrate on the tunability of (100) one-axis oriented (Ba0.5Sr0.5)TiO3 thin films.
2. (Ba,Sr)TiO3 films were prepared on substrates with different thermal expansion coefficients to induce varying degrees of tensile and compressive strain. The dielectric properties of the films were then characterized.
3. The results showed that the relative dielectric constant and tunability of the films increased with compressive strain and decreased with tensile strain, consistent with expectations based on thermal strain calculations and previous literature.
1) A wave is a disturbance that transfers energy through a medium without permanent transfer of matter. This document discusses mechanical and electromagnetic waves, their characteristics such as wavelength and frequency, and how waves behave in different media like strings and pipes.
2) Resonance occurs when an object vibrates at its natural frequency, causing large oscillations. Standing waves can form in pipes and strings, with nodes and antinodes depending on boundary conditions and wavelength.
3) The Doppler effect describes the change in frequency heard by an observer due to relative motion between the source and observer. The pitch is higher if approaching and lower if receding due to the change in wavelength reaching the observer each second.
This document discusses the expansion of gases and the relationships between pressure, volume, temperature, and number of moles in gases. It introduces the ideal gas law (PV=nRT) and describes some key gas processes including isobaric (constant pressure), isothermal (constant temperature), and isometric (constant volume) processes. Examples are provided to demonstrate how to use the ideal gas law and gas equations of state to calculate pressure, volume, temperature, or number of moles given values of the other variables.
The document discusses temperature, heat, and phase changes. It defines temperature as a measure of the average kinetic energy of particles in an object. Temperature scales like Fahrenheit, Celsius, and Kelvin are introduced. Heat is a form of energy that transfers between objects due to temperature differences. Equations are provided to calculate heat transfer during temperature changes and phase changes using values like specific heat and latent heat. Examples demonstrate using the equations to solve heat and temperature problems involving substances like water, ice, and metals.
This document contains examples and solutions related to fluid statics concepts such as pressure, density, buoyancy, and Pascal's principle. It begins with examples calculating the mass, weight, density, and pressure using given values. Later examples apply concepts like buoyancy, pressure at depths, and pressure transmission using hydraulic jacks. Key formulas introduced include pressure (p=F/A), fluid pressure (p=hρg), and buoyancy (B=Vfluidρfluid). Overall, the document provides practice problems and solutions for understanding fundamental fluid statics principles.
1. A mass attached to a linear spring undergoes simple harmonic motion as it moves up and down. Its motion can be described by equations involving displacement, velocity, acceleration, angular frequency, and the spring constant.
2. For a mass-spring system undergoing simple harmonic motion, the maximum displacement from equilibrium occurs at the amplitude. The spring force is greatest and acceleration is largest at the amplitude, while velocity is greatest at mid-displacement and acceleration is zero at the equilibrium position.
3. Examples are worked through to find displacement as a function of time, angular frequency, maximum velocity and acceleration, and displacement at given times for masses undergoing simple harmonic motion on springs or circular paths. Equations are derived from given
This document provides examples and explanations of concepts related to rotational kinetics, including:
- Torque is calculated as the product of a force and its perpendicular distance from the axis of rotation. Net torque is the sum of all torques acting on an object.
- Rotational equilibrium occurs when the net torque on an object is zero, meaning the sum of clockwise and counterclockwise torques are equal.
- The center of mass of a uniformly distributed object is located at its geometric center. For rotational problems involving uniform objects, the center of mass can be treated as the axis of rotation.
- Newton's second law for rotational motion states that the net torque equals the product of the object's moment
This chapter discusses rotational kinematics, including angular displacement (θ), angular velocity (ω), angular acceleration (α), and time (t). Key relationships are developed between these rotational variables and their linear motion counterparts. Examples are provided to demonstrate calculating angular acceleration, angular displacement, angular velocity, tangential acceleration, centripetal acceleration, and tangential and centripetal forces for objects undergoing rotational motion. Homework problems 1 through 5 at the end of the chapter are assigned.
This document discusses work, energy, and power. It defines work as the product of parallel force and distance. Kinetic energy and gravitational potential energy are forms of mechanical energy. The work-kinetic energy theorem states that work done by net force equals change in kinetic energy. The law of conservation of energy says energy cannot be created or destroyed, only converted from one form to another. Power is defined as work done per unit time. Examples calculate work, kinetic energy, potential energy, efficiency, and power for various situations.
This document summarizes key concepts about uniform circular motion including:
- Radians are the SI unit for measuring angles where 1 radian is the central angle that spans an arc equal to the circle's radius.
- Formulas relate angular quantities like speed (ω) and displacement (θ) to linear quantities like speed (v) and arc length (s) using the radius (R).
- Centripetal force (Fc) is required to cause circular motion and is given by Fc = Mv2/R, where M is the object's mass and v is its speed.
- Banked roads allow vehicles to safely take curved portions faster by providing tilt that replaces needed friction with
Force may cause motion or deformation of an object. Newton's second law relates the net force on an object to its acceleration. An example calculates the engine force needed to accelerate a car based on its mass, acceleration, and frictional force. The document provides additional examples applying Newton's laws to calculate accelerations, forces, distances, and times for objects undergoing different motions.
This document summarizes projectile motion in two dimensions. It explains that a projectile's curved motion can be analyzed as the combination of horizontal and vertical linear motion. In the horizontal direction, the motion is at a constant speed due to the lack of acceleration. In the vertical direction, gravity causes acceleration, resulting in parabolic motion. The document provides an example problem of analyzing the motion of a cannon ball fired at an angle, solving for variables like time, distance, and the equation of its parabolic path. It also gives another example of determining how far a ball will land after rolling off a table.
The document provides information about uniformly accelerated motion along a straight line. It defines key terms like velocity, acceleration, displacement and equations of motion. Several examples are presented to demonstrate the use of equations to solve problems involving uniformly accelerated motion. Examples include calculating acceleration, distance traveled, time taken and velocities given information about an object's motion under constant acceleration along a straight path.
This document discusses fundamental units, vectors, and trigonometry. It begins by defining basic units like length, time, and velocity. It then explains that vectors require both a magnitude and direction, while scalars only require a magnitude. The document provides examples of adding vectors graphically using the head-to-tail method and analytically using trigonometric functions. It also discusses solving for unknown sides of triangles using trigonometric functions like sine, cosine, and tangent.
This document discusses the Al2O3-ZrO2 phase diagram through several figures and studies:
1) It presents experimental and calculated Al2O3-ZrO2 phase diagrams showing the different phases like tetragonal ZrO2, monoclinic ZrO2, and liquid present at different temperatures and compositions.
2) Studies found the eutectic composition to be around 42.5% ZrO2 with a eutectic temperature of around 1910°C.
3) One study using solar furnace and electron microprobe analysis examined 17 compositions between 0-100% ZrO2 and identified phase transitions between tetragonal, monoclinic,
1. Electron irradiation of sapphire (Al2O3) results in both electronic and nuclear damage.
2. Electronic damage includes electron excitation and ionization via interactions between the incident 1 MeV electrons and the aluminum and oxygen atoms in Al2O3.
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The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
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1. Implantation of sapphire by Zr and Zr plus O:
threshold fluence for amorphization and optical properties
Younes Sina a, Peter D. Townsend b, Carl J. McHargue a,c, Edvardo Jorge da Costa Alves d
(a) Materials Science and Engineering Department, University of Tennessee, Knoxville, TN 37996
(b) University of Sussex, Brighton, BN1 9QH, United Kingdom
(c) Center for Materials Processing, University of Tennessee, Knoxville, TN 37996-0750
(d) Instituto Tecnológico e Nuclear (ITN) Ion Beam Laboratory, Sacavém, Portugal
2. Background
Important factors for amorphization during ion implantation:
Sample temperature
Ion mass
Ion energy
Fluence
Ionicity degree
Chemical effect
Thermodynamic stability
Topology of the atomic scale structure
Physical properties
Ease of glass formation
3. Background
During ion implantation:
The ions displace atoms from lattice sites
They create vacancy-interstitial pairs and other associated defects
At higher fluences:
Recombination of defects can occur at the same rate as their
production
In other cases:
• Amorphization is the result of damage accumulation during ion
bombardment, especially at low temperatures
4. Background
Zr amorphizes sapphire at relatively low damage.
1.2
Zr
1
0.8 Fe
0.6
Ti
0.4
ΧAl
Nb
0.2
0 Cr
0 50 100 150 200 250 300 350 400
dpa
4
6. I. Sample Preparation
To remove any residual polishing damage or surface contamination
Crystal Systems, Inc. (Salem, MA)
Oxygen
1) 120 h at 1450⁰C
α-Al203
2) slow cool
α-Al203
7. I. Sample Irradiation
7◦-off
RBS
Zr
OA, PL
α-Al203
Zr implanted α-Al203
2x1015 -2x1016
Zr (175 keV, /cm2)
Room Temperature
RBS
O
7◦-off
OA, PL
Zr implanted α-Al203
Zr+ O implanted α-Al203
O (55 keV,1.1x1016 -2.3-x1016 /cm2)
Room Temperature
8. III Characterization
Rutherford backscattering/ Channeling (RBS-C)
Disorder on the Al-sublattice
Distribution of implanted species
Verification of presence (or absence) of an amorphous phase
Zr depth profiling
Optical absorption (OA)
Photoluminescence (PL)
Verification of presence (or absence) of oxygen vacancies
Check for F type color centers
IV Calculation of color centers concentration
Using Smakula’s equation for calculation of F+ F+ centers concentration
8
9. Results and discussion
1) Threshold fluence of amorphization
2) Effect of oxygen implantation on pre-Zr- implanted samples
3) Optical properties of the irradiated samples with Zr and Zr+ O
4) Calculating of true absorption coefficient of the induced bands
5) Concentration of F centres using Smakula’s equation
10. 15 + -2
Sample 2x10 Zr .cm Rutherford backscattering spectrometry along a
3200
2800
<0001> channeling direction (RBS-C) using 2.0 MeV He+
random =4º
2400
O
2000 x10
Yield
1600 Al Fluence below the amorphization threshold
Zr
1200
800
400
0
100 200 300 400 500 600 700
channel
15 + -2
Sample 7.5x10 Zr .cm
2400
<0001>
2000 random =3º
O
1600 x3
Fluence on the verge of amorphization
Yield
1200 Al
Zr
800
400
0
100 200 300 400 500 600 700
channel
12. 15 + 2
7.5 x10 Zr /cm +1.1x10 O /cm
16 + 2
Effect of oxygen in pre-Zr implanted samples
2500
Sample A <0001>
2000 O random
1500
Al Zr (x3)
Low fluence-damaged
Yield
1000
Not amorphous
500
0
100 200 300 400 500 600 700
channel
Oxygen implantation into a pre-Zr- implanted sample
16 + 2 16 + 2
1.5 x10 Zr /cm + 2.3x10 O /cm
2500
Sample IR <0001>
2000 O random
Higher fluence-damaged
1500
Al amorphous
Yield
1000 Zr
500
0
100 200 300 400 500 600 700
channel
13. 1800
1600 2E15 Aligned
1400 7.5E15 Aligned
1200
1.5E16 Zr+/cm2 Aligned
1000
Yield
800
600
400
200
By increasing Zr fluence damage in Al and
0 O- sublattices increase
300 800 Energy [keV] 1300 1800
1800
1600 ---- 1.5E16 Zr+/cm2 & 2.3E16 O+/cm2 Aligned
1400
1200
---- 7.5E15 Zr+/cm@ & 1.1E16 O+/cm2 Aligned
1000
Yield
800
By implantation of O in pre-implanted Zr
600
samples, damage in Al sublattice
400
increases and in O sublattice decreases
200
0
300 800 1300 1800
Energy [keV]
14. Zr distribution 2) Effect of oxygen implantation on pre-Zr- implanted samples
400
7.5E15 Zr+/cm2 Random
b
350 1.5E16 Zr+/cm2 Random
7.5E15 Zr+/cm2 & 1.1E16 O+/cm2 Random
300
1.5E16 Zr+/cm2 & 2.3 E16 O+/cm2 Random
250
Yield
200
a
150
100
50
0
1500 1550 1600 1650 1700 1750 1800
Energy [keV]
Zirconium profiles in sapphire implanted with oxygen subsequent to implantation with
Zr: (a) below and (b) at the threshold for amorphization.
The subsequent implantation of oxygen produces a slight broadening of the zirconium
distribution, probably due to collisional mixing
15. Optical properties of the irradiated samples with Zr and Zr+ O
F+F+
1
1.5E16 Zr+/cm2 & 2.3E16 O+/cm2 , RT
0.9
2E16 Zr+/cm2 , RT
0.8
Intensity [Arbit. Unit]
0.7 1.5E16 Zr+/cm2 ,RT
0.6
F+ 7.5E15 Zr+/cm2 & 1.1E16 O+/cm2 , RT
0.5 2E16 Zr+/cm2 & 4E16 O+/cm2 , RT
0.4
7.5E15 Zr+/cm2 , RT
0.3
0.2
0.1
0
3 4 5 6 7
Energy [eV]
Optical absorption spectra with the absorption from a virgin crystal subtracted
16. Photoluminescence spectra obtained with 4.86 eV confirm that both types of oxygen
vacancies are present in all implanted samples.
20
F+ 1.5E16 Zr+/cm2 & 2.3E16 O+/cm2
18
7.5E15 Zr+/cm2 & 1.1E16 O+/cm2
16 7.5E15 Zr+/cm2
1.5E16 Zr+/cm2
14
VIR
Intensity
12
2E16 Zr+/cm2
10
F
8
6
4
2
0
300 320 340 360 380 nm 400 420 440 460 480
17. Concentration of retained simple oxygen defects (F-type centers) can be estimated by
Smakula’s equation: NF= 0.87 x 1017 n µmax W1/2/f (n2 + 2)2
f is the oscillator strength and for the F band is ~1
n is the refractive index of implanted sapphire ~1.8
W1/2 is width (in eV) at half maximum of the optical absorption band characterized
by a maximum optical density has a value of ~0.6 eV
µm is maximum absorption coefficients of the induced bands
Important parameter in Smakula’s equation is absorption coefficient ( µm)
The absorption coefficient (µ) is given by log (I in/I out) = µt/2.3 where t is the path length
18. Calculated oxygen vacancy profiles produced by Zr and O irradiation in sapphire
1.2
7.5E15 Zr
1 1.1E16 O
Number/(Angstrom-Ion)
0.8
O Vacancies after Zr
0.6
O Vacancies after O
0.4
0.2
0
0 500 1000 1500 2000 2500
Depth [A]
The implant/damage depth, t, is only about 62 nm for the samples implanted with
zirconium only and 68 nm for the dual implants
Number of O vacancies/Cm3 = [Number/Å × Ions].[Ions]. [Å/Cm3]
19. I in I out
-
=
log (I in/ I out) = µt/2.3
The implant/damage depth, t, is only about 62 nm for the samples implanted with
zirconium only and 68 nm for the dual implants
21. Implanted species Oxygen vacancies Oxygen vacancies predicted by
retained as F &F+ defects SRIM
( from Smakula’s equation) (99% dynamically annealed)
Zr 1 - 2.5 % 6 -8 %
Zr + O 0.7 - 1.1 % 4 -5 %
Some of the displaced oxygen may reside in interstitial positions as O2- leaving a
vacancy without a trapped electron(s). This defect has an optical absorption band near
7.0 eV, outside the range of the instrument used here.
At the relatively high fluences used in this study, there is considerable overlapping of the
displacement cascades that may give rise to extended defects such as interstitial
dislocations, nanometer-sized clusters, defects trapped at dislocations, etc.
22. Conclusion
1. Threshold fluence of 175 keV Zr is approximately 1.5×1016
Zr+/cm2.
2. Subsequent implantation of oxygen produces slight
broadening of damage region of low fluence and no
apparent effect at fluence above amorphization threshold.
3. Number of oxygen vacancies retained as F and F+ centers is
very low.
4. Implantation of oxygen in pre implanted samples reduced
the number of F and F+ centers.
23. Thank you
These slides were prepared for an oral presentation for ICDIM 2012 Santa Fe, NM ( June 24-29/2012)