fine-diameter microwave-absorbing sic-based fiber

Properties needed for CMC Applications

(2) coating the fibers within the architectural preforms with thin fiber coatings or interphase materials that are required for matrix crack deflection and (3) infiltrating the coated-fiber architectural preforms with SiC-based matrix material which is often performed at temperatures of 1400C and above

US4642271A

A ceramic fiber composite material comprised of boron nitride coated cera fibers embedded in a ceramic matrix The boron nitride coating limits both physical bonding and chemical reaction between the fibers and matrix to improve both strength and toughness of the composite material

US6203904B1

A process for forming a uniform boron nitride coating on a boron-doped refractory carbide body and in particular on a sintered boron-doped silicon carbide fiber where the body is exposed to a nitrogen-containing atmosphere at a temperature equal to or greater than the densification or sintering temperature The coated fibers exhibit no loss in strength properties and show improved creep

Dense Polycrystalline SiC Fiber Derived from Aluminum

Dense Polycrystalline SiC Fiber Derived from Aluminum-doped Polycarbosilane by One-Pot Synthesis Polyaluminocarbosilane SiC fiber Sintering Sintering additive Polyaluminocarbosilane was synthesized by direct reaction of polydimethylsilane with aluminum(III)-acetylacetonate in the presence of zeolite catalyst A fraction of higher molecular weight polycarbosilane was formed due to the binding

Silicon Carbide and Oxycarbide Fibers

Abstract The major deficiency of carbon fibers is their sensitivity to oxidation even at relatively low temperatures Although silicon carbide (SiC) fibers are also sensitive to oxidation their oxidation starts at higher temperatures and yields a protective silica coating

Sic sic thermo

Sic sic thermo We are one of leading company in manufacturing supplying trading distributing and exporting STAINLESS STEEL HIGH NICKEL ALLOYS PIPE Tubes Capillary Tubes FASTENERS BOLT NUTS WASHER FLAT Bar ROUND / SQUARE / HEX BAR WIRE Sheets Plates Coils etc

Progress in polymer

Jun 29 2018During the last 25 years silicon-based preceramic polymers have been developed and investigated as alternatives for the currently used silicon non-oxide ceramic materials (e g SiC Si 3 N 4) The demand for new and functional ceramic composites is increasing rapidly because the modern world strives to improve its living standards and open unforeseen possibilities for economic growth

Silicon carbide fibers with boron nitride coatings

Mar 20 2001A process for forming a uniform boron nitride coating on a boron-doped refractory carbide body and in particular on a sintered boron-doped silicon carbide fiber where the body is exposed to a nitrogen-containing atmosphere at a temperature equal to or greater than the densification or sintering temperature

Preparation of sic

SiC-based fibers after pyrolysis ) The oxygen in SiC-based fibers such as NicalonTM and Tyranno is a result of an oxidative curing step that is used to render the fibers infusible during pyrolytic conversion to SiC There has been considerable interest in recent years in producing SiC-based fibers with improved thermomechanical properties

Preceramic polymer routes to silicon carbide

Fine-diameter microwave-absorbing SiC-based fiber RSC Advances 2017 7 (20) 12126-12132 DOI: 10 1039/C7RA00175D Methods of Fabrication 2016 115-143 DOI: 10 1002/9781119242352 ch7 Preparation of TiO2/SiO2 composite fiber by thermal decomposition of polycarbosilane–tetrabutyl titanate hybrid precursor Journal of Materials

Preceramic polymer routes to silicon carbide

Fine-diameter microwave-absorbing SiC-based fiber RSC Advances 2017 7 (20) 12126-12132 DOI: 10 1039/C7RA00175D Methods of Fabrication 2016 115-143 DOI: 10 1002/9781119242352 ch7 Preparation of TiO2/SiO2 composite fiber by thermal decomposition of polycarbosilane–tetrabutyl titanate hybrid precursor Journal of Materials

Key Engineering Materials Vols 512

Volume is indexed by Thomson Reuters CPCI-S (WoS) This special volume presents the latest advances in the science and technology of high-performance ceramics More than 600 already-excellent contributions were further refined using a strict peer-review process to yield the almost 400 manuscripts included in this collection The result is an incomparable guide to the subject-matter of the

US5792416A

A method of preparing polymer derived silicon fibers comprising the steps of providing a spin dope solution comprising a silicon carbide forming organosilicon polymer preferably polycarbosilane a solvent a soluble boron precursor preferably solid boron hydride and a nitrogen containing precursor preferably polyvinylsilazane spinning the solution to form high strength green fibers and

Full text of Preparation of sic

Full text of Preparation of sic-based fibers from organosilicon polymers : (I) Effects of polyvinylsilazane on the characteristics and processing behavior of polycarbosilane-based solutions and (II) synthesis characterization and processif of polymethylsilanes See other formats

Microwave Absorbing Material

Abstract: Nowadays human are exposed to an environment filling with electromagnetic waves over a wide frequency range The electromagnetic properties of microwave absorbing materials plays an important role in the performance of civilian electromagnetic interference (EMI) shielding at low frequency range and military stealth technology at high frequency one

Microwave Absorbing Material

Abstract: Nowadays human are exposed to an environment filling with electromagnetic waves over a wide frequency range The electromagnetic properties of microwave absorbing materials plays an important role in the performance of civilian electromagnetic interference (EMI) shielding at low frequency range and military stealth technology at high frequency one

Fine

of the SiC-based fiber pyrolysed at 1200 C with a thickness of 3 48 mm is less than 10 dB at the X band (8 2–12 4 GHz) which reveals that the obtained ceramic fiber has the potential to be a microwave-absorbing material This study not only offers a new polymer precursor for new SiC-based fibers but

Microwave Absorbing Material

Abstract: Nowadays human are exposed to an environment filling with electromagnetic waves over a wide frequency range The electromagnetic properties of microwave absorbing materials plays an important role in the performance of civilian electromagnetic interference (EMI) shielding at low frequency range and military stealth technology at high frequency one

Bowei Wang Huimin Li Limin Xu Jiangxi Chen Guomei He * Fine-diameter microwave-absorbing SiC-based fiber RSC Adv 2017 7 12126-12132 2 Guomei He * Jiangxi Chen Haiping Xia Metallafurans and their synthetic chemistry Science Bulletin 2016 61 430-442 3 Qin Zhu Congqing Zhu Zhihong Deng Guomei He * Jun Zhu Jiangxi Chen Haiping

Strength of Materials (Materials Science and Technologies

You can write a book review and share your experiences Other readers will always be interested in your opinion of the books you've read Whether you've loved the book or not if you give your honest and detailed thoughts then people will find new books that are right for them

US4642271A

A ceramic fiber composite material comprised of boron nitride coated cera fibers embedded in a ceramic matrix The boron nitride coating limits both physical bonding and chemical reaction between the fibers and matrix to improve both strength and toughness of the composite material

A review on the joining of SiC for high

Feb 06 2020A review on the joining of SiC is given in response to the interest surge on this material for a number of applications Because the engineering design for the majority of applications requires complicated shapes there has been a strong demand for the development of reliable joining techniques for SiC especially for high-temperature applications

High Performance Silicon Carbide Fiber Hi‐Nicalon for

Michael D Sacks Effect of composition and heat treatment conditions on the tensile strength and creep resistance of SiC-based fibers Journal of the European Ceramic Society 10 1016/S0955-2219(99)00114-4 19 13-14 (2305-2315) (1999)

Ceramic matrix composites : materials modeling and

This book is a comprehensive source of state-of-the-art information on ceramic matrix composites (CMC) It covers ceramic and carbon fibers the fiber-matrix interface processing properties and industrial applications of CMC systems architecture mechanical behavior at room and elevated temperatures environmental effects and protective coatings foreign object damage modeling life

Electromagnetic properties of Si–C–N based ceramics and

Besides the excellent high-temperature mechanical properties Si 3 N 4 and SiC based ceramics containing insulating or electrically conductive phase are attractive for their tunable dielectric properties which may vary from electromagnetic (EM) wave transparent to absorption and shielding Consequently SiC Si 3 N 4 SiON SiBN SiBC SiCN and SiBCN ceramics have attracted extensive interest

Research Progress of High Temperature Microwave Absorption

【Abstract】High temperature microwave absorption material is significantly important to improve the viability of advanced weapon and equipment This paper summarizes the research progress of high temperature microwave absorption materials The current research status of SiC based oxygen-free ceramic materials laminated ternary ceramics (MAX phases) carbon materials and metal oxides

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Bowei Wang Huimin Li Limin Xu Jiangxi Chen Guomei He * Fine-diameter microwave-absorbing SiC-based fiber RSC Adv 2017 7 12126-12132 2 Guomei He * Jiangxi Chen Haiping Xia Metallafurans and their synthetic chemistry Science Bulletin 2016 61 430-442 3 Qin Zhu Congqing Zhu Zhihong Deng Guomei He * Jun Zhu Jiangxi Chen Haiping

Key Engineering Materials Vols 512

Volume is indexed by Thomson Reuters CPCI-S (WoS) This special volume presents the latest advances in the science and technology of high-performance ceramics More than 600 already-excellent contributions were further refined using a strict peer-review process to yield the almost 400 manuscripts included in this collection The result is an incomparable guide to the subject-matter of the

Properties needed for CMC Applications

(2) coating the fibers within the architectural preforms with thin fiber coatings or interphase materials that are required for matrix crack deflection and (3) infiltrating the coated-fiber architectural preforms with SiC-based matrix material which is often performed at temperatures of 1400C and above

Silicon carbide and its composites for nuclear

Dec 01 2019While the history of polymer-derived SiC-based fiber development is briefly reviewed later and an extensive review on the SiC-based fibers is found elsewhere the importance of the initial work of Yajima in developing the process for continuous SiC fiber had an enormous impact on the ceramics community and was arguably the birth of serious RD