Download or read book The Decomposition of Methyltrichlorosilane written by and published by . This book was released on 1994 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental measurements of the decomposition of methyltrichlorosilane (MTS), a common silicon carbide precursor, in a high-temperature flow reactor are presented. The results indicate that methane and hydrogen chloride are major products of the decomposition. No chlorinated silane products were observed. Hydrogen carrier gas was found to increase the rate of MTS decomposition. The observations suggest a radical-chain mechanism for the decomposition. The implications for silicon carbide chemical vapor deposition are discussed.
Download or read book Unimolecular Decomposition of Methyltrichlorosilane written by and published by . This book was released on 1993 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on reaction thermochemistry and estimates of Arrhenius A-factors, it is expected that Si-C bond cleavage, C-H bond cleavage, and HCl elimination will be the primary channels for the unimolecular decomposition of methyltrichlorosilane. Using RRKM theory, we calculated rate constants for these three reactions. The calculations support the conclusion that these three reactions are the major decomposition pathways. Rate constants for each reaction were calculated in the high-pressure limit (800--1500 K) and in the falloff regime (1300--1500 K) for bath gases of both helium and hydrogen. These calculations thus provide branching fractions as well as decomposition rates. We also calculated bimolecular rate constants for the overall decomposition in the low-pressure limit. Interesting and surprising kinetic behavior of this system and the individual reactions is discussed. The reactivity of this chlorinated organosilane is compared to that of other organosilanes.
Download or read book Thermal Decomposition of Molecules Relevant to Combustion and Chemical Vapor Deposition by Flash Pyrolysis Time of flight Mass Spectrometry written by Jessy Mario Lemieux and published by . This book was released on 2013 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flash pyrolysis coupled with vacuum-ultraviolet photoionization time-of-flight mass spectrometry was used to study the thermal decomposition mechanisms of molecules relevant to fuel combustion and the chemical vapor deposition (CVD) of SiGe, SiC, and GeC. For combustion research, the thermal decomposition of benzyl radical, n-alkanes C n H2n+2 (n = 5-8 and 10), 1-butyl radical, and 1-pentyl radical was performed. Benzyl was confirmed to decompose primarily by ejection of H atom after significant isomerization with loss of methyl observed as a minor decomposition pathway. Thermal decomposition of n-alkanes by C-C bond homolysis was directly observed with preferential fission of central C-C bonds. Methyl radical formation by homolysis of the [Alpha] C-C bond was observed to be the least significant C-C bond homolysis pathway. Decomposition of 1-butyl by [Beta]-scission to form ethene and ethyl radical was directly observed. Significant isomerization of 1-pentyl radicals by 1,4-H migration followed by [Beta]-scission was observed at temperatures below 900 K with direct [Beta]-scission of 1-pentyl becoming increasingly prevalent at higher temperatures. Gas phase CVD research included pyrolysis of SiH 4 /GeH4 mixture, tetramethylsilane, tetramethylgermane, and several methylchlorosilanes. Formation of highly unsaturated SiGeHz , Si2 GeHz , Si3 GeHz , SiGe2 H z , SiGe3 Hz and SiGe5 Hz clusters in the pyrolysis of a 1 to 1 SiH4 /GeH4 mixture by a silylene/germylene insertion mechanism was observed. The decomposition of tetramethylsilane and tetramethylgermane by Si-C bond homolysis was confirmed and newly observed secondary decomposition mechanisms were demonstrated. The decomposition of methyltrichlorosilane (MTS), an established SiC CVD precursor, was studied. Decomposition occurred primarily via Si-C bond homolysis at temperatures below 1350 K with elimination of CH 3 Cl to form SiCl2 becoming increasingly important as the pyrolysis temperature was increased. The mechanism of MTS decomposition was also compared to two other potential precursors, dimethyldichlorsilane and methyldichlorosilane.
Download or read book High quality Thorium TRISO Fuel Performance in HTGRs written by and published by Forschungszentrum Jülich. This book was released on 2013 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Vapor Deposition of Refractory Metals and Ceramics written by and published by . This book was released on 1994 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 2012-04-17 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.
Download or read book Organosilicon Chemistry written by Sam Stuart and published by Elsevier. This book was released on 2013-09-11 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organosilicon Chemistry provides information pertinent to the fundamental aspects and application of organosilicon chemistry. This book discusses the exact manner and extent of d-orbital involvement in organosilicon compounds in ground, electronic, and transition excited states. Organized into two parts encompassing 21 chapters, this book begins with an overview of preparing stable organosiliconium ions. This text then discusses the use of fused salts as reaction media in the preparative chemistry. Other chapters consider a detailed investigation on the molecular association and volatility of alkoxides of group (IV) elements. This book discusses as well the reaction between dimethyldichlorosilane and ethylene glycon, which has been shown to produce a dimeric ten-membered ring compound. The final chapter deals with the results of the investigations concerning the properties of the contact mass and of the non-volatile silicon-free products, which are produced in the direct synthesis of phenylhalogenosilanes. This book is a valuable resource for chemists and research workers.
Download or read book Chemical Vapor Deposition of Refractory Metals and Ceramics III Volume 363 written by Bernard M. Gallois and published by . This book was released on 1995-04-05 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: CVD (chemical vapor deposition) technology is receiving much interest in the scientific community, in particular for synthesizing new materials with tailored chemical composition and physical properties that offer multiple functionality. Multiphase or multilayered films, functionally graded materials (FGMs), "smart" material structures and nanocomposites are just a few examples of the new classes of materials being produced via CVD. This third volume in the series from MRS offers an interdisciplinary perspective on technological issues relevant to CVD materials and processes, and provides a forum for the exchange of new scientific results. Topics include: fundamentals, modeling and diagnostics; process/microstructure/property relationships; diamond, cubic boron nitride and related materials; organometallic chemical vapor deposition and novel approaches.
Download or read book Chemical Vapour Deposition written by Xiu-Tian Yan and published by Springer Science & Business Media. This book was released on 2010-03-23 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Chemical Vapour Deposition: An Integrated Engineering Design for Advanced Materials" focuses on the application of this technology to engineering coatings and, in particular, to the manufacture of high performance materials, such as fibre reinforced ceramic composite materials, for structural applications at high temperatures. This book aims to provide a thorough exploration of the design and applications of advanced materials, and their manufacture in engineering. From physical fundamentals and principles, to optimization of processing parameters and other current practices, this book is designed to guide readers through the development of both high performance materials and the design of CVD systems to manufacture such materials. "Chemical Vapour Deposition: An Integrated Engineering Design for Advanced Materials" introduces integrated design and manufacture of advanced materials to researchers, industrial practitioners, postgraduates and senior undergraduate students.
Download or read book Kinetic Investigation of the Chemical Vapor Deposition of Silicon Carbide Through Thermal Decomposition of Methyltrichlorosilane written by George D. Papasouliotis and published by . This book was released on 1997 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Materials Engineering and Science written by Brian S. Mitchell and published by John Wiley & Sons. This book was released on 2023-11-14 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt: Materials Engineering and Science Understand the relationship between processing and material properties with this streamlined introduction Materials engineering focuses on the complex and crucial relationship between the physical properties of materials and the chemical bonds that comprise them. Specifically, this field of study seeks to understand how materials can be designed to meet specific design and performance criteria. This ‘materials paradigm’ has, in recent years, become integral to numerous cutting-edge areas of technological development. Materials Engineering and Science seeks to introduce this vital and fast-growing subject to a new generation of scientists and engineers. It integrates core thermodynamic, kinetic, and transport principles into its analysis of the structural, mechanical, and physical properties of materials, creating a streamlined and intuitive approach that fosters understanding. Now fully revised to reflect the latest research and educational paradigms, this is an essential resource. Readers of the second edition will also find: Detailed discussion of all major classes of materials, including polymers, composites, and biologics New and expanded treatment of nanomaterials, additive manufacturing (3D printing), and molecular simulation Web-based and physical supplementary materials including an instructor guide, solutions manual, and sample lecture slides Materials Engineering and Science is ideal for all advanced undergraduate and early graduate students in engineering, materials science, and related subjects.
Download or read book Journal of General Chemistry of the USSR in English Translation written by and published by . This book was released on 1968 with total page 796 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Introduction to Materials Engineering and Science for Chemical and Materials Engineers written by Brian S. Mitchell and published by John Wiley & Sons. This book was released on 2004-01-16 with total page 976 pages. Available in PDF, EPUB and Kindle. Book excerpt: An Introduction to Materials Engineering and Science for Chemical and Materials Engineers provides a solid background in materials engineering and science for chemical and materials engineering students. This book: Organizes topics on two levels; by engineering subject area and by materials class. Incorporates instructional objectives, active-learning principles, design-oriented problems, and web-based information and visualization to provide a unique educational experience for the student. Provides a foundation for understanding the structure and properties of materials such as ceramics/glass, polymers, composites, bio-materials, as well as metals and alloys. Takes an integrated approach to the subject, rather than a "metals first" approach.
Download or read book Proceedings of the Symposium on High Temperature Corrosion and Materials Chemistry written by Electrochemical Society. High Temperature Materials Division and published by The Electrochemical Society. This book was released on 1998 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Vapor Deposition written by Electrochemical Society. High Temperature Materials Division and published by The Electrochemical Society. This book was released on 1997 with total page 1686 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book CVD XII written by Klavs F. Jensen and published by . This book was released on 1993 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fracture Mechanics of Ceramics written by R.C. Bradt and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 591 pages. Available in PDF, EPUB and Kindle. Book excerpt: Second part of the proceedings of the Sixth International Symposium held in Karlsruhe, Germany, July 18-20, 1995.
