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Development Of Processes For The Production Of High Quality Long Length Sic Whiskers
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Book Synopsis Development of Processes for the Production of High-quality, Long-length SiC Whiskers by : James J. Shyne
Download or read book Development of Processes for the Production of High-quality, Long-length SiC Whiskers written by James J. Shyne and published by . This book was released on 19?? with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beta silicon carbide whiskers in the form of long staple wool (1 - 10 microns diameter by 1/2 in. 1 in. length) have been grown by flowing a H2, CO, CH4, and N2 gas mixture through a reactor containing a silica source, and five pounds of the output whisker product have been delivered. Growth studies have been made in the temperature range of 2300 to 2800F in growth times ranging from 4 to 24 hours. The reactor consisted of a 20 KW furnace containing a quartz muffle. Gas composition, collector geometry, and materials have been studied to enhance the type and quantity of silicon carbide wool produced. The whiskers appear to grow by a vapor-liquid-solid mechanism. The wool formed has a cotton-like texture and is amenable to forming into yarns. The wool varies in color from buff to dark green presumably because of trace impurities. The whiskers are triangular in cross section and X-ray analysis has identified the material as beta silicon carbide. Tensile tests on the product have measured average rupture strengths in excess of one million psi and elastic modulus in the range of 92-95 million psi. Engineering design and scale-up studies at the level of 100 pounds per year of whisker wool have been conducted in a furnace with a 15-foot growth zone designed.
Book Synopsis 15th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2, Volume 12, Issue 7/8 by : John B. Wachtman
Download or read book 15th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2, Volume 12, Issue 7/8 written by John B. Wachtman and published by John Wiley & Sons. This book was released on 2009-09-28 with total page 682 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.
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 912 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fiber Reinforced Ceramic Composites by : K.S. Mazdiyasni
Download or read book Fiber Reinforced Ceramic Composites written by K.S. Mazdiyasni and published by William Andrew. This book was released on 1990-12-31 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides the first comprehensive treatment of continuous and discontinuous ceramic fiber and whisker reinforced ceramic composites, written by 29 authorities in the field.
Book Synopsis Concise Encyclopedia of Composite Materials by : A. Kelly
Download or read book Concise Encyclopedia of Composite Materials written by A. Kelly and published by Elsevier. This book was released on 2012-12-02 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Concise Encyclopedia of Composite Materials, first published as a hardbound edition in 1989, has been updated and revised and is now available as a paperback for individual researchers requiring a fundamental reference source for this dynamic field. Since 1989, research involving composite materials has advanced rapidly and this revised edition reflects those changes with the addition of new articles, including recent work on nanocomposites, smart composite materials systems, and metallic multilayers. The 67 articles included in this revised edition are presented in alphabetical order and each provides an introduction to one aspect of composite materials. Every article is extensively cross-referenced and includes a full bibliography. The volume contains over 250 photographs, drawings and tables as well as exhaustive subject and author indexes. The comprehensive breadth of coverage of the field of composite materials makes this volume an invaluable source of reference for materials scientists and mechanical engineers involved in industrial and academic research into the fabrication, properties and applications of composite materials.
Book Synopsis 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2, Volume 14, Issue 7/8 by : John B. Wachtman
Download or read book 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2, Volume 14, Issue 7/8 written by John B. Wachtman and published by John Wiley & Sons. This book was released on 2009-09-28 with total page 704 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.
Book Synopsis Bibliography on Fibers and Composite Materials--1969-1972 by : J. N. Fleck
Download or read book Bibliography on Fibers and Composite Materials--1969-1972 written by J. N. Fleck and published by . This book was released on 1972 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: The bibliography contains over 3000 references, including translated items from Japan, West Germany, U.S.S.R., and other countries as well as references of original English language publications of the United States and United Kingdom. The references are categorized by specific fiber and matrix materials. In addition, many references are grouped in the general categories of compatibility studies, theory and design, testing and evaluation, application, and fabrication. A group of references to general review articles is included. The references represent the holdings of the former Defense Ceramic Information Center (DCIC) plus those of the Fibers and Composites Center (FCIC) at Battelle's Columbus Laboratories and MCIC. (Author).
Book Synopsis Concise Encyclopedia of Advanced Ceramic Materials by : R.J. Brook
Download or read book Concise Encyclopedia of Advanced Ceramic Materials written by R.J. Brook and published by Elsevier. This book was released on 2012-12-02 with total page 605 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced ceramics cover a wide range of materials which are ceramic by nature but have been developed in response to specific requirements. This encyclopedia collects together 137 articles in order to provide an up-to-date account of the advanced ceramic field. Some articles are drawn from the acclaimed Encyclopedia of Materials Science and Engineering, often revised, and others have been newly commissioned. The Concise Encyclopedia of Advanced Ceramic Materials aims to provide a comprehensive selection of accessible articles which act as an authoritative guide to the subject. The format is designed to help the readers form opinions on a particular subject. Arranged alphabetically, with a broad subject range, the articles are diverse in character and style, thereby stimulating further discussion. Topics covered include survey articles on glass, hot pressing, insulators, powders, and many are concerned with specific chemical systems and their origins, processing and applications. The Concise Encyclopedia of Advanced Ceramic Materials will be invaluable to materials scientists, researchers, educators and industrialists working in technical ceramics.
Book Synopsis Whisker Reinforced Structural Ceramics by :
Download or read book Whisker Reinforced Structural Ceramics written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A VLS (vapor-liquid-solid) whisker growth process, optimized for the production of short (approx. 10 mm lengths) SiC whiskers, was modified to produce greater than or equal to 25 mm long whiskers. In conjunction with this modification, a plan was developed for incorporating an artificial-intelligence system to enhance the whisker growth process. An oriented whisker ribbon was produced from the long whiskers, as a step toward the development of a staple whisker yarn.
Book Synopsis Handbook of Fillers and Reinforcements for Plastics by : Harry S. Katz
Download or read book Handbook of Fillers and Reinforcements for Plastics written by Harry S. Katz and published by . This book was released on 1978 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fabrication of SiC Whiskers and Composites by :
Download or read book Fabrication of SiC Whiskers and Composites written by and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Los Alamos Structural Ceramics Program is a multi-faceted program with an overall objective of producing superior strength and fracture toughness in ceramic bodies for load bearing applications. One phase of the program is pursuing the development of silicon carbide whiskers which are used to prepare ceramic matrix composites. The purpose of this work is to investigate strengthening and toughening mechanisms in ceramic composites. In the following we describe some elements of the whisker development program in which we are endeavoring better to characterize the whisker growth process in order to scale up its production potential. We have used these whiskers in the preparation of four types of ceramic matrix representative of a range of materials. The nature and reasons for choosing these materials are described. Composites have been prepared by dry-blending followed by hot pressing which yields high density bodies. In addition we are beginning an investigation of wet processing (slip casting) to produce a silicon-silicon carbide body which will be reaction sintered in nitrogen. Composites of glass-, hot pressed silicon nitride -, and molybdenum disilicide - silicon carbide whiskers have been tested in flexure to determine strength and fracture toughness. Results have been promising, with substantial toughening exhibited in all systems, and strengthening in the glass and MoSi2 composites. The reaction bonded silicon nitride is not yet to the testing stage.
Book Synopsis Summary of the Fifteenth Refractory Composites Working Group Meeting by : D. J. Maykuth
Download or read book Summary of the Fifteenth Refractory Composites Working Group Meeting written by D. J. Maykuth and published by . This book was released on 1969 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Silicon Carbide Whiskers by : Henry Pàl Kirchner
Download or read book Silicon Carbide Whiskers written by Henry Pàl Kirchner and published by . This book was released on 1962 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Application of Artificial Intelligence Control to the Vapor-liquid-solid Silicon Carbide Whisker Process by :
Download or read book Application of Artificial Intelligence Control to the Vapor-liquid-solid Silicon Carbide Whisker Process written by and published by . This book was released on 1989 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Silicon carbide whiskers have excellent mechanical and chemical properties, making them very desirable as a reinforcement for structural ceramic and other composite materials. Los Alamos has developed a laboratory-scale batch process for producing very high quality SiC whiskers by the vapor-liquid-solid (VLS) method which is an active candidate for technology transfer involving significant scale-up. The process, however, involves quite complex chemical/physical and parametric relationships and has not as yet lent itself successfully to modeling. An expert computer system was therefore developed to facilitate the transfer of this technology to industry. Optimum conditions were determined by relating the many process parameters to product results to establish a set of rules for running the process. These are incorporated in a two-phase expert system designed to guide inexperienced users. In Phase 1, an expert consultant program provides the user with information that enables him to set up the run. This information is incorporated into the rule base that makes up Phase 2 -- the control system. At present, the operator functions as the controller by responding to the decisions of the expert system; automation can be added later. 13 refs., 16 figs.
Download or read book Government Reports Index written by and published by . This book was released on 1972 with total page 932 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Silicon Carbide Whiskers for Composites by :
Download or read book Silicon Carbide Whiskers for Composites written by and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Silicon carbide (SiC) whiskers have great potential as reinforcements for structural ceramic matrix composites with significantly improved fracture toughness and strength. Such whiskers, synthesized at Los Alamos by a vapor-liquid-solid (VLS) process, are single crystal fibers with diameters in the range of 0.1 to 10 .mu.m and lengths presently as long as 100 mm. They possess superb mechanical properties, with an average strength of 8.4 GPa (1,220,000 psi) and an average elastic modules of 580 GPa (84,000,000 psi), as well as excellent elevated temperature stability. Future possibilities include the synthesis of long SiC whiskers for continuous fiber composites, and other types of whisker materials to extend the range of new ceramic composite systems.
Book Synopsis Composite Materials and Processing by : M. Balasubramanian
Download or read book Composite Materials and Processing written by M. Balasubramanian and published by CRC Press. This book was released on 2013-10-04 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: Composite Materials and Processing provides the science and technology of processing several composites using different processing methods, and includes collective information on the processing of common and advanced composite materials. It also weighs the advantages and disadvantages of various processing methods. This book is suitable for materia
