Download or read book Thermal Modification of Microstructures and Grain Boundaries in Silicon Carbide written by and published by . This book was released on 2003 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polycrystalline SiC samples hot-pressed with aluminum, boron, and carbon sintering additions (ABC-SiC) were characterized using transmission electron microscopy. The study focused on the effects of high temperature treatment on microstructure.

Download or read book Ceramic Matrix Composites written by I M Low and published by Woodhead Publishing. This book was released on 2006-01-25 with total page 633 pages. Available in PDF, EPUB and Kindle. Book excerpt: The advent of engineering-designed polymer matrix composites in the late 1940s has provided an impetus for the emergence of sophisticated ceramic matrix composites. The development of CMCs is a promising means of achieving lightweight, structural materials combining high temperature strength with improved fracture toughness, damage tolerance and thermal shock resistance. Considerable research effort is being expended in the optimisation of ceramic matrix composite systems, with particular emphasis being placed on the establishment of reliable and cost-effective fabrication procedures. Ceramic matrix composites consists of a collection of chapters reviewing and describing the latest advances, challenges and future trends in the microstructure and property relationship of five areas of CMCs. Part one focuses on fibre, whisker and particulate-reinforced ceramic matrix composites, part two explores graded and layered ceramics, while the five chapters in part three cover nanostructured CMCs in some detail. Refractory and speciality ceramic composites are looked at in part four, with chapters on magnesia-spinel composite refractory materials, thermal shock of CMCs and superplastic CMCs. Finally, part four is dedicated to non-oxide ceramic composites. Ceramic matrix composites is a comprehensive evaluation of all aspects of the interdependence of processing, microstructure, properties and performance of each of the five categories of CMC, with chapters from experienced and established researchers. It will be essential for researchers and engineers in the field of ceramics and more widely, in the field of inorganic materials. Looks at the latest advances, challenges and future trends Compiled by experienced and established researchers in the field Essential for researchers and engineers

Download or read book In situ Materials Characterization written by Alexander Ziegler and published by Springer Science & Business Media. This book was released on 2014-04-01 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: The behavior of nanoscale materials can change rapidly with time either because the environment changes rapidly or because the influence of the environment propagates quickly across the intrinsically small dimensions of nanoscale materials. Extremely fast time resolution studies using X-rays, electrons and neutrons are of very high interest to many researchers and is a fast-evolving and interesting field for the study of dynamic processes. Therefore, in situ structural characterization and measurements of structure-property relationships covering several decades of length and time scales (from atoms to millimeters and femtoseconds to hours) with high spatial and temporal resolutions are crucially important to understand the synthesis and behavior of multidimensional materials. The techniques described in this book will permit access to the real-time dynamics of materials, surface processes and chemical and biological reactions at various time scales. This book provides an interdisciplinary reference for research using in situ techniques to capture the real-time structural and property responses of materials to surrounding fields using electron, optical and x-ray microscopies (e.g. scanning, transmission and low-energy electron microscopy and scanning probe microscopy) or in the scattering realm with x-ray, neutron and electron diffraction.

Download or read book Structural Ceramics written by F. L. Riley and published by Cambridge University Press. This book was released on 2009-05-14 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reviews production methods, microstructures, and properties of structural ceramics with important applications, including high voltage insulators, hot gas filters, machining tools, and hip joint replacements.

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.

Download or read book Ceramic Microstructures 86 written by Joseph A. Pask and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Proceedings of the International Materials Symposium on Ceramic Microstructures '86: Role of Interfaces presents a comprehensive coverage of the past decade's advances in ceramic science and technology related to microstructures. The term microstructure is used in the broad sense and is synonymous with char~cter. Character is defined as a complete detailed description of chemical and physical characteristics of a material. This symposium is the third in a series, held every ten years, on ceramic microstructures. The first symposium, in 1966, had as a subtitle "Their Analysis, Significance and Production" and emphasized the need and importance of characterization in order to fully understand the chemical and physical properties of materials. The second Symposium, in 1976, placed emphasis on the exploration of characters most suited and needed for "Energy-Related Applications." By the time of that conference, the sequence of processing--characterization--properties was fully accepted. It was recognized that characterization was the basis of materials science; the objective of processing was to produce a desired character that was considered necessary to realize a given property or behavior. To further emphasize the importance of character, the symposium dealt primarily with the property/character coupling.

Download or read book Diffusion and Defect Data written by and published by . This book was released on 2004 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Microstructure Development in Hot pressed Silicon Carbide written by and published by . This book was released on 2002 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: SiC was hot-pressed with aluminum, boron, and carbon additives. The Al content was modified either to obtain SiC samples containing a continuous Al gradient, or to vary the average Al content. In both cases, dramatic changes in microstructure, phase composition, and grain boundary structure were observed as a result of the Al variation. Similar processing and characterization were done with modified boron and carbon average contents. The systematic experiments allowed identification of the roles of Al, B, and C in developing grain morphology and phase composition. The experiments also clarified the mechanical property responses to microstructural modification. Tailoring of the SiC microstructure to suit different applications would be possible.

Download or read book Silicon Carbide Ceramics written by S. Somiya and published by Springer Science & Business Media. This book was released on 1991-08-31 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Silicon carbides have major industrial uses as high temperature structural ceramic materials. These two volumes are translated from the Japanese and provide a comprehensive account of the seminal work going on in Japan.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mechanical and Microstructural Study of Silicon Carbide and Pyrolytic Carbon Coatings in TRISO Fuel Particles written by Huixing Zhang and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: TRISO fuel particles have been developed as nuclear fuels used for a generation IV nuclear reactor: high temperature reactor. Such particle consists of a fuel kernel, pyrolytic carbon (PyC) and silicon carbide (SiC) coatings. This study has been carried out to establish a relationship between mechanical properties and microstructures of SiC coating and PyC coatings produced by fluidized bed chemical vapour deposition. Indentations were used to measure hardness, Young's modulus and fracture behaviour of SiC and PyC coatings. Fracture strength of SiC coatings was measured by crush test. Microstructure of SiC and PyC was mainly characterised by transmission/scanning electron microscopy and Raman spectroscopy. For SiC coatings produced at 1300 oC, Young's modulus is an exponential function of relative density. Hardness of SiC coatings is higher than the bulk SiC produced by CVD, and it is attributed to the high density of dislocations and their interactions. The deformation mechanism of SiC coatings under indentation is explained by presence of defects, such as grain boundaries and nano-pores. The fracture of these coatings beneath the Vickers indentation is the Palmqvist cracks, and indentation fracture toughness was in the range of 3.5-4.9 MPa m1/2. The stress-induced micro-cracks are assumed to be the mechanism for the high indentation fracture toughness. Different hardness and fracture toughness in these SiC coatings are attributed to influences of defects and grain morphology. Measurement of fracture strength was carried out on SiC coatings deposited at 1300-1500 oC. Weibull modulus and fracture strength of the full shell are dominated by the ratio of radius to thickness of coatings, and decrease linearly with the increase of this ratio. The influence of SiC/PyC interfacial roughness on fracture strength of the SiC was quantified by self-affine theory. The fracture strength decreases linearly with the increase of the roughness ratio, which is the long-wavelength roughness characteristic. After thermal treatment at 2000 oC, fracture strength decreased in SiC coatings due to the formation of pores, which are results of diffusion of native defects in as-deposited SiC coatings, and the change of Weibull modulus is related to the size and distribution of pores. For low density PyC coatings, Young's modulus and the mean pressure increase with the increase of the density; however, for high density PyC coatings, they are determined by interstitial defects. The hysteresis deformation behaviour under nano-indenation has been found be affected by density variation and thermal treatment, which is proposed to be due to the disorder structure in PyC coatings.

Download or read book Ceramic Abstracts written by and published by . This book was released on 2000 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Microstructure and Creep Failure of Silicon Carbide written by Geoffrey Hays Campbell and published by . This book was released on 1986 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comprehensive Materials Processing written by and published by Newnes. This book was released on 2014-04-07 with total page 5485 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive Materials Processing, Thirteen Volume Set provides students and professionals with a one-stop resource consolidating and enhancing the literature of the materials processing and manufacturing universe. It provides authoritative analysis of all processes, technologies, and techniques for converting industrial materials from a raw state into finished parts or products. Assisting scientists and engineers in the selection, design, and use of materials, whether in the lab or in industry, it matches the adaptive complexity of emergent materials and processing technologies. Extensive traditional article-level academic discussion of core theories and applications is supplemented by applied case studies and advanced multimedia features. Coverage encompasses the general categories of solidification, powder, deposition, and deformation processing, and includes discussion on plant and tool design, analysis and characterization of processing techniques, high-temperatures studies, and the influence of process scale on component characteristics and behavior. Authored and reviewed by world-class academic and industrial specialists in each subject field Practical tools such as integrated case studies, user-defined process schemata, and multimedia modeling and functionality Maximizes research efficiency by collating the most important and established information in one place with integrated applets linking to relevant outside sources

Download or read book Steels written by George Krauss and published by ASM International. This book was released on 2005 with total page 613 pages. Available in PDF, EPUB and Kindle. Book excerpt: Steels: Processing, Structure, and Performance is a comprehensive guide to the broad, dynamic physical metallurgy of steels. The volume is an extensively revised and updated edition of the classic 1990 book Steels: Heat Treatment and Processing Principles. Eleven new chapters expand the coverage in the previous edition, and other chapters have been reorganized and updated. This volume is an essential reference for anyone who makes, uses, studies, or designs with steel. The interrelationships between chemistry, processing, structure, and performance--the elements of physical metallurgy--are integrated for all the types of steel discussed. The evolution, characterization, and performance of steel microstructures are described, with increased emphasis on deformation and fracture. Heat treatment remains a vital aspect of the manufacture of steel products, and the coverage of thermal processing and its effect on steels is expanded in this edition. Dramatic changes in steel manufacture have occurred in the 15 years since the publication of the 1990 edition. Low-carbon sheet steels have experienced the most dynamic changes: thermal processing of sheet steels on a massive continuous scale has produced new grades with only subtle changes in chemistry. Low carbon sheet steels, together with strengthening mechanisms, developments in microalloyed forging steels, steels with bainitic and a variety of ferritic microstructures, quench and tempered steel performance, high-carbon steels for rail and ultra-high strength wire, and the causes of low toughness and embrittlement are all discussed in new chapters. Brief coverage is provided on the history of steel, including the time frame for important developments. A link to steelmaking and solidification is made in the chapter on the effects of primary processing on steel microstructure. The text is meant to be informative, readable, up-to-date, and self contained. Principles, concepts, and understanding of microstructural evolution and performance, within the framework of processing and properties, are illustrated, by plots of data, micrographs and schematic diagrams. A special effort has been made to include references to the most pertinent books, reviews, and technical papers on a given subject. About the Author Dr. George Krauss is currently University Emeritus Professor at the Colorado School of Mines and a metallurgical consultant specializing in steel microstructural systems. He served at Lehigh University as Assistant Professor, Associate Professor, and Professor of Metallurgy and Materials Science from 1963 to 1975, and in 1975, joined the faculty of the Colorado School of Mines as the AMAX Foundation Professor in Physical Metallurgy. He was the John Henry Moore Professor of Metallurgical and Materials Engineering at the time of his retirement from the Colorado School of Mines in 1997. In 1984, Dr. Krauss was a principal in the establishment of the Advanced Steel Processing and Products Research Center, a National Science Foundation Industry-University cooperative research center at the Colorado School of Mines, and served as its first Director until 1993. In addition to the three editions of the present volume, he coauthored the book Tool Steels, Fifth Edition, ASM International, 1998, and edited or co-edited conference volumes on tempering of steel, carburizing, zinc-based coatings on steel, and microalloyed forging steels. He has published over 300 papers and lectured widely in technical conferences, universities, corporations and ASM International chapters, including a number of keynote, invited and honorary lectures. He presented the Edward DeMille Campbell Memorial Lecture of ASM International in 2000 and the Howe Memorial Lecture of the Iron and Steel Society in 2003. Dr. Krauss has served as the President of the International Federation of Heat Treatment and Surface Engineering (IFHTSE), 1989-91, and as President of ASM International, 1996-97. He is Fellow of ASM International, TMS, and IFHTSE. He has been awarded the Adolf Martens Medal of the German Society for Heat Treatment and Materials, the Charles S. Barrett Silver Medal of the Rocky Mountain Chapter of ASM, the George Brown Gold Medal of 3.

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1974 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comprehensive Materials Finishing written by M.S.J. Hashmi and published by Elsevier. This book was released on 2016-08-29 with total page 1467 pages. Available in PDF, EPUB and Kindle. Book excerpt: Finish Manufacturing Processes are those final stage processing techniques which are deployed to bring a product to readiness for marketing and putting in service. Over recent decades a number of finish manufacturing processes have been newly developed by researchers and technologists. Many of these developments have been reported and illustrated in existing literature in a piecemeal manner or in relation only to specific applications. For the first time, Comprehensive Materials Finishing, Three Volume Set integrates a wide body of this knowledge and understanding into a single, comprehensive work. Containing a mixture of review articles, case studies and research findings resulting from R & D activities in industrial and academic domains, this reference work focuses on how some finish manufacturing processes are advantageous for a broad range of technologies. These include applicability, energy and technological costs as well as practicability of implementation. The work covers a wide range of materials such as ferrous, non-ferrous and polymeric materials. There are three main distinct types of finishing processes: Surface Treatment by which the properties of the material are modified without generally changing the physical dimensions of the surface; Finish Machining Processes by which a small layer of material is removed from the surface by various machining processes to render improved surface characteristics; and Surface Coating Processes by which the surface properties are improved by adding fine layer(s) of materials with superior surface characteristics. Each of these primary finishing processes is presented in its own volume for ease of use, making Comprehensive Materials Finishing an essential reference source for researchers and professionals at all career stages in academia and industry. Provides an interdisciplinary focus, allowing readers to become familiar with the broad range of uses for materials finishing Brings together all known research in materials finishing in a single reference for the first time Includes case studies that illustrate theory and show how it is applied in practice