Download or read book Modeling Transient and Three dimensional Fluid Flow and Transport Phenomena During the Growth of Electronic Crystals written by Jeffrey J. Derby and published by . This book was released on 1996 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advances in Computational Engineering Science written by Satya N. Atluri and published by . This book was released on 1997 with total page 1368 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A combined experimental and modeling study for the growth of SixGe1 x single crystals by liquid phase diffusion LPD written by Mehmet Yildiz (Ph. D.) and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Si,Ge,-, alloy is an emerging semiconductor material with many important potential applications in the electronic industry due to its adjustable physical, electronic and optical properties. It has been scrutinized for the fabrication of high-speed micro electronics (e.g., SiGe heterojunction bipolar transistors (HBT) and high electron mobility field effect transistors) and thermo-photovoltaics (e.g., photodetectors, solar cells, thermoelectric power generators and temperature sensor). Other applications of Si,Ge,-, include tuneable neutron and x-ray monochromators and y-ray detectors. In these applications, SixGel-, alloy is generally used in the form of epilayers that have to be deposited on a lattice-matched substrate (wafer). Therefore, SixGel-, bulk single crystals with a specific composition (x) are needed for the extraction of such wafers. LPEE (Liquid Phase Electroepitaxy) was considered as a technique of choice for the growth of single crystals. However, LPEE growth process needs a single crystal seed with the same composition as the crystal to be grown. Yet, such a seed substrate with particularly higher composition is not commercially available. In order to address this important issue in LPEE, a crystal growth technique, which is named "Liquid Phase Diffusion" (LPD), was developed and used to produce the needed seed substrate materials. This was the main motivation of the present research. This thesis presents a combined experimental and modelling study for LPD growth of compositionally graded, germanium-rich single crystals of 25 rnrn in diameter for use as lattice-matched seed substrates. The experimental part focuses on the design and development of a complete LPD grow system. The experimental set-up was tested by growing ten Si,Ge,-, single crystals. Grown crystals were characterized by macroscopic and microscopic examinations after chemical etching for delineation of the degree of . . . Abstract 111 single crystallinity and growth striations. Compositional mapping of selected crystals were performed by using Electron Probe Micro Analysis (EPMA) as well as Energy Dispersive X-ray analysis (EDX). It was shown that the LPD technique can be successfully utilized to obtain Si,Ge,-, single crystals up to 6-8 % at.Si with uniform radial composition distribution. The modeling part presents a rational continuum mixture model developed to study transport phenomena (heat and mass transfer, fluid flow) occurring during the LPD growth of Si,Ge,-, . Based on the continuum model developed, two and three-dimensional transient numerical simulations were carried out. The numerical simulation models presented account for some important physical features of the LPD growth process ofSi,Ge,-, , namely (1) a growth zone design on the thermal field, (2) the structure of the buoyancy induced convective flow and its effect on the growth and transport mechanisms, (3) the shape and evolution of the initial and progressing growth interfaces, and (4) the spatial and time variation of the crystal growth velocity. It was numerically shown that, as the name LPD implies, the growth of Si,Ge,-, by LPD is mainly a diffusion driven process except the initial stages of the growth process during which the natural convection in the solution zone is prominent and has significant effects on the composition of the grown crystal. The simulated evolution of the growth interface agrees with experimental observations. In addition, the numerical growth velocities are in good agreement with those of experiments. The numerical model developed can be used to study other crystal growth processes such as LPEE, Traveling Heater Method THM, and vertical Bridgman with slight modifications.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ASME Proceedings of the 7th AIAA ASME Joint Thermophysics and Heat Transfer Conference Heat and mass transfer in energy systems Heat transfer in turbomachinery Transport phenomena in manufacturing and materials processing Thermal management of electronics Advances in high heat flux heat transfer for electronics written by and published by . This book was released on 1998 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Numerical Modeling of Interface Dynamics and Transport Phenomena in Transport limited Electrolysis Processes written by Wanida Pongsaksawad and published by . This book was released on 2006 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: (Cont.) A new stability criterion for metal reduction in a liquid-liquid system is derived and agrees well with the model results. Next, the phase field model is extended for a ternary system to model titanium reduction in a supported electrolyte system. The model can simulate phase boundaries migration depending on the composition of the electrolyte and also electronically mediated reactions. Finally, Solid Oxide Membrane Electrolytic Smelting with Rotating Cathode (SOMERC), an emerging technology to electrolytically reduce titanium oxide from molten salt, is investigated. In the SOMERC process, rotational flow is introduced to create shear force that is expected to stabilize the interface. Computational fluid dynamics models of rotational flow are carried out to estimate the relationship between cathode rotational speed, shear strain rate, and boundary layer thicknesses. The phase field model presented in this thesis can be applied to any electrochemical reduction processes that are in the mass-transport controlled regime. Stability criteria and detailed morphology in two and three dimensions can be explored.

Download or read book Applied mechanics reviews written by and published by . This book was released on 1948 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Metals Abstracts written by and published by . This book was released on 1998 with total page 1076 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comprehensive Dissertation Index written by and published by . This book was released on 1989 with total page 1116 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 974 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Metals Abstracts Index written by and published by . This book was released on 1995 with total page 1390 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Journal of Heat Transfer written by and published by . This book was released on 2001 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Physics Briefs written by and published by . This book was released on 1994 with total page 1256 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2006 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Electrical Electronics Abstracts written by and published by . This book was released on 1997 with total page 2304 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Transport Phenomena in Food Processing written by Jorge Welti-Chanes and published by CRC Press. This book was released on 2016-04-19 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: Specifically developed for food engineers, this is an in-depth reference book that focuses on transport phenomena in food preservation. First it reviews the fundamental concepts regarding momentum, heat, and mass transfer. Then the book examines specific applications of these concepts into a variety of traditional and novel processes and products.

Download or read book Crystal Growth From Fundamentals to Technology written by Georg Müller and published by Elsevier. This book was released on 2004-07-07 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book contains 5 chapters with 19 contributions form internationally well acknowledged experts in various fields of crystal growth. The topics are ranging from fundamentals (thermodynamic of epitaxy growth, kinetics, morphology, modeling) to new crystal materials (carbon nanocrystals and nanotubes, biological crystals), to technology (Silicon Czochralski growth, oxide growth, III-IV epitaxy) and characterization (point defects, X-ray imaging, in-situ STM). It covers the treatment of bulk growth as well as epitaxy by anorganic and organic materials.