1. Two main approaches to creating hydrophobic surfaces are fabricating micro/nano-hierarchical surface structures through methods like electrochemical deposition or modifying existing structures with low surface energy chemicals.
2. Dip coating is a continuous process where a substrate is immersed in a solution and withdrawn, depositing a thin, uniform coating. Withdrawal speed controls thickness.
3. Several studies have successfully created superhydrophobic surfaces on stainless steel through methods like dip coating with nanoparticles followed by surface modification or electroless plating to generate micro/nanostructures followed by fluoroalkylsilane treatment.
MONOLITHIC IC PROCESSES A monolithic integrated circuit (IC) is a set of circuitry on a single semiconductor plate or chip rather than built of separate elements as a discrete circuit is.
Bioceramic dental implant coatings (Deposited and converted coatings ).
This presentation discusses the different techniques used to coat dental implants to enhance osseointegration .
MONOLITHIC IC PROCESSES A monolithic integrated circuit (IC) is a set of circuitry on a single semiconductor plate or chip rather than built of separate elements as a discrete circuit is.
Bioceramic dental implant coatings (Deposited and converted coatings ).
This presentation discusses the different techniques used to coat dental implants to enhance osseointegration .
Surface modification techniques in biomedical sector Sum K
Surface modification processes and applications are discussed for biomedical sector. Ti, Co-Cr and various implants are considered. The techniques involved are Micro arc Oxidation, Electron Beam Deposition, Plasma Immersion Ion Implantation, Gas Nitriding and many more for corrosion and wear resistance, biointegration, fatigue resistance.
A brief knowledge about surface treatment, which is a process applied to the surface of a material to make it better in some way, for example by making it more resistant to corrosion or wear. Shot peening is a surface treatment in which small hard pellets are shot against the surface of a metal to make it more resistant to fatigue.
This paper explains the fabrication of thin film using modified Physical Vapor Deposition (PVD) Module. Physical Vapor Deposition (PVD) is a variety of vacuum deposition and is a general term used to describe any of a variety of methods to deposit thin films by the condensation of a vaporized form of the material onto various surfaces. The surface morphology of various such as Titanium Dioxide and Aluminum thin film has been studied. The Titanium Dioxide and Aluminum thin film has been fabricated on Silicon (Si) substrate using modified Physical Vapor Deposition (PVD) module system. The process started with the establishment of process flow, process modules, and process parameters. Two modules were developed. The characteristics prior to the thin film fabrication namely surface morphology, metal thickness characterization and V-I characteristic were recorded. The samples were characterized by Optical Microscope, Atomic Force Microscope (AFM),X-ray diffraction (XRD) and I - V characterization. The result and data were analyzed and applied in the fabrication of thin film using various materials. The thin film fabrication process used Titanium Dioxide (TiO2) nanopowder and Aluminum (Al2O3) nanopowder for the coating process. The result for each processes are presented in this paper.
Surface modification techniques in biomedical sector Sum K
Surface modification processes and applications are discussed for biomedical sector. Ti, Co-Cr and various implants are considered. The techniques involved are Micro arc Oxidation, Electron Beam Deposition, Plasma Immersion Ion Implantation, Gas Nitriding and many more for corrosion and wear resistance, biointegration, fatigue resistance.
A brief knowledge about surface treatment, which is a process applied to the surface of a material to make it better in some way, for example by making it more resistant to corrosion or wear. Shot peening is a surface treatment in which small hard pellets are shot against the surface of a metal to make it more resistant to fatigue.
This paper explains the fabrication of thin film using modified Physical Vapor Deposition (PVD) Module. Physical Vapor Deposition (PVD) is a variety of vacuum deposition and is a general term used to describe any of a variety of methods to deposit thin films by the condensation of a vaporized form of the material onto various surfaces. The surface morphology of various such as Titanium Dioxide and Aluminum thin film has been studied. The Titanium Dioxide and Aluminum thin film has been fabricated on Silicon (Si) substrate using modified Physical Vapor Deposition (PVD) module system. The process started with the establishment of process flow, process modules, and process parameters. Two modules were developed. The characteristics prior to the thin film fabrication namely surface morphology, metal thickness characterization and V-I characteristic were recorded. The samples were characterized by Optical Microscope, Atomic Force Microscope (AFM),X-ray diffraction (XRD) and I - V characterization. The result and data were analyzed and applied in the fabrication of thin film using various materials. The thin film fabrication process used Titanium Dioxide (TiO2) nanopowder and Aluminum (Al2O3) nanopowder for the coating process. The result for each processes are presented in this paper.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
For more technical information, visit our website https://intellaparts.com
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
NUMERICAL SIMULATIONS OF HEAT AND MASS TRANSFER IN CONDENSING HEAT EXCHANGERS...ssuser7dcef0
Power plants release a large amount of water vapor into the
atmosphere through the stack. The flue gas can be a potential
source for obtaining much needed cooling water for a power
plant. If a power plant could recover and reuse a portion of this
moisture, it could reduce its total cooling water intake
requirement. One of the most practical way to recover water
from flue gas is to use a condensing heat exchanger. The power
plant could also recover latent heat due to condensation as well
as sensible heat due to lowering the flue gas exit temperature.
Additionally, harmful acids released from the stack can be
reduced in a condensing heat exchanger by acid condensation. reduced in a condensing heat exchanger by acid condensation.
Condensation of vapors in flue gas is a complicated
phenomenon since heat and mass transfer of water vapor and
various acids simultaneously occur in the presence of noncondensable
gases such as nitrogen and oxygen. Design of a
condenser depends on the knowledge and understanding of the
heat and mass transfer processes. A computer program for
numerical simulations of water (H2O) and sulfuric acid (H2SO4)
condensation in a flue gas condensing heat exchanger was
developed using MATLAB. Governing equations based on
mass and energy balances for the system were derived to
predict variables such as flue gas exit temperature, cooling
water outlet temperature, mole fraction and condensation rates
of water and sulfuric acid vapors. The equations were solved
using an iterative solution technique with calculations of heat
and mass transfer coefficients and physical properties.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
2. Two approaches:
1. Creating micro/nano - hierarichical structures for eg: electrochemical deposition, phase
separation, emulsion, electrospinning, immersion, CVD, wet chemical reaction, lithography.
2. Chemical modifying a - hierarichical structures surface with a low surface energy eg. Fatty
Acids, polymers, HCs, FluoroCarbons
3. Dip Coating :
• Production of Nano metric thick coatings
• continuous process in which substrate is immersed into solution of
the material to be deposited at a constant immersion rate, & then it
pulled up.
• Film is deposited on substrate while pulled up.
• Withdrawal & Pulling Speed controls thickness of film.
• Solvent present in solution evaporated & result in coating surface.
4. Dip Coating :
Advantages
• Simultaneous coating of top and bottom part of substrate, no
wastage of material, suitable for all kind of materials, high output,
uniform, highly durable, compact, stable coatings, and easily
repairable.
5. Dip Coating Technique:
• Carried out a simple dipping process for the preparation of super
hydrophobic coatings based on titanium dioxide nanowires dispersed
in tetrahydrofuran (THF) followed by the addition of
polydimethylsiloxane (PDMS).
6. • Hwang et al. (AppliedSurfaceScience, 2014,288:619-624.) obtains
hydrophilic pattern by the method laser machined at aluminum super
hydrophobic surface.
• Contact angle more than 150 °, the roll angle surface less than 10 ° be
called super hydrophobic surface.
• Super hydrophobic surface, owing to having superior repellency
energy, has significant application value in fields such as automatically
cleaning, drag reduction, freezing and oil-water separation.
• At present, the hydrophilic pattern of super hydrophobic surface
realizes mainly through technology such as photoetching, laser
irradiation, Soft lithograph and Cement Composite Treated by Plasma.
7. • invent a kind of micro-pattern processing method of adhesion
controllable hydrophilic, by micro-Milling Process technique, processing
the controlled hydrophilic Wei Keng of adhesion, micro-channel pattern
at Metal Substrate super hydrophobic surface, the method has that cost
is low, simple to operate, control accuracy is high and the advantage such
as the hydrophilic persistency of pattern is good.
8. A kind of micro-pattern processing method of adhesion
controllable hydrophilic, step is as follows:
• Super-hydrophobic sample is fixed on micro-milling machine workbench, ensure
that its super hydrophobic surface is parallel with micro-milling working table
locating surface, note is perpendicular to the Z axis that super hydrophobic
surface direction is XYZ coordinate system of super-hydrophobic sample, the
height rotating main shaft installed on Z axis by controlling system to reduce,
makes rotary milling tools incision super hydrophobic surface and applies X/Y
plane motion according to demand;Wherein, rotating the speed of mainshaft
more than 60r/min, milling cutter diameter is more than 50 μm, and milling
depth is more than 10 μm, it is thus achieved that hydrophilic micro-hole or
micro-raceway groove water droplet is had adhesion or anisotropy adhesion, and
this adhesion has permanent;The adhesion of water droplet is realized
quantitatively regulating and controlling by hydrophilic micro-hole diameter by
hydrophilic micro-hole, hydrophilic micro-raceway groove to the anisotropy
adhesion of water droplet by micro-channel width quantitatively regulating and
controlling.
10. • Wieland Wicoatec (Company)
• The SiO2-based coating forms a very thin separating layer between
the metal surface and the medium flowing through. Thus, wico®pure
ensures clean media on the one hand and protects the metal
substrate from corrosion on the other.
• https://www.youtube.com/watch?v=GTq__iTgSoI
11. • Recently, some achievements on the creation and characterization of
stable super-hydrophobic surfaces on stainless steel have been made [20–
23]. In 2005, Shen et al. coated a uniform TiO2 nano-particle film on the
surface of 316L stainless steel by means of sol–gel and dip-coating
technology, and then used fluoroalkylsiane to fabricate the surface to
enhance the surface hydrophobic property.
• . In 2006, Kim and co-workers reported the room temperature synthesis of
dip coated water repellent silica coatings onto stainless steel substrates
using 1,1,1,3,3,3-hexamethyldisilazane as a surface modify agent.
• Jagannathan et al. developed an atmospheric process based on
compressed CO2 that can create stable clusters of small organic molecules
and these organic clusters can assemble thin film on stainless steel
substrate to create the super-hydrophobic material.
• In 2007, Nema et al. reported a novel approach to grow nano-structured
Teflon-like super-hydrophobic coatings on stainless steel
12. Preparation of super-hydrophobic surface on
stainless steel
we utilize the electroless plating technology to prepare the Nicoated on
stainless steel surface with micro- and nano-meter scale binary
structures, and then modify the resulting surface by virtue of the
lowsurface energy material HFTHTMS to produce our target super-
hydrophobic material. As we know, the electroless plating is a
considerable useful technology that does not need expensive
apparatus and has no requirement for the shape of the substrates. Our
experimental results have proved that the Nicoating stainless steel
surface with micro- and nano-meter scalebinary structures can be
obtained using the electroless plating.Moreover, the Ni-coating is
tightly combined with the substrate. In addition, the Ni-coating can
protect the stainless steel from eroding.
13. Specific process of preparation is as follows. (a)Pretreatment of the
stainless steel substrate: a sheet of stainless steel was sandblasted with
200 um silicon dioxide under the pressure of about 0.4 MPa for 30 s (the
distance between the nozzle and the surface is about 8 cm) and
ultrasonically cleaned in acetone and deionized water, respectively, and
then immersed in 5% HCl solution for 10 min. (b) Process of electroless
plating: the acidized stainless steel was immersed in plating bath solution
(0.1 mol/L NiSO46H2O + 0.25 mol/L N2H4) for 4 h at 80 8C and the pH
value of the plating bath solution was adjusted to 8–10. Finally, the sheet
was immersed in 1 103 M HFTHTMS ethanol solution for 24 h at room
temperature and dried at 120 8C for 2 h in an oven. Here, HFTHTMS
represents (heptadecafluoro-1,1,2,2-tetrahydrodecyl) trimethoxysilane,
and its chemical formula is C13H13F17O3Si.
14. Fabrication of hydrophobic Ti3SiC2 surface with micro-
grooved structures by wire electrical discharge machining
• A commercial WEDM system (Sodick, AP250LS) was used to fabricate micro-grooved
Ti3SiC2 surface.
• Commercially available Ti3SiC2 bulk was firstly cut in 15×15×5mmbar and fixed on the
vertical worktable.
• The brass wire with the diameter of 50 μm was loaded as an anodic electrode and
constantly controlled by wire electrode feeding system to minimize the electrode wear.
• The workpiece was immersed into the dielectric oil (Glysantin G 48–24) during the
machining process. Under the action of micro electrical discharge removal, the micro-
grooved structures were machined by the wire electrode along the setting V-shape
excision path.
• All the experiments were implemented under same electrical discharge parameters.
discharge voltage and inter-electrode gap were set as 70 V and 0.034 mm, respectively.
Afterwards, these machined samples were cleaned ultrasonically by acetone and alcohol
for three times.
15. Analysis work after Wire EDM
• The phase constitutions of Ti3SiC2 surfaces before and after WEDM processing
were analyzed by energy dispersive X-ray spectroscopy (EDS, INCAP FET-X3), X-ray
diffraction (XRD, MiniFlex600, Rigaku), Raman spectrum (HR Evolution, Horiba)
and X-ray photoelectron spectroscopy (XPS, Axis Ultra DLD, Kratos). The surface
topographies were characterized by scanning electron microscope (SEM, Quanta
FEG450, FEI) and 3D laser scanning confocal microscope (VK-250, Keyence).
According to the measured 3D topography and profile, the groove width b,
groove depth h and surface roughness Ra.