Silicon Effects On Properties Of Melt Infiltrated Sic Sic Composites

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Silicon Effects on Properties of Melt Infiltrated Sic/Sic Composites

Author : National Aeronautics and Space Adm Nasa
Publisher : Independently Published
ISBN 13 : 9781724019615
Total Pages : 30 pages
Book Rating : 4.0/5 (196 download)

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Book Synopsis Silicon Effects on Properties of Melt Infiltrated Sic/Sic Composites by : National Aeronautics and Space Adm Nasa

Download or read book Silicon Effects on Properties of Melt Infiltrated Sic/Sic Composites written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-09-25 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Silicon effects on tensile and creep properties, and thermal conductivity of Hi-Nicalon SiC/SiC composites have been investigated. The composites consist of 8 layers of 5HS 2-D woven preforms of BN/SiC coated Hi-Nicalon fiber mats and a silicon matrix, or a mixture of silicon matrix and SiC particles. The Hi-Nicalon SiC/silicon and Hi-Nicalon SiC/SiC composites contained about 24 and 13 vol% silicon, respectively. Results indicate residual silicon up to 24 vol% has no significant effect on creep and thermal conductivity, but does decrease the primary elastic modulus and stress corresponding to deviation from linear stress-strain behavior. Bhatt, Ramakrishna T. and Gyekenyesi, John Z. and Hurst, Janet B. Glenn Research Center NASA/TM-2000-210034, E-12231, NAS 1.15:210034

Silicon Effects on Properties of Melt Infiltrated SiC/SiC Composites

Author : Ramakrishna T. Bhatt
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (317 download)

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Book Synopsis Silicon Effects on Properties of Melt Infiltrated SiC/SiC Composites by : Ramakrishna T. Bhatt

Download or read book Silicon Effects on Properties of Melt Infiltrated SiC/SiC Composites written by Ramakrishna T. Bhatt and published by . This book was released on 2000 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Silicon effects on tensile and creep properties, and thermal conductivity of Hi-Nicalon SiC/SiC composites have been investigated. The composites consist of 8 layers of 5HS 2-D woven preforms of BN/SiC coated Hi-Nicalon fiber mats and a silicon matrix, or a mixture of silicon matrix and SiC particles. The Hi-Nicalon SiC/silicon and Hi-Nicalon SiC/SiC composites contained about 24 and 13 vol% silicon, respectively. Results indicate residual silicon up to 24 vol% has no significant effect on creep and thermal conductivity, but does decrease the primary elastic modulus and stress corresponding to deviation from linear stress-strain behavior.

Handbook of Ceramic Composites

Author : Narottam P. Bansal
Publisher : Springer Science & Business Media
ISBN 13 : 0387239863
Total Pages : 547 pages
Book Rating : 4.3/5 (872 download)

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Book Synopsis Handbook of Ceramic Composites by : Narottam P. Bansal

Download or read book Handbook of Ceramic Composites written by Narottam P. Bansal and published by Springer Science & Business Media. This book was released on 2006-08-25 with total page 547 pages. Available in PDF, EPUB and Kindle. Book excerpt: This valuable handbook has been compiled by internationally renowned researchers in the field. Each chapter is focused on a specific composite system or a class of composites, presenting a detailed description of processing, properties, and applications.

Kinetics, Processing, and Properties of Si/SiC Composites Fabricated by Reactive-melt Infiltration

Author : Hong Zhou
Publisher :
ISBN 13 :
Total Pages : 324 pages
Book Rating : 4.:/5 (489 download)

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Book Synopsis Kinetics, Processing, and Properties of Si/SiC Composites Fabricated by Reactive-melt Infiltration by : Hong Zhou

Download or read book Kinetics, Processing, and Properties of Si/SiC Composites Fabricated by Reactive-melt Infiltration written by Hong Zhou and published by . This book was released on 2001 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: Verified by quantitative analyses using X-ray diffraction and image analysis. The effects of Si content on the mechanical properties as well as creep behavior were studied using four-point bending tests. The elastic modulus and flexural strength were reduced with increasing Si content. The change in elastic modulus with Si content followed the rule of mixtures at room temperature. The elevated-temperature flexural strength decreased significantly when Si content was above 20 vol.%. The creep rate increased with Si content, especially when Si content was above 20 vol.%. Composites containing less than 20 vol.% Si exhibited a significant creep resistance up to 1550ʻC. The stress and temperature thresholds for creep were found for the composites containing more than 20 vol.% Si. Temperature or stress beyond their corresponding threshold value caused a significant acceleration in creep. The creep data were analyzed to identify the creep mechanisms.

Ceramic Matrix Composites

Author : Narottam P. Bansal
Publisher : John Wiley & Sons
ISBN 13 : 1118832892
Total Pages : 725 pages
Book Rating : 4.1/5 (188 download)

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Book Synopsis Ceramic Matrix Composites by : Narottam P. Bansal

Download or read book Ceramic Matrix Composites written by Narottam P. Bansal and published by John Wiley & Sons. This book was released on 2014-10-27 with total page 725 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a comprehensive source of information on various aspects of ceramic matrix composites (CMC). It covers ceramic and carbon fibers; the fiber-matrix interface; processing, properties and industrial applications of various CMC systems; architecture, mechanical behavior at room and elevated temperatures, environmental effects and protective coatings, foreign object damage, modeling, life prediction, integration and joining. Each chapter in the book is written by specialists and internationally renowned researchers in the field. This book will provide state-of-the-art information on different aspects of CMCs. The book will be directed to researchers working in industry, academia, and national laboratories with interest and professional competence on CMCs. The book will also be useful to senior year and graduate students pursuing degrees in ceramic science and engineering, materials science and engineering, aeronautical, mechanical, and civil or aerospace engineering. Presents recent advances, new approaches and discusses new issues in the field, such as foreign object damage, life predictions, multiscale modeling based on probabilistic approaches, etc. Caters to the increasing interest in the application of ceramic matrix composites (CMC) materials in areas as diverse as aerospace, transport, energy, nuclear, and environment. CMCs are considered ans enabling technology for advanced aeropropulsion, space propulsion, space power, aerospace vehicles, space structures, as well as nuclear and chemical industries. Offers detailed descriptions of ceramic and carbon fibers; fiber-matrix interface; processing, properties and industrial applications of various CMC systems; architecture, mechanical behavior at room and elevated temperatures, environmental effects and protective coatings, foreign object damage, modeling, life prediction, integration/joining.

Processing and Properties of SiC/MoSi2-SiC Composites Fabricated by Melt Infiltration

Author : Ramakrishna T. Bhatt
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (317 download)

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Book Synopsis Processing and Properties of SiC/MoSi2-SiC Composites Fabricated by Melt Infiltration by : Ramakrishna T. Bhatt

Download or read book Processing and Properties of SiC/MoSi2-SiC Composites Fabricated by Melt Infiltration written by Ramakrishna T. Bhatt and published by . This book was released on 2000 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hi-Nicalon SiC fiber reinforced MoSi2-SiC matrix composites (SiC/MoSi2-SiC) have been fabricated by the melt infiltration approach. The composite consists of approximately 60 vol%, 2-D woven BN/SiC coated Hi-Nicalon SiC fibers and approximately 40 vol% MoSi2-SiC matrix. The room temperature tensile properties and thermal conductivity of the SiC/MoSi2-SiC composites were measured and compared with those of the melt infiltrated SiC/SiC composites. The influence oi fiber architecture on tensile properties was also evaluated. Results indicate that the primary modulus, stress corresponding to deviation from linearity, and transverse thermal conductivity values for the SiC/MoSi2-SiC composites are significantly lower than those for the SiC/SiC composites. Microcracking of the matrix due to the large difference in thermal expansion between MoSi2 and SiC appears to be the reason for the lower matrix dominated properties of SiC/MoSi2-SiC composites.

Ceramics and Composites Processing Methods

Author : Narottam P. Bansal
Publisher : John Wiley & Sons
ISBN 13 : 1118176650
Total Pages : 598 pages
Book Rating : 4.1/5 (181 download)

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Book Synopsis Ceramics and Composites Processing Methods by : Narottam P. Bansal

Download or read book Ceramics and Composites Processing Methods written by Narottam P. Bansal and published by John Wiley & Sons. This book was released on 2012-03-28 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt: Examines the latest processing and fabrication methods There is increasing interest in the application of advanced ceramic materials in diverse areas such as transportation, energy, environmental protection and remediation, communications, health, and aerospace. This book guides readers through a broad selection of key processing techniques for ceramics and their composites, enabling them to manufacture ceramic products and components with the properties needed for various industrial applications. With chapters contributed by internationally recognized experts in the field of ceramics, the book includes traditional fabrication routes as well as new and emerging approaches in order to meet the increasing demand for more reliable ceramic materials. Ceramics and Composites Processing Methods is divided into three sections: Densification, covering the fundamentals and practice of sintering, pulsed electric current sintering, and viscous phase silicate processing Chemical Methods, examining colloidal methods, sol-gel, gel casting, polymer processing, chemical vapor deposition, chemical vapor infiltration, reactive melt infiltration, and combustion synthesis Physical Methods, including directional solidification, solid free-form fabrication, microwave processing, electrophoretic deposition, and plasma spraying Each chapter focuses on a particular processing method or approach. Collectively, these chapters offer readers comprehensive, state-of-the-science information on the many approaches, techniques, and methods for the processing and fabrication of advanced ceramics and ceramic composites. With its coverage of the latest processing methods, Ceramics and Composites Processing Methods is recommended for researchers and students in ceramics, materials science, structural materials, biomedical engineering, and nanotechnology.

24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A, Volume 21, Issue 3

Author : Todd Jessen
Publisher : John Wiley & Sons
ISBN 13 : 0470295074
Total Pages : 777 pages
Book Rating : 4.4/5 (72 download)

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Book Synopsis 24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A, Volume 21, Issue 3 by : Todd Jessen

Download or read book 24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A, Volume 21, Issue 3 written by Todd Jessen and published by John Wiley & Sons. This book was released on 2009-09-28 with total page 777 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is part of the Ceramic Engineering and Science Proceeding (CESP) series. This series contains a collection of papers dealing with issues in both traditional ceramics (i.e., glass, whitewares, refractories, and porcelain enamel) and advanced ceramics. Topics covered in the area of advanced ceramic include bioceramics, nanomaterials, composites, solid oxide fuel cells, mechanical properties and structural design, advanced ceramic coatings, ceramic armor, porous ceramics, and more.

Ceramic Fibers and Coatings

Author : Committee on Advanced Fibers for High-Temperature Ceramic Composites
Publisher : National Academies Press
ISBN 13 : 0309569036
Total Pages : 112 pages
Book Rating : 4.3/5 (95 download)

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Book Synopsis Ceramic Fibers and Coatings by : Committee on Advanced Fibers for High-Temperature Ceramic Composites

Download or read book Ceramic Fibers and Coatings written by Committee on Advanced Fibers for High-Temperature Ceramic Composites and published by National Academies Press. This book was released on 1998-05-05 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: High-temperature ceramic fibers are the key components of ceramic matrix composites (CMCs). Ceramic fiber properties (strength, temperature and creep resistance, for example)-along with the debonding characteristics of their coatings-determine the properties of CMCs. This report outlines the state of the art in high-temperature ceramic fibers and coatings, assesses fibers and coatings in terms of future needs, and recommends promising avenues of research. CMCs are also discussed in this report to provide a context for discussing high-temperature ceramic fibers and coatings.

Thermal Effects on the Mechanical Properties of SiC Fiber Reinforced Reaction Bonded Silicon Nitride Matrix (SiC/RBSN) Composites

Author : R. T. Bhatt
Publisher :
ISBN 13 :
Total Pages : 20 pages
Book Rating : 4.:/5 (317 download)

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Book Synopsis Thermal Effects on the Mechanical Properties of SiC Fiber Reinforced Reaction Bonded Silicon Nitride Matrix (SiC/RBSN) Composites by : R. T. Bhatt

Download or read book Thermal Effects on the Mechanical Properties of SiC Fiber Reinforced Reaction Bonded Silicon Nitride Matrix (SiC/RBSN) Composites written by R. T. Bhatt and published by . This book was released on 1988 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: The elevated temperature four-point flexural strength and the room temperature tensile and flexural strength properties after thermal shock were measured for ceramic composites consisting of 30 vol % uniaxially aligned 142 microns diameter SiC fibers in a reaction bonded Si3N4 matrix. The elevated temperature strengths were measured after 15 min of exposure in air at temperatures to 1400 C. The thermal shock treatment was accomplished by heating the composite in air for 15 min at temperatures to 1200 C and then quenching in water at 25 C. The results indicate no significant loss in strength properties either at temperature or after thermal shock when compared with the strength data for composites in the as-fabricated condition. (jes).

A Comparative Study of Melt-infiltrated SiC/SiC Fiber-reniforced [sic] Ceramic Matrix Composites

Author : Eric LaDell Kyron Jones
Publisher :
ISBN 13 :
Total Pages : 152 pages
Book Rating : 4.:/5 (515 download)

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Book Synopsis A Comparative Study of Melt-infiltrated SiC/SiC Fiber-reniforced [sic] Ceramic Matrix Composites by : Eric LaDell Kyron Jones

Download or read book A Comparative Study of Melt-infiltrated SiC/SiC Fiber-reniforced [sic] Ceramic Matrix Composites written by Eric LaDell Kyron Jones and published by . This book was released on 2001 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this thesis research is to characterize and compare the mechanical behavior of four SiC/SiC material systems made by the melt infiltration process. All four material systems have a silicon carbide fiber, boron nitride (BN) coating, silicon carbide overcoat, and a silicon carbide matrix. The main differences between the material systems are the size of the SiC overcoat and the way the SiC matrix is mixed. All four material systems were both tensile and fatigue tested at room and elevated (1000C̊) temperatures. The main purpose of the comparison was to determine the material system that will perform best in structural applications under various loading and environmental conditions. Material System IV seems to exhibit the most desired behavior under high temperature fatigue loads. The Si-rich matrix acts as a composite within the composite to distribute the fatigue load evenly throughout the material system. Material System IV also has the lowest combined percentage of void and porosities of 4.65%, which helps the material to better withstand extreme environmental conditions.

Heat Treatment Effects on Microstructure of SiC Fiber Preforms

Author :
Publisher :
ISBN 13 :
Total Pages : 18 pages
Book Rating : 4.:/5 (317 download)

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Book Synopsis Heat Treatment Effects on Microstructure of SiC Fiber Preforms by :

Download or read book Heat Treatment Effects on Microstructure of SiC Fiber Preforms written by and published by . This book was released on 1999 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Preforms of BN/SiC coated Sylramic SiC fibers were heat treated at 1420 deg, 1600 deg, and 1800 deg C in 0.1 MPa argon or at 1800 deg C in 103 MPa nitrogen for 1 h. Optical, SEM, and TEM techniques were used to analyze the effects of environmental exposure on constituent microstructure of the preforms. TEM analysis of the as-received preforms indicates that the CVI BN coating is predominantly amorphous with small amounts of microcrystalline BN grains, and that the SiC coating on top of the BN coating and SiC fibers is polycrystalline. With increasing temperature of exposure from 1420 deg to 1800 deg C, the preforms heat treated in argon showed increasing amounts of crystalline BN in the CVI BN coating, and coarsening of SiC grains in the CVI SiC coating and SiC fibers. On the other hand, the preforms heal treated in 103 MPa nitrogen at 1800 deg C for 1 h showed microstructural changes inside the fiber tows similar to those heat treated at 1800 deg C in 0.1 MPa argon for 1 h, but the same preforms on the outer periphery of the tows showed reaction between nitrogen and the CVI SiC coating to form Si3N4.

Advances in Ceramic Matrix Composites

Author : I M Low
Publisher : Woodhead Publishing
ISBN 13 : 0081021674
Total Pages : 844 pages
Book Rating : 4.0/5 (81 download)

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Book Synopsis Advances in Ceramic Matrix Composites by : I M Low

Download or read book Advances in Ceramic Matrix Composites written by I M Low and published by Woodhead Publishing. This book was released on 2018-01-20 with total page 844 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Ceramic Matrix Composites, Second Edition, delivers an innovative approach to ceramic matrix composites, focusing on the latest advances and materials developments. As advanced ceramics and composite materials are increasingly utilized as components in batteries, fuel cells, sensors, high-temperature electronics, membranes and high-end biomedical devices, and in seals, valves, implants, and high-temperature and wear components, this book explores the substantial progress in new applications. Users will gain knowledge of the latest advances in CMCs, with an update on the role of ceramics in the fabrication of Solid Oxide Fuel Cells for energy generation, and on natural fiber-reinforced eco-friendly geopolymer and cement composites. The specialized information contained in this book will be highly valuable to researchers and graduate students in ceramic science, engineering and ceramic composites technology, and engineers and scientists in the aerospace, energy, building and construction, biomedical and automotive industries. Provides detailed coverage of parts and processing, properties and applications Includes new developments in the field, such as natural fiber-reinforced composites and the use of CMCs in Solid Oxide Fuel Cells (SOFCs) Presents state-of-the-art research, enabling the reader to understand the latest applications for CMCs

Chemical Reaction Engineering

Author : Octave Levenspiel
Publisher : John Wiley & Sons
ISBN 13 : 047125424X
Total Pages : 689 pages
Book Rating : 4.4/5 (712 download)

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Book Synopsis Chemical Reaction Engineering by : Octave Levenspiel

Download or read book Chemical Reaction Engineering written by Octave Levenspiel and published by John Wiley & Sons. This book was released on 1998-09-01 with total page 689 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemical reaction engineering is concerned with the exploitation of chemical reactions on a commercial scale. It's goal is the successful design and operation of chemical reactors. This text emphasizes qualitative arguments, simple design methods, graphical procedures, and frequent comparison of capabilities of the major reactor types. Simple ideas are treated first, and are then extended to the more complex.

High Temperature Ceramic Matrix Composites

Author : R. Naslain
Publisher : Woodhead Publishing Limited
ISBN 13 :
Total Pages : 864 pages
Book Rating : 4.0/5 ( download)

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Book Synopsis High Temperature Ceramic Matrix Composites by : R. Naslain

Download or read book High Temperature Ceramic Matrix Composites written by R. Naslain and published by Woodhead Publishing Limited. This book was released on 1993 with total page 864 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Toughening Mechanisms in Composite Materials

Author : Qing-Hua Qin
Publisher : Elsevier
ISBN 13 : 1782422919
Total Pages : 417 pages
Book Rating : 4.7/5 (824 download)

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Book Synopsis Toughening Mechanisms in Composite Materials by : Qing-Hua Qin

Download or read book Toughening Mechanisms in Composite Materials written by Qing-Hua Qin and published by Elsevier. This book was released on 2015-05-26 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: Toughening Mechanisms in Composite Materials aims to provide a comprehensive and technically detailed coverage of composites and their toughening mechanisms. Unique in its direct and comprehensive approach, the book presents fundamental knowledge on composites’ toughening mechanisms as well as a comprehensive treatment of numerical methods. This volume summarizes the current state-of-the-art and presents the most recent research outcomes in the field. It details the development of each of the techniques, beginning with basic principles, and new concepts are illustrated with examples wherever possible. Covers particle-reinforced composites, fibre-reinforced composites and other toughening mechanisms Analyses toughening mechanisms in a broad range of composite materials Developments in nanotube toughened composites and toughened graphene ceramic composites are examined

Environmental Barrier Coatings

Author : Kang N. Lee
Publisher : MDPI
ISBN 13 : 3039365177
Total Pages : 168 pages
Book Rating : 4.0/5 (393 download)

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Book Synopsis Environmental Barrier Coatings by : Kang N. Lee

Download or read book Environmental Barrier Coatings written by Kang N. Lee and published by MDPI. This book was released on 2020-12-29 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.