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Author: Christine Droillard
Publisher:
ISBN:
Category :
Languages : en
Pages : 128
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Book Description
DES INTERPHASES COMPOSEES DE COUCHES ALTERNEES DE CARBONE ET DE SIC, VISANT A AMELIORER LES PROPRIETES MECANIQUES DES COMPOSITES SIC/SIC, ONT ETE ELABOREES PAR CVI. L'ANALYSE DE LA STRUCTURE DES COUCHES PUIS DES FISSURES EN MICROSCOPIE ELECTRONIQUE EN TRANSMISSION PERMET DE MIEUX COMPRENDRE LES MECANISMES DE FISSURATION AU SEIN D'UNE INTERPHASE SEQUENCEE. LE COMPORTEMENT MECANIQUE A ETE CARACTERISE GRACE A DES ESSAIS DE TRACTION, EN FONCTION DE CERTAINES PROPRIETES INTERFACIALES (#0, L#S, #S, ...). LES PROPRIETES MECANIQUES ONT ENSUITE ETE EXAMINEES PAR LE CONCEPT DE COURBE R. UNE APPROCHE RELIANT LE TAUX DE RELAXATION D'ENERGIE G A LA TAILLE DE LA PROCESS ZONE EN FOND D'ENTAILLE EST PROPOSEE. G, DETERMINE EN UTILISANT UN SYSTEME EQUIVALENT DE DEUX EPROUVETTES CT EXEMPTES DE PROCESS ZONE, EST DIRECTEMENT EXPRIME EN FONCTION DE LA COMPLAISANCE DU MATERIAU ENDOMMAGE
Author: Christine Droillard
Publisher:
ISBN:
Category :
Languages : en
Pages : 128
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Book Description
DES INTERPHASES COMPOSEES DE COUCHES ALTERNEES DE CARBONE ET DE SIC, VISANT A AMELIORER LES PROPRIETES MECANIQUES DES COMPOSITES SIC/SIC, ONT ETE ELABOREES PAR CVI. L'ANALYSE DE LA STRUCTURE DES COUCHES PUIS DES FISSURES EN MICROSCOPIE ELECTRONIQUE EN TRANSMISSION PERMET DE MIEUX COMPRENDRE LES MECANISMES DE FISSURATION AU SEIN D'UNE INTERPHASE SEQUENCEE. LE COMPORTEMENT MECANIQUE A ETE CARACTERISE GRACE A DES ESSAIS DE TRACTION, EN FONCTION DE CERTAINES PROPRIETES INTERFACIALES (#0, L#S, #S, ...). LES PROPRIETES MECANIQUES ONT ENSUITE ETE EXAMINEES PAR LE CONCEPT DE COURBE R. UNE APPROCHE RELIANT LE TAUX DE RELAXATION D'ENERGIE G A LA TAILLE DE LA PROCESS ZONE EN FOND D'ENTAILLE EST PROPOSEE. G, DETERMINE EN UTILISANT UN SYSTEME EQUIVALENT DE DEUX EPROUVETTES CT EXEMPTES DE PROCESS ZONE, EST DIRECTEMENT EXPRIME EN FONCTION DE LA COMPLAISANCE DU MATERIAU ENDOMMAGE
Author: Sylvain Jacques
Publisher:
ISBN:
Category :
Languages : fr
Pages : 109
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Book Description
DES MATERIAUX C(B) ONT ETE PREPARES PAR LPCVD ET CARACTERISES AU PLAN PHYSICO-CHIMIQUE: L'INFLUENCE DE LA TENEUR EN BORE ADDITIONNE AU CARBONE SUR LES NANO-STRUCTURES A ETE DETERMINEE. L'APTITUDE DE CES MATERIAUX A JOUER LE ROLE D'INTERPHASE A ETE MISE EN EVIDENCE AU SEIN DE COMPOSITES 1D SIC/SIC MODELES (MICROCOMPOSITES): LEUR COMPORTEMENT MECANIQUE A L'AMBIANTE AINSI QUE LEUR RESISTANCE A L'OXYDATION ONT ETE OPTIMISES. UNE INTERPHASE C(B) A GRADIENT DE COMPOSITION A ETE SELECTIONNEE ET MISE EN UVRE PAR CVI DANS UN COMPOSITE 2D SIC/SIC DONT LES PROPRIETES MECANIQUES ET DE DUREE DE VIE SOUS CHARGE A L'AIR EN TEMPERATURE ONT ETE ETUDIEES
Author: Shankar Mall
Publisher: CRC Press
ISBN: 1000725472
Category : Technology & Engineering
Languages : en
Pages : 482
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Book Description
A review and summary of advancements related to mechanical behavior and related mechanics issues of titanium matrix composites (TMCs), a class of high-temperature materials useful in the propulsion and airframe components in advanced aerospace systems. After an introduction to TMCs, different authors review and summarise the advancements related to mechanical behavior and related mechanics issues of TMCs.
Author: Kang N. Lee
Publisher: MDPI
ISBN: 3039365177
Category : Science
Languages : en
Pages : 168
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Book Description
The global increase in air travel will require commercial vehicles to be more efficient than ever before. Advanced engine hot section materials are a key technology required to keep fuel consumption and emission to a minimum in next-generation gas turbines. Ceramic matrix composites (CMCs) are the most promising material to revolutionize gas turbine hot section materials technology because of their excellent high‐temperature properties. Rapid surface recession due to volatilization by water vapor is the Achilles heel of CMCs. Environmental barrier coatings (EBCs) is an enabling technology for CMCs, since it protects CMCs from water vapor. The first CMC component entered into service in 2016 in a commercial engine, and more CMC components are scheduled to follow within the next few years. One of the most difficult challenges to CMC components is EBC durability, because failure of EBC leads to a rapid reduction in CMC component life. Key contributors to EBC failure include recession, oxidation, degradation by calcium‐aluminum‐magnesium silicates (CMAS) deposits, thermal and thermo‐mechanical strains, particle erosion, and foreign object damage (FOD). Novel EBC chemistries, creative EBC designs, and robust processes are required to meet EBC durability challenges. Engine-relevant testing, characterization, and lifing methods need to be developed to improve EBC reliability. The aim of this Special Issue is to present recent advances in EBC technology to address these issues. In particular, topics of interest include but are not limited to the following: • Novel EBC chemistries and designs; • Processing including plasma spray, suspension plasma spray, solution precursor plasma spray, slurry process, PS-PVD, EB-PVD, and CVD; • Testing, characterization, and modeling; • Lifing.
Author: Brian Cantor
Publisher: CRC Press
ISBN: 1420033972
Category : Science
Languages : en
Pages : 432
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Book Description
With contributions from leading experts in their respective fields, Metal and Ceramic Matrix Composites provides a comprehensive overview of topics on specific materials and trends. It is a subject regularly included as a final year option in materials science courses and is also of much industrial and academic interest. The book begins wit
Author: Nicolas Boyard
Publisher: John Wiley & Sons
ISBN: 1848217617
Category : Science
Languages : en
Pages : 464
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Book Description
This book addresses general information, good practices and examples about thermo-physical properties, thermo-kinetic and thermo-mechanical couplings, instrumentation in thermal science, thermal optimization and infrared radiation.
Author: Krishan K. Chawla
Publisher: Springer Science & Business Media
ISBN: 1475729669
Category : Technology & Engineering
Languages : en
Pages : 491
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Book Description
Focusing on the relationship between structure and properties, this is a well-balanced treatment of the mechanics and the materials science of composites, while not neglecting the importance of processing. This updated second edition contains new chapters on fatigue and creep of composites, and describes in detail how the various reinforcements, the materials in which they are embedded, and of the interfaces between them, control the properties of the composite materials at both the micro- and macro-levels. Extensive use is made of micrographs and line drawings, and examples of practical applications in various fields are given throughout the book, together with extensive references to the literature. Intended for use in graduate and upper-division undergraduate courses, this book will also prove a useful reference for practising engineers and researchers in industry and academia.
Author: Yashwant Mahajan
Publisher: Springer
ISBN: 9783030163464
Category : Technology & Engineering
Languages : en
Pages : 1527
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Book Description
This handbook presents an authoritative account of the potential of advanced ceramics and composites in strategic applications, including defense, national security, aerospace, and energy security (especially nuclear energy). It highlights how their unique combination of superior properties such as low density, high strength, high elastic modulus, high hardness, high temperature capability, and excellent chemical and environmental stability are optimized in technologies within these fields. The handbook is organized according to application type. It allows readers to learn about strategies that have been used in different fields and to transfer them to their own. The book addresses a wide variety of ceramics and their composites, including PZT ceramics, carbon nanotubes, aerogels, silica radomes, relaxor ferroelectrics, and many others.
Author: Mohammad Jawaid
Publisher: Springer
ISBN: 3319493825
Category : Technology & Engineering
Languages : en
Pages : 351
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Book Description
This book introduces the concept, design and application of green biocomposites, with a specific focus on the current demand for green biocomposites for automotive and aerospace components. It discusses the mathematical background, innovative approaches to physical modelling, analysis and design techniques. Including numerous illustrations, tables, case studies and exercises, the text summarises current research in the field. It is a valuable reference resource for researchers, students and scientists working in the field of materials science.
Author: International Atomic Energy Agency
Publisher:
ISBN: 9789201253101
Category : Business & Economics
Languages : en
Pages : 639
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Book Description
This publication reports on the results of a coordinated research project on advances in high temperature gas cooled reactor (HTGR) fuel technology and describes the findings of research activities on coated particle developments. These comprise two specific benchmark exercises with the application of HTGR fuel performance and fission product release codes, which helped compare the quality and validity of the computer models against experimental data. The project participants also examined techniques for fuel characterization and advanced quality assessment/quality control. The key exercise included a round-robin experimental study on the measurements of fuel kernel and particle coating properties of recent Korean, South African and US coated particle productions applying the respective qualification measures of each participating Member State. The summary report documents the results and conclusions achieved by the project and underlines the added value to contemporary knowledge on HTGR fuel.
