Carbon fiber is a strong yet lightweight material made mostly of carbon atoms. It is 5 times stronger than steel but only one-fourth the weight. Carbon fibers are produced from organic polymers like polyacrylonitrile and petroleum pitch through processes involving stabilization, carbonization, and graphitization. The aligned carbon atoms give carbon fiber high strength and stiffness. When combined with resins to form composites, carbon fiber reinforced plastic has applications in aerospace, automotive, sports equipment, civil engineering and more due to its high strength-to-weight ratio. While expensive currently, the market for carbon fiber is projected to grow significantly as costs decrease and new applications are found.
This presentation is about carbon fibre. Carbon fibre is a technical textile product. In this ppt, we have learnt about the history & introduction of carbon fibre and also morphology, properties, chemical structure, crystal structure, manufacturing process, future scope and some end use of carbon fibre.
This presentation is about carbon fibre. Carbon fibre is a technical textile product. In this ppt, we have learnt about the history & introduction of carbon fibre and also morphology, properties, chemical structure, crystal structure, manufacturing process, future scope and some end use of carbon fibre.
الكود العربي السوري - تفاصيل ورسومات انشائية تصميم وتنفيذ شاملة لكافة عناصر ا...Dr.Youssef Hammida
(الكود العربي السوري المرادف الكود الأمريكي – ACI ) مخططات تفاصل ورسومات انشائية شاملة
13 A جميع عناصر
البناء الانشائية خرسانة مسلحة- تصميم + تنفيذ
– مساقط افقية ومقاطع تسليح
– يحتاجها كل مهندس تصميم انشائي وحتى المعماري
FIBER SELECTION
Factors to consider when choosing glass type include thermal properties; fiber cost, type of manufacturing process being used, and forms of reinforcement
A perfect PPT for jute fiber.
No need to edit again on this.
An executed project by own for final year project in B.Tech. and we got 100% result on this.
Try this for your review
Carbon fibers in automotive and aircraft applicationsrohannaik42
Carbon fibers have several advantages including high stiffness, high tensile strength, low weight, high chemical resistance, high temperature tolerance and low thermal expansion. These properties have made carbon fiber very popular in aerospace, civil engineering, military, and motor sports, along with other competition sports.
Polymeric and Hybrid Composite Materials for Aircraft Engine applications / ...Padmanabhan Krishnan
Contents: Introduction to Engines used in Aircrafts,
Materials and Manufacturing,
Basic Mechanics,
Meso and Macro mechanics and Interfaces in Composites,
Tests and failure theories,
Possibilities in Product Design and Development,
Possibilities in Aircraft Engine Applications
it contain some primary information about carbon black and its manufacturing process... not in detail but just overview...
hope you will find it helpful...
Metals, however much we need it or admire it , the drawbacks of it has to be considered.( high density, susceptibility to corrosion,availability etc)
Instead planes of carbon fibre composites can be made without using a tiny scrap of metal, if only we can alter its conductivity issues. that is addressed by a research paper , on the basis of which my ppt is based.
How to Build a Module in Odoo 17 Using the Scaffold MethodCeline George
Odoo provides an option for creating a module by using a single line command. By using this command the user can make a whole structure of a module. It is very easy for a beginner to make a module. There is no need to make each file manually. This slide will show how to create a module using the scaffold method.
বাংলাদেশের অর্থনৈতিক সমীক্ষা ২০২৪ [Bangladesh Economic Review 2024 Bangla.pdf] কম্পিউটার , ট্যাব ও স্মার্ট ফোন ভার্সন সহ সম্পূর্ণ বাংলা ই-বুক বা pdf বই " সুচিপত্র ...বুকমার্ক মেনু 🔖 ও হাইপার লিংক মেনু 📝👆 যুক্ত ..
আমাদের সবার জন্য খুব খুব গুরুত্বপূর্ণ একটি বই ..বিসিএস, ব্যাংক, ইউনিভার্সিটি ভর্তি ও যে কোন প্রতিযোগিতা মূলক পরীক্ষার জন্য এর খুব ইম্পরট্যান্ট একটি বিষয় ...তাছাড়া বাংলাদেশের সাম্প্রতিক যে কোন ডাটা বা তথ্য এই বইতে পাবেন ...
তাই একজন নাগরিক হিসাবে এই তথ্য গুলো আপনার জানা প্রয়োজন ...।
বিসিএস ও ব্যাংক এর লিখিত পরীক্ষা ...+এছাড়া মাধ্যমিক ও উচ্চমাধ্যমিকের স্টুডেন্টদের জন্য অনেক কাজে আসবে ...
Biological screening of herbal drugs: Introduction and Need for
Phyto-Pharmacological Screening, New Strategies for evaluating
Natural Products, In vitro evaluation techniques for Antioxidants, Antimicrobial and Anticancer drugs. In vivo evaluation techniques
for Anti-inflammatory, Antiulcer, Anticancer, Wound healing, Antidiabetic, Hepatoprotective, Cardio protective, Diuretics and
Antifertility, Toxicity studies as per OECD guidelines
This presentation was provided by Steph Pollock of The American Psychological Association’s Journals Program, and Damita Snow, of The American Society of Civil Engineers (ASCE), for the initial session of NISO's 2024 Training Series "DEIA in the Scholarly Landscape." Session One: 'Setting Expectations: a DEIA Primer,' was held June 6, 2024.
MATATAG CURRICULUM: ASSESSING THE READINESS OF ELEM. PUBLIC SCHOOL TEACHERS I...NelTorrente
In this research, it concludes that while the readiness of teachers in Caloocan City to implement the MATATAG Curriculum is generally positive, targeted efforts in professional development, resource distribution, support networks, and comprehensive preparation can address the existing gaps and ensure successful curriculum implementation.
How to Add Chatter in the odoo 17 ERP ModuleCeline George
In Odoo, the chatter is like a chat tool that helps you work together on records. You can leave notes and track things, making it easier to talk with your team and partners. Inside chatter, all communication history, activity, and changes will be displayed.
A Strategic Approach: GenAI in EducationPeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Introduction to AI for Nonprofits with Tapp NetworkTechSoup
Dive into the world of AI! Experts Jon Hill and Tareq Monaur will guide you through AI's role in enhancing nonprofit websites and basic marketing strategies, making it easy to understand and apply.
This slide is special for master students (MIBS & MIFB) in UUM. Also useful for readers who are interested in the topic of contemporary Islamic banking.
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
A review of the growth of the Israel Genealogy Research Association Database Collection for the last 12 months. Our collection is now passed the 3 million mark and still growing. See which archives have contributed the most. See the different types of records we have, and which years have had records added. You can also see what we have for the future.
4. WHAT IS CARBON FIBER?
Carbon fiber (an extremely lightweight fiber )is
defined as a fiber containing at least 92 wt % carbon.
It is a material consisting of several fibers and
composed mostly of carbon atoms. Each fiber is
about 5 – 10 μm thick in diameter. Carbon fiber is
made from organic polymers. Firstly manufactured by
Dr. Roger Bacon in 1950.
5. STRUCTURE
The atomic structure of carbon fiber is similar to graphite (the
sheets are stacked parallel to one another in regular fashion)
consisting of sheets of carbon atoms arranged in a
regular hexagonal pattern.
Fig- 6 μm diameter carbon filament compared to a human hair.
6. The crystal alignment gives the fiber high strength- to-volume ratio.
Carbon Fiber is actually 5 times stronger than steel. It is also 2
times more stiff. Carbon fibers are usually combined with other
materials to form a composite.
Carbon Fiber Reinforced Plastic has a very high strength-to-weight
ratio, and is extremely rigid and brittle. Carbon Fibers are also
composed with other materials, such as with graphite to form
carbon-carbon composites, which have a very high heat tolerance.
7. Manufacturing Challenges
The need for more cost effective recovery and
repair.
Close control required to ensure consistent
quality.
Health and safety issues.
Skin irritation
Breathing irritation.
8. Raw Materials
Polyacrylonitrile (PAN) or
Rayon or
Petroleum pitch
Gases, liquids, and other materials used in the
manufacturing process create specific effects,
qualities, and grades of carbon fiber.
9. The Manufacturing Process of Carbon
Fibers
Polyacrylonitrile (PAN) and pitch are the two most common
raw products used to produce carbon fibers.
In the thermo set treatment, the fibers are stretched and
heated to no more than 400 C. This step cross-links the carbon
chains so that the fibers will not melt in subsequent treatments.
In the carbonize treatment, the fibers are heated to about
800C in an oxygen free environment. This step removes non-
carbon impurities.
The fibers are graphitized; this step stretches the fibers
between 50 to 100% elongation, and heats them to
temperatures ranging from 1100C to 3000C.
The last two treatment steps are surface treatment and epoxy
sizing, are preformed to enhance the carbon fiber / epoxy
bonding strength.
10. Figure: Schematic of PAN and pitch based carbon fiber manufacturing procedure.
.
11. Carbon fiber manufacturing from PAN
The molecular structure of PAN contains highly polar CN groups
and arranged on either side of chain.
The filaments are stretched at an elevated temperature during
the polymer chains are aligned in the filament direction .
The stretched elements are then heated in air at 200C – 300C for
a few hours ,during this stage the CN groups located on the same
side of the original chain combine to form a more stable and rigid
ladder structure and some of the CH2 groups are oxidized .
Next step PAN filaments are carbonized by heating them at a
controlled rate at 1000C -2000C in an inert atmosphere.
Tension is maintained on the filaments to prevent shrinking as
well as to improve molecular orientation.
With the elimination of oxygen and nitrogen atoms ,the filaments
now contain mostly carbon atoms .
12. Carbonized filaments are subsequently heat treated at or above
2000C their structure becomes more ordered and turns toward
graphitic form with increasing heat treatment temperature.
Synthesis of carbon fiber from Polyacrylonitrile(PAN) 1) Polymerization of acrylonitrile to
PAN 2) Cyclization during low temperature process 3) High temperature oxidative
treatment of carbonization (hydrogen is removed) .... after this, process of
graphitization starts where nitrogen is removed and chains are joined into graphite
planes.
13. Carbon fiber manufacturing from PAN
POLYACRYLONITRILE (PAN)
PAN FILAMENT
RELATIVELY LOW MODULUS (BETWEEN 200 & 300 GPa)
HIGH STRENGTH CARBON FIBERS
WITH OUT STRETCHING :RELATIVELY HIGH MODULUS (BETWEEN
500 & 600 GPa )CARBON FIBERS WITH STRETCHING :CARBON
FIBERS WITH IMPROVED STRENGHT
Wet spinning and stretching
Carbonization Heating and stretching at 1000C -2000C in an inert
atmosphere for 30 min
Graphitization
Heating above 2000C with or without stretching
14. Carbon fiber manufacturing from PITCH
Carbon atoms in pitch are arranged in low molecular
weight aromatic ring patterns ,Heating to temperature
above 300C polymerizes these molecule into long , two
dimensional sheet like structures .
Pitch filaments are produced by melt spinning of pitch
which are highly viscous state passing through a
spinneret die , the highly viscous state pitch molecules
become aligned in the filament direction. The filaments
are cooled to freeze the molecular orientation and
subsequently heated between 200C and 300C in an
oxygen containing atmosphere to stabilize them and make
make them infusible.
Next step filaments are carbonized at temperatures
around 2000C.
15. Carbon fiber manufacturing from PITCH
PITCH (ISOTROPIC)
MESOPHASE PITCH (ANISOTROPIC)
RELATIVELY LOW MODULUS (BETWEEN 200 & 300 GPa)
HIGH STRENGTH CARBON FIBERS
WITH OUT STRETCHING :RELATIVELY HIGH MODULUS (BETWEEN 500 &
600 GPa )CARBON FIBERS WITH STRETCHING :CARBON FIBERS WITH
IMPROVED STRENGHT
Heat treatment at 300C-500C
Carbonization
Heating and stretching at 1000C -2000C in an inert atmosphere
for 30 min
Graphitization Heating above 2000C with or without stretching
PITCH FILAMENT
Melt spinning & drawing followed by heat stabilization at 200C-300
16. The Conversion of Rayon fibers into carbon fibers
Stabilization:
• physical desorption of water (25-150C)
• dehydration of the cellulosic (150-240C)
• thermal cleavage of the cyclosidic linkage and scission
of ether bonds and some C-C bonds via free radical
reaction (240-400 C)
• aromatization takes place.
Carbonization:
• carbonaceous residue converted into a graphite-like
layer (400 -700C)
Graphitization:
• Graphitization (700-2700C) obtain high modulus fiber
through longitudinal orientation of the planes.
18. Physical & Chemical Properties of Carbon fiber
Tenacity 1.8 -2.4 (kn/mm2 )
Density 1.95 gm/cc
Elongation at break 0.5%
Elasticity Not good
Moisture Regain (MR%) : 0%
Resiliency Not good
Ability to protest friction Good
Color Black
Ability to protest Heat Good
Lusture Like silky
Effect of Bleaching Soduim Hypochloride slightly oxidized
carbon fiber.
Effect of Sun light Do not change carbon fiber.
Protection against flame Excellent.
Protection ability against insects Do not harm to carbon fiber.
19. Advantages
It has the greatest compressive strength of all
reinforcing materials.
Long service life.
Low coefficient of thermal expansion.
Its density is much lower than the density of steel.
Exhibit properties better than any other metal.
Insensitive to temperature changes High tensile
strength.
Electrically and thermally conductive. Light weight and
low density.
High abrasion and wear resistance.
25. Future of Carbon Fiber
Energy :Windmill blade, natural gas storage and
transportation, fuel cells.
Automobiles: Currently used just for high performance
vehicles, carbon fiber technology is moving into wider
use.
Construction: Lightweight pre-cast concrete, earthquake
protection, soil erosion barriers
Aircraft: Defense and commercial aircraft. Unmanned
aerial vehicles.
Oil exploration: Deep water drilling platforms, drill pipes.
Carbon nanotubes: Semiconductor materials, spacecraft,
chemical sensors, and other uses.
Automobile hoods, casings and bases for electronic
equipments, EMI and RF shielding, brushes.
26. .Missiles, aircraft brakes, aerospace antenna and
support structure, large telescopes, optical
benches, waveguides for stable high-frequency
(GHz) precision measurement frames.
Audio equipment, loudspeakers for Hi-fi
equipment, pickup arms, robot arms.
Medical applications in prostheses, surgery and
x-ray equipment,tendon/ligament repair.
Textile machinery
27. In 2005, carbon fiber had a $90 million market size. Projections
have the market expanding to $2 billion by 2015. To accomplish
this, costs must be reduced and new applications targeted.
.
28. Manufacturers of carbon fibers
Major manufacturers of carbon fibers
include Hexcel, SGL Carbon, Toho Tenax, Toray
Industries and Zoltek. Manufacturers typically make
different grades of fibers for different applications.
Higher modulus carbon fibers are typically more
expensive
29. Conclusion
It revolutionized the field of light weight
materials. The new substitute for metals.
In short it is the future manufacturing
material.