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 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 Technical Abstract Bulletin written by Defense Documentation Center (U.S.) and published by . This book was released on 1967 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research on Structure Characterization of Continuous Filament Materials written by R. P. I. Adler and published by . This book was released on 1967 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Characterization studies of vapor deposited boron carbide, titanium diboride, and silicon carbide filaments were performed. Boron carbide, with maximum strengths of around 100,000 psi, contained large amounts of pyrolytic graphite. Titanium diboride had a coating of TiB2 on the substrate but only had maximum strengths of 140,000 psi. Silicon carbide, consisting primarily of a fine grained polycrystalline Beta-SiC coating on a W substrate, could be produced having 300,000 psi failure stresses but the highest strengths (385,000 psi) were achieved with a boron dopant. Thermal exposures of SiC filaments to temperatures in excess of 1000C for short periods of time in an inert argon atmosphere can reduce the failure strengths from over 300,000 psi to below 100,000 psi. (Author).
Download or read book Abstracts of AF Materials Laboratory Reports written by Air Force Materials Laboratory (U.S.) and published by . This book was released on 1967 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: Technical reports published by the Air Force Materials Laboratory during the period 1 July 1966-31 December 1966 are abstracted herein and indexed by branches of the laboratory, technical subject matter, investigator, project monitor and contractor. Reports on research conducted by the Air Force Materials Laboratory personnel as well as that conducted on contract are included.
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 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 Handbook of Composites written by George Lubin and published by Springer Science & Business Media. This book was released on 2013-11-27 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of advanced composites, tion. Forecasts indicate that the potential spanning a brief period from inception to usage in automobiles in the early 1990's will application of only 15 to 20 years, epitomizes amount to millions of pounds of advanced the rapidity with which a generation's change composites. in the state-of-the-art can take place. This is in We find ourselves in a peculiar position. marked contrast to past history, in which it The hardware capability is progressing so has usually required 25 years or more of rapidly that the knowledge and familiarity of research before a new structural material was the designer can hardly keep pace. We have an technologically ready. obligation now not just to mature this ad In the mid-1950's the U.S. Air Force identi vanced technology and its applications, but fied the promise for early application of a new also to communicate the state-of-the-art to the class of materials-advanced composites designer in a form in which it can be applied and established its feasibility by the fabrication readily to practical structures. I believe that of raw fiber with exceptional strength- and this book, Handbook of Composites, will modulus-to-weight ratios. The practical fabrica clearly provide a portion of this missing link.
Download or read book Abstracts of Active Contracts Air Force Materials Laboratory written by Air Force Materials Laboratory (U.S.). and published by . This book was released on 1969 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstracts of Air Force Materials Laboratory contracts that were active on 28 February 1969 are reported, The abstracts are ordered by Divisions of the Laboratory and are indexed by contract number and task number. Each abstract entry provides the title of the contract, contractor, duration, project engineer, objective and progress.
Download or read book Methods of Producing Continuous Boron Carbide Fibers written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Methods of producing continuous boron carbide fibers. The method comprises reacting a continuous carbon fiber material and a boron oxide gas within a temperature range of from approximately 1400.degree. C. to approximately 2200.degree. C. Continuous boron carbide fibers, continuous fibers comprising boron carbide, and articles including at least a boron carbide coating are also disclosed.
Download or read book Abstracts of Active Contracts written by and published by . This book was released on 1966 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstracts of Air Force Materials Laboratory contracts that were active on 15 August 1966 are reported. The abstracts are ordered by Divisions of laboratory and are indexed by contract number. Each abstract entry provides the title of the contract, contractor, duration, project engineer, objective and progress.
Download or read book Chemical Processes Advances in Research and Application 2013 Edition written by and published by ScholarlyEditions. This book was released on 2013-06-21 with total page 988 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemical Processes—Advances in Research and Application: 2013 Edition is a ScholarlyBrief™ that delivers timely, authoritative, comprehensive, and specialized information about ZZZAdditional Research in a concise format. The editors have built Chemical Processes—Advances in Research and Application: 2013 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about ZZZAdditional Research in this book to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Chemical Processes—Advances in Research and Application: 2013 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.
Download or read book Handbook of Composite Reinforcements written by Stuart M. Lee and published by John Wiley & Sons. This book was released on 1996-12-17 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive single volume handbook covers every aspect of reinforcement science, from hands-on subjects, such as manual 'lay-up' processing, to theoretical discussions concerning rheology and modeling. Taken from the recently published six volume International Encyclopedia of Composites, this reference volume offers scholarly and practical knowledge of distinguished industry-experts, academics, and government researchers in one accessible and informative handbook. Fibers, processes, and composite reinforcement types, as well as relevant miscellaneous subjects such as property relationships, manufacturing, hybrid reinforcements, and modeling are given detailed treatment. Engineers, materials scientists, and technologists will find the Composite Reinforcement Handbook an invaluable tool.
Download or read book Handbook of Composite Fabrication written by Güneri Akovali and published by iSmithers Rapra Publishing. This book was released on 2001 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is a concise reference book for someone who has just started working in the composites field, as well as for technologists already active in the area. The chapters in this handbook have been written by experts in their fields and so the information on a particular subject area can be regarded as state of the art. Each chapter is fully referenced, illustrated and includes case studies and applications of polymer composite fabrications.
Download or read book Federal Register written by and published by . This book was released on 1969-06 with total page 932 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nanotechnology Concepts Methodologies Tools and Applications written by Management Association, Information Resources and published by IGI Global. This book was released on 2014-02-28 with total page 1654 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past few decades, devices and technologies have been significantly miniaturized from one generation to the next, providing far more potential in a much smaller package. The smallest of these recently developed tools are miniscule enough to be invisible to the naked eye. Nanotechnology: Concepts, Methodologies, Tools, and Applications describes some of the latest advances in microscopic technologies in fields as diverse as biochemistry, materials science, medicine, and electronics. Through its investigation of theories, applications, and new developments in the nanotechnology field, this impressive reference source will serve as a valuable tool for researchers, engineers, academics, and students alike.
Download or read book Advanced Inorganic Chemistry Vol 1 written by and published by Krishna Prakashan Media. This book was released on with total page 1480 pages. Available in PDF, EPUB and Kindle. Book excerpt:
