Download or read book On the Formation of Beta SiC in the Initial Growth Stage written by Yoshizō Inomata and published by . This book was released on 1972 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: The formation of Beta-SiC at temperatures outside its thermally stable range of 1,400-1,600C was studied experimentally using the sublimation procedure and the synthetic method with molten silicon. From consideration of the molar surface energy of Beta- and alpha-SiC, the following are shown to be the main causes for the phenomenon: (1) Given an equal volume of crystallites, the molar surface energy of the Beta-type is always lower than that of the alpha-type based on its higher lattice symmetry; (2) the bonding energy of the Beta-type is the lowest among the SiC polytypes from comparison of the band gaps; (3) the rate of transition from the Beta- to the alpha-type is not too large. The free energy gaps among the SiC polytypes were found to be smaller than 100 cal/mole. The effects of pressure and polarity are also discussed.
Download or read book On the Formation of Beta SiC in the Initial Growth Stage written by Yoshizō Inomata and published by . This book was released on 1972 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The formation of Beta-SiC at temperatures outside its thermally stable range of 1,400-1,600C was studied experimentally using the sublimation procedure and the synthetic method with molten silicon. From consideration of the molar surface energy of Beta- and alpha-SiC, the following are shown to be the main causes for the phenomenon: (1) Given an equal volume of crystallites, the molar surface energy of the Beta-type is always lower than that of the alpha-type based on its higher lattice symmetry; (2) the bonding energy of the Beta-type is the lowest among the SiC polytypes from comparison of the band gaps; (3) the rate of transition from the Beta- to the alpha-type is not too large. The free energy gaps among the SiC polytypes were found to be smaller than 100 cal/mole. The effects of pressure and polarity are also discussed.
Download or read book Silicon Carbide and Related Materials 2004 written by Roberta Nipoti and published by Trans Tech Publications Ltd. This book was released on 2005-05-15 with total page 1148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume is indexed by Thomson Reuters CPCI-S (WoS). Silicon Carbide (SiC), Gallium Nitride (GaN) and Diamond are examples of wide-bandgap semiconductors having chemical, electrical and optical properties which make them very attractive for the fabrication of high-power and high-frequency electronic devices, as well as of light-emitters and sensors which have to operate under harsh conditions.
Download or read book Silicon Carbide Ceramics 1 written by S. Somiya and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discovered by Edward G. Acheson about 1890, silicon carbide is one of the oldest materials and also a new material. It occurs naturally in meteorites, but in very small amounts and is not in a useable state as an industrial material. For industrial require ments, large amounts of silicon carbide must be synthesized by solid state reactions at high temperatures. Silicon carbide has been used for grinding and as an abrasive material since its discovery. During World War II, silicon carbide was used as a heating element; however, it was difficult to obtain high density sintered silicon carbide bodies. In 1974, S. Prochazka reported that the addition of small amounts of boron compounds and carbide were effective in the sintering process to obtain high density. It was then possible to produce high density sintered bodies by pressureless sintering methods in ordinary atmosphere. Since this development, silicon carbide has received great attention as one of the high temperature structural ceramic materials. Since the 1970s, many research papers have appeared which report studies of silicon carbide and silicon nitride for structural ceramics.
Download or read book Silicon Carbide and Related Materials 2005 written by Robert P. Devaty and published by Trans Tech Publications Ltd. This book was released on 2006-10-15 with total page 1670 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume is indexed by Thomson Reuters CPCI-S (WoS). Silicon Carbide (SiC), Gallium Nitride (GaN) and Diamond are examples of wide-bandgap semiconductors having chemical, electrical and optical properties which make them very attractive for the fabrication of high-power and high-frequency electronic devices, as well as light-emitters and sensors which have to operate under harsh conditions.
Download or read book Bibliography with Abstracts of AFCRL Publications from 1 January to 31 March 1972 written by Air Force Cambridge Research Laboratories (U.S.) and published by . This book was released on 1972 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: This bibliography lists all AFCRL in-house reports, journal articles, and contractor reports issued from 1 January to 31 March 1972. Abstracts are included.
Download or read book Bibliography on the High Temperature Chemistry and Physics of Materials written by and published by . This book was released on 1972 with total page 628 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 1995 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Properties and Applications of Silicon Carbide written by Rosario Gerhardt and published by BoD – Books on Demand. This book was released on 2011-04-04 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, we explore an eclectic mix of articles that highlight some new potential applications of SiC and different ways to achieve specific properties. Some articles describe well-established processing methods, while others highlight phase equilibria or machining methods. A resurgence of interest in the structural arena is evident, while new ways to utilize the interesting electromagnetic properties of SiC continue to increase.
Download or read book Nanomaterials Handbook written by Yury Gogotsi and published by CRC Press. This book was released on 2017-08-09 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt: This title features 11 new chapters unique to this edition, including chapters on grain boundaries in graphene, 2D metal carbides and carbonitrides, mechanics of carbon nanotubes and nanomaterials, biomedical applications, oxidation and purification of carbon nanostructures, sintering of nanoceramics, hydrothermal processing, nanofibers, and nanomaterials safety. It offers a comprehensive approach with a focus on inorganic and carbon-based nanomaterials, including fundamentals, applications, synthesis, and characterization. This book also provides a unique angle from the nanomaterial point of view on application, synthesis, and characterization not found in any other nanomaterials book on the market.
Download or read book Ceramic Materials and Components for Engines written by Jürgen G. Heinrich and published by John Wiley & Sons. This book was released on 2008-11-21 with total page 678 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several ceramic parts have already proven their suitability for serial application in automobile engines in very impressive ways, especially in Japan, the USA and in Germany. However, there is still a lack of economical quality assurance concepts. Recently, a new generation of ceramic components, for the use in energy, transportation and environment systems, has been developed. The efforts are more and more system oriented in this field. The only possibility to manage this complex issue in the future will be interdisciplinary cooperation. Chemists, physicists, material scientists, process engineers, mechanical engineers and engine manufacturers will have to cooperate in a more intensive way than ever before. The R&D activities are still concentrating on gas turbines and reciprocating engines, but also on brakes, bearings, fuel cells, batteries, filters, membranes, sensors and actuators as well as on shaping and cutting tools for low expense machining of ceramic components. This book summarizes the scientific papers of the 7th International Symposium "Ceramic Materials and Components for Engines". Some of the most fascinating new applications of ceramic meterials in energy, transportation and environment systems are presented. The proceedings shall lead to new ideas for interdisciplinary activities in the future.
Download or read book Silicon Carbide Ceramics written by Andrew J. Ruys and published by Elsevier. This book was released on 2023-01-22 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt: It has been three decades since the last significant book was published on SiC ceramics (other than those books that specifically focus on SiC semiconductors). Thirty years has been a long time in the world of SiC ceramics. In the early 1990s, SiC was still a relatively obscure ceramic even within the materials community, prominent only as an industrial abrasive (carborundum), and a refractory (Chapter 7). This has all changed dramatically in the 21st century. For example, As a semiconductor, SiC greatly surpasses silicon in performance, especially in high-power systems. Its market penetration since its launch in 2001 has been exponential. Single-crystal SiC semiconductors are covered in Chapter 3 Millions of military and paramilitary personnel have globally been protected with lightweight SiC body armour, since the late 1990s. Body armour is covered in Chapters 4 and 5 SiC–SiC is a composite material close to commercialization that makes possible high-temperature load-bearing applications hitherto only able to be hypothesized: from ultra-high-temperature jet turbine blades to advanced nuclear fuel encapsulation, the possibilities are very promising. Aerospace applications are covered in Chapter 9 Other key areas that are addressed are blast-resistant SiC vehicle/vessel armour in Chapter 8 and wear-resistant SiC ceramics in Chapter 6 Silicon Carbide Ceramics will be an essential reference resource for academic and industrial researchers and materials scientists and engineers working in ceramic materials for the semiconductor, defence, aerospace, wear resistance and refractory fields Presents an extensive review of the history, production and properties of SiC ceramics, including their characterization and applications Discusses classical and state-of-the-art sintering technologies for SiC ceramics Focuses on the future of ceramic manufacturing and advanced ceramic additive technologies
Download or read book Growth of Single Crystal Beta Silicon Carbide written by and published by . This book was released on 1992 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beta-SiC is a promising, wide bandgap material for high power electronic devices capable of operation at high temperatures. Its high saturation velocity, high breakdown electric field, and high thermal conductivity point to superior performance for high frequency applications. The successful fabrication of Beta-SiC devices requires high quality films to be epitaxially grown on lattice-matched substrate materials. Single crystals of Beta-SiC offer the optimum substrate material for lattice matching. The major problem to be overcome in the growth of large single crystals of Beta-SiC is polytype alpha-SiC formation. Cubic Beta-SiC crystallizes only below 2000 deg C. Above this temperature, SiC undergoes a phase transformation from the Beta-to the alpha-phase. In Phase I, we investigated two crystal growth techniques: sublimation and gas-vapor transport. We were able to grow small 3C-SiC crystals by both methods.
Download or read book Crystal Growth Technology written by Hans J. Scheel and published by John Wiley & Sons. This book was released on 2011-07-26 with total page 367 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiconductors and dielectrics are two essential materials found in cell phones and computers, for example, and both are manufactured by growing crystals. Edited by the organizers of the International Workshop on Crystal Growth Technology, this ready reference is essential reading for materials scientists, chemists, physicists, computer hardware manufacturers, engineers, and those working in the chemical and semiconductor industries. They have assembled an international team of experts who present the current challenges, latest methods and new applications for producing these materials necessary for the electronics industry using bulk crystal growth technology. From the contents: * General aspects of crystal growth technology * Compound semiconductors * Halides and oxides * Crystal growth for sustaining energy * Crystal machining
Download or read book Bibliography with Abstract s of AFCRL Publications from 1 July to 30 September 1970 written by Air Force Cambridge Research Laboratories (U.S.) and published by . This book was released on 1970 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 1016 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Diamond for Quantum Applications Part 2 written by and published by Academic Press. This book was released on 2020-10-15 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Diamond for Quantum Applications Part Two, Volume 104, the latest release in the Semiconductors and Semimetals series, highlights new advances in the field, with this new volume presenting interesting chapters on a variety of timely topics including Color center formation by deterministic single ion implantation, Diamond and Its Investigation by Advanced TEM, Fundaments of photo-electric readout of spin states in diamond, Integrated quantum photonic circuits with polycrystalline diamond, Diamond Membranes, and Diamond nanophotonic and opt mechanics. - Provides the authority and expertise of leading contributors from an international board of authors - Presents the latest release in the Semiconductors and Semimetals series - Updated release includes the latest information on the use of diamonds for quantum applications
