Download or read book Structure Thermodynamics and Diffusion Properties of Grain Boundaries and Interfaces written by Vladimir V. Popov and published by Trans Tech Publications Ltd. This book was released on 2015-07-29 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: The majority of materials, especially metals, are used in the form of polycrystals. It is well recognized that many properties of polycrystalline materials are determined by grain boundaries (GBs). Grain boundaries appreciably affect many practically important mechanical and physical properties of construction materials. Grain-boundary diffusion plays a key role in such practically important processes as Coble creep, sintering, diffusion induced grain boundary migration (DIGM), various discontinuous reactions, recrystallization and grain growth. The purpose of this Volume is to provide a collection of recent contributions in the field of structure, thermodynamics and diffusion properties of grain boundaries and interfaces. The Volume includes reviews of both experimental and theoretical studies carried out by well-recognized scientists whose publications are well-known and widely cited.

Download or read book Interfaces in Crystalline Materials written by Adrian P. Sutton and published by Oxford University Press, USA. This book was released on 1995 with total page 864 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of interfaces within and between materials is a central field which is relevant to almost all aspects of materials science. For example, interfaces play a role in many of the mechanical and electrical properties of materials, phase transformations, and microstructure of materials. This book is intended to serve as a graduate text consisting of four inter-related parts spanning the structure, thermodynamics, kinetics, and properties of interfaces in crystalline materials. Throughout the book emphasis is placed on the conceptual foundations of the subject through the exposition of simple models and descriptions of key experimental observations. In this way the reader is gradually taken to the forefront of the subject. The first four chapters deal with structural aspects of interfaces-interfacial geometry, dislocation models, interatomic forces, and atomic structure. There are three chapters dealing with thermodynamic aspects of interfaces; the thermodynamics of interfaces; interfacial phases and phase transitions, and segregation of solute atoms. The kinetics of interfaces are covered in three chapters concerned with diffusion, conservative motion, and non-conservative motion. Finally there are two chapters which cover the electrical and mechanical properties of interfaces. This book is a unique introduction to the field of interfaces in crystalline materials spanning the subject in a coherent and pedagogical style. Book jacket.

Download or read book Grain Boundary Migration in Metals written by Gunter Gottstein and published by CRC Press. This book was released on 1999-06-17 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: The behavior of adjacent materials at the boundary where they meet is an essential aspect of creating new engineering materials. Grain Boundary Migration in Metals is an authoritative account of the physics of grain boundary motion, written by two highly respected researchers. They provide a comprehensive overview of current knowledge regarding the migration process and how it affects microstructure evolution, focusing their treatment exclusively on the properties and behavior of grain boundaries with well defined geometry and crystallography. With their emphasis on applications-such as the characterization of microstructure and texture, recrystallization, and grain growth-the authors effectively fill the gap between the physics of grain boundary motion and its engineering practicality. The need for better microstructural design motivates permanent thrust for research in the field, and continued rapid progress appears inevitable. Grain Boundary Migration in Metals provides a solid foundation in the phenomena and serves as a valuable reference for professionals in materials science, solid state physics, and any industry engaged in metals production and the heat treatment of metals and alloys.

Download or read book Molecular Dynamics Study of Grain Boundary Structure and Properties at High Temperatures written by Saryu Jindal Fensin and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis reports research involving the development and application of atomistic simulation methods to study the effects of high homologous temperatures on the structural, thermodynamic, kinetic and mechanical properties of grain boundaries in metals. In this work we study two different elemental systems, namely Ni and Cu, and consider a variety of grain boundary structures characterized by different misorientation angles, twist/tilt character and zero-temperature energies. A method to calculate the disjoining potential from molecular dynamics is developed and applied to grain boundaries in Ni. The disjoining potential characterizes the variation in grain-boundary free energy as a function of the width of a premelted interfacial layer. The MD method for the calculation of this property is applied to grain boundaries that display continuous premelting transitions, as well as a boundary characterized by a disordered atomic structure displaying a finite interfacial width at the melting temperature. We also develop analysis methods to characterize the change in the atomic structure of an asymmetric tilt grain boundary in elemental Cu as a function of temperature. This boundary is characterized by a potential-energy surface with multiple minima as a function of the relative translation of the grains parallel to the interface plane. The structure of this boundary is found to display both disordering and roughening with increasing temperature. The mobility was calculated at high homologous temperatures using a method based on the analysis of the random walk of the interface in equilibrium MD simulations. Finally, the temperature dependent response of this grain boundary to shear was investigated. The dynamical behavior of the boundary in response to an applied shear strain was observed to undergo qualitative changes as the temperature was increased above 700 K.A decrease in shear resistance of the grain boundaries as a function of temperature was characterized by a decrease in the critical shear stress, an upper bound for which was estimated to be roughly a factor of five lower at the melting temperature than at zero temperature.

Download or read book Diffusion and Thermodynamics of Materials written by Ji?í ?ermák and published by Trans Tech Publications Ltd. This book was released on 2007-03-15 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: The diffusion of atoms is an inherent feature of matter, and the rules which describe the phenomenon are important from both the purely practical and the theoretical perspectives: it is a major rate-controlling process in phase transformations, crystal growth, recrystallization and recovery, creep, sintering, surface treatment and many other situations. Being typically a non-equilibrium macroscopic phenomenon, diffusion can be properly described in terms of the thermodynamics of irreversible processes. At the same time, phenomenological diffusion characteristics represent the mean values of microscopic parameters and reflect the microscopic structure of matter. In the latter case, they contribute to providing a deeper understanding of the physical background to the observed behavior of matter in general. Volume is indexed by Thomson Reuters CPCI-S (WoS).

Download or read book Grain Boundaries and Interfaces written by P. Chaudhari and published by . This book was released on 1972 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Equilibrium Structure and Properties of Surfaces and Interfaces written by A. Gonis and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is almost self-evident that surface and interface science, coupled with the electronic structure of bulk materials, playa fundamental role in the understanding of materials properties. If one is to have any hope of understanding such properties as catalysis, microelectronic devices and contacts, wear, lubrication, resistance to corrosion, ductility, creep, intragranular fracture, toughness and strength of steels, adhesion of protective oxide scales, and the mechanical properties of ceramics, one must address a rather complex problem involving a number of fundamental parameters: the atomic and electronic structure, the energy and chemistry of surface and interface regions, diffusion along and across interfaces, and the response of an interface to stress. The intense need to gain an understanding of the properties of surfaces and interfaces is amply attested to by the large number of conferences and workshops held on surface and interface science. Because of this need, the fields of surface and interface science have been established in their own right, although their development presently lags behind that of general materials science associated with bulk, translationally invariant systems. There are good reasons to expect this situation to change rather dramatically in the next few years. Existing techniques for investigating surfaces and interfaces have reached maturity and are increasingly being applied to systems of practical relevance. New techniques are still being created, which drastically widen the scope of applicability of surface and interface studies. On the experimental side, new microscopies are bearing fruit.

Download or read book Grain Boundary Segregation in Metals written by Pavel Lejcek and published by Springer Science & Business Media. This book was released on 2010-07-20 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: Grain boundaries are important structural components of polycrystalline materials used in the vast majority of technical applications. Because grain boundaries form a continuous network throughout such materials, their properties may limit their practical use. One of the serious phenomena which evoke these limitations is the grain boundary segregation of impurities. It results in the loss of grain boundary cohesion and consequently, in brittle fracture of the materials. The current book deals with fundamentals of grain boundary segregation in metallic materials and its relationship to the grain boundary structure, classification and other materials properties.

Download or read book Interfaces in Materials written by James M. Howe and published by Wiley-Interscience. This book was released on 1997-02-27 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: A thorough exploration of the atomic structures and properties of the essential engineering interfaces—an invaluable resource for students, teachers, and professionals The most up-to-date, accessible guide to solid-vapor, solid-liquid, and solid-solid phase transformations, this innovative book contains the only unified treatment of these three central engineering interfaces. Employing a simple nearest-neighbor broken-bond model, Interfaces in Materials focuses on metal alloys in a straightforward approach that can be easily extended to all types of interfaces and materials. Enhanced with nearly 300 illustrations, along with extensive references and suggestions for further reading, this book provides: A simple, cohesive approach to understanding the atomic structure and properties of interfaces formed between solid, liquid, and vapor phases Self-contained discussions of each interface—allowing separate study of each phase transformation A comparative look at the different interfaces, including atomic structure and crystallography; anisotropy, roughening, and melting; interfacial stability and segregation; continuous and ledge growth models; and atomistic modeling An analysis of nearest-neighbor broken-bond results against thermodynamic and kinetic descriptions of the interfaces Problem sets at the end of each chapter, emphasizing the key concepts detailed in the text Spanning the fields of chemical, electrical and computer engineering, materials science, solid-state physics, and microscopy, Interfaces in Materials bridges a major gap in the literature of surface and interface science.

Download or read book Materials Issues for Generation IV Systems written by Véronique Ghetta and published by Springer Science & Business Media. This book was released on 2008-04-23 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: Global warming, shortage of low-cost oil resources and the increasing demand for energy are currently controlling the world's economic expansion while often opposing desires for sustainable and peaceful development. In this context, atomic energy satisfactorily fulfills the criteria of low carbon gas production and high overall yield. However, in the absence of industrial fast-breeders the use of nuclear fuel is not optimal, and the production of high activity waste materials is at a maximum. These are the principal reasons for the development of a new, fourth generation of nuclear reactors, minimizing the undesirable side-effects of current nuclear energy production technology while increasing yields by increasing operation temperatures and opening the way for the industrial production of hydrogen through the decomposition of water. The construction and use of such reactors is hindered by several factors, including performance limitations of known structural materials, particularly if the life of the projected systems had to extend over the periods necessary to achieve low costs (at least 60 years). This book collects lectures and seminars presented at the homonymous NATO ASI held in autumn 2007 at the Institut d’Etudes Scientifiques in Cargèse, France. The adopted approach aims at improving and coordinating basic knowledge in materials science and engineering with specific areas of condensed matter physics, the physics of particle/matter interaction and of radiation damage. It is our belief that this methodology is crucially conditioning the development and the industrial production of new structural materials capable of coping with the requirements of these future reactors.

Download or read book Grain Boundaries and Interfaces written by Praveen Chaudhari and published by North-Holland. This book was released on 1972-01-01 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Structural Thermodynamics of Alloys written by J. Manenc and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Technical progress has for a very long time been directly dependent on progress in metallurgy, which is itself connected with improvements in the technology of alloys. Metals are most frequently used in the form of alloys for several reasons: the quantity of pure metal in its native state in the earth's crust is very limited; pure metals must be extracted from ores which are themselves impure. Finally, the methods of treatment used lead more easily to alloys than to pure metals. The most typical case is that of iron, where a pure ore may be found, but which is the starting point for cast iron or steel, alloys of iron and carbon. In addition, the properties of alloys are in general superior to those of pure metals and modem metallurgy consists of controlling these properties so as to make them conform to the requirements of the design office. Whilst the engineer was formerly compelled to adapt his designs and constructions to the materials available, such as wood, stone, bronze, iron, cast iron and ordinary steels, he can now expect, due to metallurgical research, the creation of special alloys meeting specific requirements. These requirements must of course be reasonable, but VIII INTRODUCTION must be sufficiently imperative for them to become the motive for progress.

Download or read book Structure and Properties of Materials Thermodynamics of structure by J H Brophy R M Rose and J Wulff written by John Wulff and published by . This book was released on 1964 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Materials Interfaces written by D. Wolf and published by Springer Science & Business Media. This book was released on 1992-10-31 with total page 748 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many of the most important properties of materials in high-technology applications are strongly influenced or even controlled by the presence of solid interfaces. In this work, leading international authorities review the broad range of subjects in this field focusing on the atomic level properties of solid interfaces.

Download or read book Surfaces and Interfaces in Ceramic and Ceramic Metal Systems written by Joseph Pask and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 733 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 17th University Conference on Ceramics, which also was the 7th LBL/MMRD International Materials Symposium, was held on the campus of the University of California at Berkeley from July 28 to August 1, 1980. It was devoted to the subject of surfaces and interfaces in ceramic and ceramic-metal systems. The program was timely and of great interest, as indicated by the large number of contributed papers, which included contributions from ten foreign countries. These proceedings are divided into the following categories dealing with the chemistry and physics of interfaces: calculations of interface/surface states, characterization of surfaces and inter faces, thermodynamics of interfaces, influence of surface and inter faces on selected ceramic processes, grain boundary structures, effects of grain boundaries on deformation and fracture, interfacial phenomena, formation of interfaces, development of adhesion, and reactions at interfaces. A number of papers deal specifically with the Si-Si02 interface, which probably has received more attention than any other because of its importance in the electronics industry. This coverage fulfills the principal objective of the symposium which was to explore and assess the current fundamental understand ing of interfaces and surfaces. A parallel objective of the symposium was fulfilled by a group of papers dealing with the correlation of interfacial characteris tics with mechanical behavior. This group includes papers dealing with the adherence of dissimilar materials at interfaces.

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:

Download or read book Collection of Items Related to the Cushing General Hospital Framingham Mass written by and published by . This book was released on 1944 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Cushing General Hospital was a military hospital, dedicated on January 24, 1944, to care for wounded WW II service men from New England. Over 13,800 soldiers had been treated in less than two years, many brought in ships from seaports in New England and transported by special train. The hospital was named after a pioneer in neurosurgery, Dr. Harvey Cushing who died in 1939, and consisted of almost 100 brick buildings. At the end of the war in 1946, Cushing General Hospital became a Veterans Administration Hospital administering to the Korean War wounded, but closed in 1953 with the construction of a new V. A. Hospital in Boston. The property was deeded to the Commomwealth of Massachusetts and a legislative Act in 1954 established Cushing Hospital. Under the Department of Mental Health the hospital was opened in 1957 after renovation and modernization. It was an accredited hospital and Medicare facility and closed in 1991. Fifty-seven acres of the original 110 acre plot is currently, 2011, managed by the Town of Framingham Dept. of Parks and Recreation as the Cushing Memorial Park. The park offers walking and passive recreation areas and includes the Framingham Peace and 9/11 Memorials. Cushing Memorial Chapel remains as one of the original buildings, now renovated and open for special services. Assisted living housing occupies thirty-six acres of the original site.