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Author : Joseph M. Parrette
Publisher :
ISBN 13 :
Total Pages : 124 pages
Book Rating : 4.:/5 (428 download)
Download or read book Numerical Simulation of the Growth of Aluminum Nitride written by Joseph M. Parrette and published by . This book was released on 1999 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 5 pages
Book Rating : 4.:/5 (684 download)
Download or read book Simulation of Transport Phenomena in Aluminum Nitride Single-Crystal Growth written by and published by . This book was released on 2002 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this project is to apply advanced computer-aided modeling techniques for simulating coupled radiation transfer present in the bulk growth of aluminum nitride (AlN) single-crystals. Producing and marketing high-quality single-crystals of AlN is currently the focus of Crystal IS, Inc., which is engaged in building a new generation of substrates for electronic and optical-electronic devices. Modeling and simulation of this company's proprietary innovative processing of AlN can substantially improve the understanding of physical phenomena, assist design, and reduce the cost and time of research activities. This collaborative work supported the goals of Crystal IS, Inc. in process scale-up and fundamental analysis with promising computational tools.
Author : Derek Endres
Publisher :
ISBN 13 :
Total Pages : 64 pages
Book Rating : 4.:/5 (631 download)
Download or read book Numerical Investigation of Pulsed Chemical Vapor Deposition of Aluminum Nitride written by Derek Endres and published by . This book was released on 2010 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The Metal Organic Vapor Phase Epitaxy (MOVPE) of Aluminum Nitride (AlN) results not only in the growth of an AlN thin film, but also in the growth of AlN particles suspended in the gas-phase. Particle formation of AlN is unique to the MOVPE of AlN because the bond strength of AlN (11.5eV) is much larger than that of other III-V materials. This study numerically examined the effect of pulsing the precursor gases on the MOVPE of AlN as a way to curb AlN particle formation, in both horizontal and vertical reactors. Pulsing parameters such as pulse width, pulse duration, and precursor gas flow rate were varied to see the effect on growth rate and particle formation. The numerical predictions show AlN particle formation decreases significantly as the length of carrier gas pulse width increases and the deposition rate of substrate AlN can stay at approximately the same value as the steady state value with increased precursor gas flow rates. Therefore, if pulsing is introduced with relatively large carrier gas pulse width and increased precursor gas flow rates the AlN particle formation would be minimized while keeping the growth rate more or less unaffected. Numerical results also showed that pulsing has the added benefit that it increased the average growth rate (compared to steady state growth rates) because the precursors are not wasted as particles.
Author : Nikolai Kolesnikov
Publisher : BoD – Books on Demand
ISBN 13 : 9533076100
Total Pages : 622 pages
Book Rating : 4.5/5 (33 download)
Download or read book Modern Aspects of Bulk Crystal and Thin Film Preparation written by Nikolai Kolesnikov and published by BoD – Books on Demand. This book was released on 2012-01-13 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt: In modern research and development, materials manufacturing crystal growth is known as a way to solve a wide range of technological tasks in the fabrication of materials with preset properties. This book allows a reader to gain insight into selected aspects of the field, including growth of bulk inorganic crystals, preparation of thin films, low-dimensional structures, crystallization of proteins, and other organic compounds.
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ISBN 13 :
Total Pages : 704 pages
Book Rating : 4.:/5 (31 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Publisher : Newnes
ISBN 13 : 0080932282
Total Pages : 3572 pages
Book Rating : 4.0/5 (89 download)
Download or read book Comprehensive Semiconductor Science and Technology written by and published by Newnes. This book was released on 2011-01-28 with total page 3572 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiconductors are at the heart of modern living. Almost everything we do, be it work, travel, communication, or entertainment, all depend on some feature of semiconductor technology. Comprehensive Semiconductor Science and Technology, Six Volume Set captures the breadth of this important field, and presents it in a single source to the large audience who study, make, and exploit semiconductors. Previous attempts at this achievement have been abbreviated, and have omitted important topics. Written and Edited by a truly international team of experts, this work delivers an objective yet cohesive global review of the semiconductor world. The work is divided into three sections. The first section is concerned with the fundamental physics of semiconductors, showing how the electronic features and the lattice dynamics change drastically when systems vary from bulk to a low-dimensional structure and further to a nanometer size. Throughout this section there is an emphasis on the full understanding of the underlying physics. The second section deals largely with the transformation of the conceptual framework of solid state physics into devices and systems which require the growth of extremely high purity, nearly defect-free bulk and epitaxial materials. The last section is devoted to exploitation of the knowledge described in the previous sections to highlight the spectrum of devices we see all around us. Provides a comprehensive global picture of the semiconductor world Each of the work's three sections presents a complete description of one aspect of the whole Written and Edited by a truly international team of experts
Author : Cortland O. Dugger
Publisher :
ISBN 13 :
Total Pages : 76 pages
Book Rating : 4.3/5 (91 download)
Download or read book The Single Crystal Synthesis and Some Properties of Aluminum Nitride written by Cortland O. Dugger and published by . This book was released on 1975 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: This final report, which covers the period from March 1972 to 30 June 1975, discusses some conditions for the synthesis of aluminum nitride (AIN) single crystals from solution. The solvent systems used are unique and novel. The average sized, water-white, bipyramidal AIN single crystals reproducibly grown from solution only were 1.1 mm long X 0.3 mm wide. The average sized, AIN single crystals grown from a combined solution-vapor reaction technique were 4mm long X 3 mm wide X 2mm thick. The in-house quantitative evaluation of the crystals was restricted to Laue patterns and emission spectrometry only. In Appendices A, B, C, and D, general discussions of solution growth, other AIN growth methods, some properties of AIN, and a very brief discussion of the newly emerging surface acoustic wave (SAW) device technology and why the use of AIN is considered a good electro-acoutic material in SAW devices are presented. (Author).
Author : Li Du
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (729 download)
Download or read book Bulk Crystal Growth, Characterization and Thermodynamic Analysis of Aluminum Nitride and Related Nitrides written by Li Du and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The sublimation recondensation crystal growth of aluminum nitride, titanium nitride, and yttrium nitride were explored experimentally and theoretically. Single crystals of these nitrides are potentially suitable as substrates for AlGaInN epitaxial layers, which are employed in ultraviolet optoelectronics including UV light-emitting diodes and laser diodes, and high power high frequency electronic device applications. A thermodynamic analysis was applied to the sublimation crystal growth of aluminum nitride to predict impurities transport (oxygen, carbon, and hydrogen) and to study the aspects of impurities incorporation for different growth conditions. A source purification procedure was established to minimize the impurity concentration and avoid degradation of the crystal's properties. More than 98% of the oxygen, 99.9% of hydrogen and 90% of carbon originally in the source was removed. The AlN crystal growth process was explored in two ways: self-seeded growth with spontaneous nucleation directly on the crucible lid or foil, and seeded growth on SiC and AlN. The oxygen concentration was 2 ~ 4 x 1018cm-3, as measured by secondary ion mass spectroscopy in the crystals produced by self-seeded growth. Crystals grown from AlN seeds have visible grain size expansion. The initial AlN growth on SiC at a low temperature range (1400°C ~1600°C) was examined to understand the factors controlling nucleation. Crystals were obtained from c-plane on-axis and off-axis, Si-face and C-face, as well as m-plane SiC seeds. In all cases, crystal growth was fastest perpendicular to the c-axis. The growth rate dependence on temperature and pressure was determined for TiN and YN crystals, and their activation energies were 775.8±29.8kJ/mol and 467.1±21.7kJ/mol respectively. The orientation relationship of TiN (001) [2 parallel vertical lines] W (001) with TiN [100] [2 parallel vertical lines] W [110], a 45° angle between TiN [100] and W [100], was seen for TiN crystals deposited on both (001) textured tungsten and randomly orientated tungsten. Xray diffraction confirmed that the YN crystals were rock-salt structure, with a lattice constant of 4.88[A with a circle above it]. Cubic yttria was detected in YN sample from the oxidation upon its exposed to air for limited time by XRD, while non-cubic yttria was detected in YN sample for exposures more than one hour by Raman spectra.
Author : Scott Coatney
Publisher :
ISBN 13 :
Total Pages : 142 pages
Book Rating : 4.:/5 (42 download)
Download or read book Sublimation Growth of Aluminum Nitride written by Scott Coatney and published by . This book was released on 1999 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Stefan Johann Rupitsch
Publisher : Springer
ISBN 13 : 3662575345
Total Pages : 566 pages
Book Rating : 4.6/5 (625 download)
Download or read book Piezoelectric Sensors and Actuators written by Stefan Johann Rupitsch and published by Springer. This book was released on 2018-07-26 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces physical effects and fundamentals of piezoelectric sensors and actuators. It gives a comprehensive overview of piezoelectric materials such as quartz crystals and polycrystalline ceramic materials. Different modeling approaches and methods to precisely predict the behavior of piezoelectric devices are described. Furthermore, a simulation-based approach is detailed which enables the reliable characterization of sensor and actuator materials. One focus of the book lies on piezoelectric ultrasonic transducers. An optical approach is presented that allows the quantitative determination of the resulting sound fields. The book also deals with various applications of piezoelectric sensors and actuators. In particular, the studied application areas are · process measurement technology, · ultrasonic imaging, · piezoelectric positioning systems and · piezoelectric motors. The book addresses students, academic as well as industrial reseachers and development engineers who are concerned with piezoelectric sensors and actuators.
Author : Tapan K. Gupta
Publisher : Springer Science & Business Media
ISBN 13 : 3642340768
Total Pages : 529 pages
Book Rating : 4.6/5 (423 download)
Download or read book Radiation, Ionization, and Detection in Nuclear Medicine written by Tapan K. Gupta and published by Springer Science & Business Media. This book was released on 2013-03-20 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book will serve as the definitive source of detailed information on radiation, ionization, and detection in nuclear medicine. It opens by considering fundamental aspects of nuclear radiation, including dose and energy, sources, and shielding. Subsequent chapters cover the full range of relevant topics, including the detection and measurement of radiation exposure (with detailed information on mathematical modelling); medical imaging; the different types of radiation detector and their working principles; basic principles of and experimental techniques for deposition of scintillating materials; device fabrication; the optical and electrical behaviors of radiation detectors; and the instrumentation used in nuclear medicine and its application. The book will be an invaluable source of information for academia, industry, practitioners, and researchers.
Author :
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ISBN 13 :
Total Pages : 348 pages
Book Rating : 4.3/5 (243 download)
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1992 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 974 pages
Book Rating : 4.F/5 ( download)
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 974 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Enrique J. Lavernia
Publisher : John Wiley & Sons
ISBN 13 : 1119908132
Total Pages : 613 pages
Book Rating : 4.1/5 (199 download)
Download or read book Metallic Powders for Additive Manufacturing written by Enrique J. Lavernia and published by John Wiley & Sons. This book was released on 2024-02-02 with total page 613 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metallic Powders for Additive Manufacturing Overview of successful pathways for producing metal powders for additive manufacturing of high-performance metallic parts and components with tailored properties Metallic Powders for Additive Manufacturing introduces the readers to the science and technology of atomized metal powders beyond empirical knowledge and the fundamental relationships among the chemistry, microstructure, and morphology of atomized metallic powders and their behavior during additive manufacturing. The text sets a foundation of the underlying science that controls the formation and microstructure of atomized metallic droplets, including the relations among the properties of metallic powders, their performance during the manufacturing processes, and the resulting products. Other topics covered include the influence of powder on defect formation, residual stress, mechanical behavior, and physical properties. The concluding two chapters encompass considerations of broader societal implications and overarching themes, including the exploration of alternative feedstock materials, economic analysis, and sustainability assessment. These chapters offer valuable perspectives on the prospective trajectory of the field. Written by a team of experienced and highly qualified professors and academics, Metallic Powders for Additive Manufacturing includes information on: Atomization techniques such as Vacuum Induction Gas Atomization (VIGA), Electrode Induction Melting Gas Atomization (EIMGA), and Plasma Rotating Electrode Process (PREP) Atomization science and technology, covering control of atomization parameters, powder size distribution, effect of processing variables, and theoretical models of atomization Heat transfer and solidification of droplets, covering nucleation, microstructure development, and important thermal and solidification conditions during atomization Atomization of Al, Fe, Ni, Co, Ti, and high entropy alloys, as well as composite powders for additive manufacturing, and guidelines for atomization equipment and powder handling Fundamental processing principles in a variety of metal additive manufacturing processes Powder characteristics and requirements for different additive manufacturing processes Effect of powder chemistry and physical characteristics on additive manufacturing processes, and the microstructure and properties of the built parts Evaluation of alternative feedstock sources for metal additive manufacturing, beyond gas atomized powder Economic and sustainability perspectives on powder production and additive manufacturing Metallic Powders for Additive Manufacturing is an excellent combination of rigorous fundamentals and a practice-oriented and forward-looking resource on the subject for materials scientists and practicing engineers seeking to understand, optimize, and further develop the field of powder production and additive manufacturing.
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ISBN 13 :
Total Pages : 1014 pages
Book Rating : 4.E/5 ( download)
Download or read book Metals Abstracts written by and published by . This book was released on 1999 with total page 1014 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Publisher : Gruppo Italiano Frattura
ISBN 13 : 8895940261
Total Pages : 821 pages
Book Rating : 4.8/5 (959 download)
Download or read book Proceedings of Fatigue Crack Paths (FCP 2003), Parma, Italy 2003 written by and published by Gruppo Italiano Frattura. This book was released on with total page 821 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : De Liang Chen
Publisher : Trans Tech Publications Ltd
ISBN 13 : 3038135968
Total Pages : 300 pages
Book Rating : 4.0/5 (381 download)
Download or read book China Postdoctoral Forum on Materials Science and Engineering written by De Liang Chen and published by Trans Tech Publications Ltd. This book was released on 2011-06-30 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: These peer-reviewed papers deal with the scientific and technical aspects of ceramic materials, metallic materials, alloys, polymers and computational materials science. The aim of the proceedings was to provide up-to-date data for scientists and engineers working in the materials field. The book will also be a good learning resource for graduate students in the related specialties of Chemistry and Materials Science. Volume is indexed by Thomson Reuters CPCI-S (WoS).
