Download or read book The Synthesis of Boron Carbide Filaments written by A. Gatti and published by . This book was released on 1964 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Boron Synthesis Structure and Properties written by Jack Arnold Kohn and published by Springer. This book was released on 2013-12-01 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Boron Carbide Continuous Filaments Part Ii written by and published by . This book was released on 1966 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this program was to develop and evaluate a process for producing continuous lengths of boron carbide filament having tensile strengths approaching 500,000 psi and elastic moduli close to that of bulk boron carbide (60-70 million psi) are being developed. Filaments were produced by depositing the reaction product of born trichloride, hydrogen and methane on a heated tungsten filamentary substrate which had a boron primer coat. Excess hydrogen was used as a carrier gas. Initial evaluation of the boron carbide filaments as a reinforcement for epoxy resins indicated that no wetting problem between the filament/resin existed, that the transfer of stresses to the filaments was efficient, and that the wet strength problem, which is characteristic of boron/epoxy composites, may not be as severe when boron carbide filaments are used. Characterization studies were performed on typical filament specimens, and the results indicated an amorphous structure with two prevailing surface morphologies, (1) granular or (2) nodular, depending on the mode of nucleation. The final apparatus evolved for the production of B4C filaments utilized a high mass flow gas system in a seven stage reactor which had a deposition zone twenty-one inches long.
Download or read book Carbide Nitride and Boride Materials Synthesis and Processing written by A.W. Weimer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 675 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbide, Nitride and Boride Materials Synthesis and Processing is a major reference text addressing methods for the synthesis of non-oxides. Each chapter has been written by an expert practising in the subject area, affiliated with industry, academia or government research, thus providing a broad perspective of information for the reader. The subject matter ranges from materials properties and applications to methods of synthesis including pre- and post-synthesis processing. Although most of the text is concerned with the synthesis of powders, chapters are included for other materials such as whiskers, platelets, fibres and coatings. Carbide, Nitride and Boride Materials Synthesis and Processing is a comprehensive overview of the subject and is suitable for practitioners in the industry as well as those looking for an introduction to the field. It will be of interest to chemical, mechanical and ceramic engineers, materials scientists and chemists in both university and industrial environments working on or with refractory carbides, nitrides and borides.
Download or read book Study of the Growth Parameters Involved in Synthesizing Boron Carbide Filaments written by A. Gatti and published by . This book was released on 1965 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Study of the Growth Parameters Involved in Synthesizing Boron Carbide Filaments written by A. Gatti and published by . This book was released on 1965 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Scientific and Technical Reports written by United States. National Aeronautics and Space Administration Scientific and Technical Information Division and published by . This book was released on 1965 with total page 1152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1991 with total page 1460 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Boron and Refractory Borides written by G.V. Samsonov and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt: V. I. MATKOVICH During the meeting of the International Symposium on Boron held in October, 1972 in Tbilisi, U.S.S.R., the idea was proposed to assemble a review of boron and refractory borides by the specialists present. The advantages of such a work were immediately apparent. Such diverse applications of borides as in protective armor, nuclear reactors, coat ings, reinforcement, etc. can hardly all be presented in sufficient detail by a single author. On the other hand it was also recognized that with so much specialization, some areas of interest may not be covered. Within the last decade or two a number of areas have been developed in which the use of refractory borides is growing and improvements are being actively explored. Thus, a number of borides have considerable potential as reinforcing material for plastics or light metals, though only boron fibers have been firmly established up to the present. Ap plication of flakes and films for two-dimensional reinforcement appears attractive, although the high cost of materials and development repre sents a considerable barrier. A number of borides have been used to manufacture lightweight protec tive armor. In this area relatively fast changes seem to be taking place as improvements in performance and weight are made. Boron carbide has found considerable use in this application and new developments exploit the light weight of beryllium borides.
Download or read book Study of the Growth Parameters Involved in Synthesizing Boron Carbide Filaments written by A. Gatti and published by . This book was released on 1965 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Physics and Chemistry of Carbides Nitrides and Borides written by R. Freer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbides, nitrides and borides are families of related refractory materials. Traditionally they have been employed in applications associated with engineering ceramics where either high temperature strength or stability is of primary importance. In recent years there has been a growing awareness of the interesting electrical, thermal and optical properties exhibited by these materials, and the fact that many can be prepared as monolithic ceramics, single crystals and thin films. In practical terms carbides, nitrides and borides offer the prospect of a new generation of semiconductor materials, for example, which can function at very high temperatures in severe environmental conditions. However, as yet, we have only a limited understanding of the detailed physics and chemistry of the materials and how the preparation techniques influence the properties. Under the auspices of the NATO Science Committee an Advanced Research Workshop (ARW) was held on the Physics and Chemistry of Carbides, Nitrides and Borides (University of Manchester, 18-22 September, 1989) in order to assess progress to date and identify the most promising themes and materials for future research. An international group of 38 scientists considered developments in 5 main areas: The preparation of powders, monolithic ceramics, single crystals and thin films; Phase transformations, microstructure, defect structure and mass transport; Materials stability; Theoretical studies; Electrical, thermal and optical properties of bulk materials and thin films.
Download or read book Chemical Vapor Deposition International Conference written by and published by . This book was released on 1970 with total page 878 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Vapor Deposition written by John Milton Blocher and published by . This book was released on 1970 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tailoring Multiphase and Composite Ceramics written by Richard E. Tressler and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 783 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings of the Twenty-First University Conference on Ceramic Science held at The Pennsylvania State University, University Park, PA on July 17, 18 and 19, 1985 are compiled in this volume "Tailoring Multiphase and Composite Ceramics". This Conference emphasized the' discussion and analysis of the properties of multiphase ceramic materials in which the microstructure is deliberately tailored for specific applications or properties. Inter nationally recognized authorities presented keynote and invited lectures on topics dealing with processing and fabrication of multiphase and com posite electroceramics, fiber reinforced composites and high temperature multiphase ceramics. Results of recent research were presented in oral and poster sessions by leading researchers from several countries. This collection of papers represents the state of the art in our understand ing of the processing-structure-property interrelationships for these materials which possess unique and useful electrical, magnetic, optical, mechanical and thermal properties as a result of their multiphase nature. We are grateful for the financial support of the National Science Foundation, the Office of Naval Research, the Air Force Office of Scien tific Research, and the Defense Advanced Research Projects Agency for this conference. We gratefully acknowledge Prof. Robert Davis' leader ship role in steering and expanding this university conference series on ceramic science. We thank Ron Avillion and Linda Rose for their expert assistance in planning and coordinating the meeting. Thanks are due to Ms. Marian Reed, Ms. Judy Bell and Ms.
Download or read book A Selected Listing of NASA Scientific and Technical Reports for written by United States. National Aeronautics and Space Administration. Scientific and Technical Information Division and published by . This book was released on 1964 with total page 1156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Boron Carbide Continuous Filaments written by A. Gatti and published by . This book was released on 1965 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this program was to develop and evaluate a process for producing continuous lengths of boron carbide filament having tensile strengths approaching 500,000 psi and elastic moduli close to that of bulk boron carbide (60-70 million psi) are being developed. Filaments were produced by depositing the reaction product of born trichloride, hydrogen and methane on a heated tungsten filamentary substrate which had a boron primer coat. Excess hydrogen was used as a carrier gas. Initial evaluation of the boron carbide filaments as a reinforcement for epoxy resins indicated that no wetting problem between the filament/resin existed, that the transfer of stresses to the filaments was efficient, and that the wet strength problem, which is characteristic of boron/epoxy composites, may not be as severe when boron carbide filaments are used. Characterization studies were performed on typical filament specimens, and the results indicated an amorphous structure with two prevailing surface morphologies, (1) granular or (2) nodular, depending on the mode of nucleation. The final apparatus evolved for the production of B4C filaments utilized a high mass flow gas system in a seven stage reactor which had a deposition zone twenty-one inches long.
Download or read book Low Temperature Synthesis of Boron Carbide Using a Polymer Precursor Powder Route written by and published by . This book was released on 2011 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt:
