Download or read book Phase Stability in Metallic Multilayers written by Arda Genc and published by . This book was released on 2008 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: As the thin film materials used in electronic and optical applications continue to decrease in thickness to the nanoscales, marked changes in functional properties are expected to occur due to changes in crystal structure of these materials. Therefore, such multilayer systems have been of considerable interest due to the ability to control properties by engineering the structure of materials at the nanoscales. The new characterization tools allow direct imaging and analysis of such materials in order to link the performance variations with the crystal structure variations. Recently, there have been remarkable advances in aberration corrected column design of electron microscopes, which eventually led to sub-Angstrom (

Download or read book Phase Stability and Deformation Behavior of Nanostructured Copper Based Multilayers written by Qianying Guo and published by . This book was released on 2018 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: As metallic multilayers exhibit large surface area-to-volume ratios, their physical and chemical properties can be size dependent. These size dependent changes facilitate both crystallographic phase transformations as well as alternations in deformation mechanisms. These topics were studied using a series of Cu based thin film architectures, where Cu was deposited between either crystalline phases, i.e. Nb or V for phase stability studies, or glassy phase, i.e. Cu45Zr55, for deformation studies. The phase stability of all the layers were monitored through real time stress measurements during the growth of the films coupled with post growth characterization methods including X-ray diffraction (XRD), transmission electron microscopy (TEM), and atom probe tomography (APT). Face centered cubic (fcc) phase transformation was detected in both multilayered systems, explained by the reduction of interfacial energy. An additional vitrification phase transformation was observed in the crystalline and Cu/Nb system owing to clusters formations at the interfaces. For the in situ deformation studies, the crystalline Cu/ amorphous Cu45Zr55 multilayers were studied by indentation and high cycle fatigue in the TEM. Precession electron diffraction (PED) quantified the grain size, grain misorientation and texture. Grain rotation, facilitated by the free surface of the TEM foil, and grain growth, were observed to be primary deformation mechanisms in the crystalline layers of the multilayers.

Download or read book Phase Stability in Metals and Alloys written by Battelle Memorial Institute and published by . This book was released on 1967 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Microstructural and Phase Stability Studies of Nanometer Period Metal carbon Multilayer Structures for X ray Optics written by Tai Dung Nguyen and published by . This book was released on 1990 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Structural and Phase Stability of Alloys written by J. L. Morán-López and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt: This vohune contains the papers presented at the Adriatico Research Conference on Structural and Phase Stability of Alloys held in Trieste, Italy, in May 1991, under the auspices of the International Centre for Theoretical Physics. The conference brought together participants with a variety of interests in theoretical and experimental aspects of alloys from Argentina, Belgium, Bulgaria, Czechslovakia, France, Germany, Italy, Japan, Mexico, People's Republic of Congo,Portugal, Switzerland, United Kingdom, United States, U. S. S. R. , and Venezuela. The conference was purposely designed to succinctly cover experimental and the oretical aspects of magnetic and non-magnetic alloys, surfaces, thin films and nanos tructures. The Conference opened with an overview of a select class of advanced structural materials, with a potential in engineering applications, for which the con ventional "physics" approach, both theoretical and experimental, should have a sig nificant impact. A number of papers were dedicated to the use of phenomenological approaches for the description of thermodynamic bulk and surface properties. It was clear from these presentations that the phenomenological models and simulations in alloy theory have reached a high degree of sophistication. Although with somewhat limited predictive powers, the phenomenological models provide a valuable tool for the understanding of a variety of subtle phenomena such as short-range order, phase stability, kinetics and the thermodynamics of surfaces and antiphase boundaries, to name a few.

Download or read book Metallic Multilayers written by A. Chamberod and published by . This book was released on 1989 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains a series of lectures given in a Summer School held in Aussois (France) in September 1989. It offers a global perspective on the current state-of-the-art in the rapidly emerging field of metallic multilayered structures.

Download or read book Alloy Phase Stability written by G.M. Stocks and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the ultimate goals of materials research is to develop a fun damental and predictive understanding of the physical and metallurgical properties of metals and alloys. Such an understanding can then be used in the design of materials having novel properties or combinations of proper ties designed to meet specific engineering applications. The development of new and useful alloy systems and the elucidation of their properties are the domain of metallurgy. Traditionally, the search for new alloy systems has been conducted largely on a trial and error basis, guided by the skill and intuition of the metallurgist, large volumes of experimental data, the principles of 19th century thermodynamics and ad hoc semi-phenomenological models. Recently, the situation has begun to change. For the first time, it is possible to understand the underlying mechanisms that control the formation of alloys and determine their properties. Today theory can begin to offer guidance in predicting the properties of alloys and in developing new alloy systems. Historically, attempts directed toward understanding phase stability and phase transitions have proceeded along distinct and seemingly diverse lines. Roughly, we can divide these approaches into the following broad categories. 1. Experimental determination of phase diagrams and related properties, 2. Thermodynamic/statistical mechanical approaches based on semi phenomenological models, and 3. Ab initio quantum mechanical methods. Metallurgists have traditionally concentrated their efforts in cate gories 1 and 2, while theoretical physicists have been preoccupied with 2 and 3.

Download or read book Metallic Multilayers and their Applications written by Gayanath Fernando and published by Elsevier. This book was released on 2011-08-30 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thin Metallic multilayer films have become an important part in today's computer technology. The giant magnetoresistance (GMR) effect, which plays a central role here, was discovered in the late 1980s. This can be essentially described as the effect of a magnetic field on the electron transport leading to significant changes in the resistance. Other aspects of multilayers systems, such as stability, growth, confinement are also addressed. Theoretical and experimental methods used in such work are described in some detail, with special emphasis on density functional and spin density functional theories. Magnetic anisotropy in thin films is also discussed while addressing unresolved issues and new results from exchange-bias experiments. Discusses the GMR effect What makes multilayers interesting and useful? What are the latest discoveries in this field? Simple insights in to the physics behind multilayers Novel concepts at small length scales Theoretical and experimental background

Download or read book Thermal Stability and Reaction of Metallic Multilayers written by Constantin Buzau Ene and published by . This book was released on 2007 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Phase Transformations written by Srikumar Banerjee and published by Elsevier. This book was released on 2010-05-31 with total page 837 pages. Available in PDF, EPUB and Kindle. Book excerpt: The terms phase transitions and phase transformations are often used in an interchangeable manner in the metallurgical literature. In Phase Transformations, transformations driven by pressure changes, radiation and deformation and those occurring in nanoscale multilayers are brought to the fore. Order-disorder transformations, many of which constitute very good examples of continuous transformations, are dealt with in a comprehensive manner. Almost all types of phase transformations and reactions that are commonly encountered in inorganic materials are covered and the underlying thermodynamic, kinetic and crystallographic aspects elucidated. Shows readers the advancements in the field - due to enhanced computing power and superior experimental capability Drawing upon the background and the research experience of the authors, bringing together a wealth of experience Written essentially from a physical metallurgists view point

Download or read book Thermal Stability and Reaction of Metallic Multilayers written by and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Phase Transformations and Evolution in Materials written by Patrice E. A. Turchi and published by Minerals, Metals, & Materials Society. This book was released on 2000 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a collection of papers presented at the TMS Annual Meeting & Exhibition, held in Nashville, Tennessee, in March, 2000. The symposium emphasizes both theoretical and experimental aspects of phase transformations and evolutions in materials. Topics addressed in papers include: mechanical properties of structurally heterogeneous systems; simulations of structural transformations; large-scale modelling of microstructure evolution in martensites; applying the concentration wave method to predict ordering phenomena in substitutional alloys and ceramic materials; and use of the phase field method to study coherent transformations.

Download or read book Order and Phase Stability in Alloys written by F. Ducastelle and published by North Holland. This book was released on 1991 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hardbound. The main purpose of this book is to describe the modern tools of solid state physics (in particular, electronic structure calculations and statistical thermodynamics) that enable us to understand ordering effects in alloys and to determine phase diagrams. This approach is used more to throw light on the most important physical mechanisms rather than to be able to make accurate predictions suitable for particular applications. On the other hand, more phenomenological, practically oriented approaches can expand the scope of these new theoretical insights. A second purpose of the book is to show that materials science can provide wonderful and too often ignored examples to test and discuss the most fundamental physical theories. For example, many real alloys on a face centered cubic lattice are marvellous examples of the Ising model on this lattice with many different ordered structures, commensurate or not.The text is therefore defi

Download or read book Statics and Dynamics of Alloy Phase Transformations written by Patrice E.A. Turchi and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 725 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of phase transformations in substitutional alloys, including order disorder phenomena and structural transformations, plays a crucial role in understanding the physical and mechanical properties of materials, and in designing alloys with desired technologically important characteristics. Indeed, most of the physical properties, including equilibrium properties, transport, magnetic, vibrational as well as mechanical properties of alloys are often controlled by and are highly sensitive to the existence of ordered compounds and to the occurrence of structural transformations. Correspondingly, the alloy designer facing the task of processing new high-performance materials with properties that meet specific industrial applications must answer the following question: What is the crystalline structure and the atomic configuration that an alloy may exhibit at given temperature and concentration? Usually the answer is sought in the phase-diagram of a relevant system that is often determined experimentally and does not provide insight to the underlying mechanisms driving phase stability. Because of the rather tedious and highly risky nature of developing new materials through conventional metallurgical techniques, a great deal of effort has been expended in devising methods for understanding the mechanisms contrOlling phase transformations at the microscopic level. These efforts have been bolstered through the development of fully ab initio, accurate theoretical models, coupled with the advent of new experimental methods and of powerful supercomputer capabilities.

Download or read book Metallic Alloys Experimental and Theoretical Perspectives written by J.S. Faulkner and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of new materials is recognized as one of the major elements in the overall technological evolution that must go on in order to sustain and even improve the quality of life for citizens of all nations. There are many components to this development, but one is to achieve a better understanding of the properties of materials using the most sophisticated scientific tools that are available. As condensed matter physicists and materials scientists work toward this goal, they find that it is useful to divide their efforts and focus on specific areas, because certain analytical and theoretical techniques will be more useful for the study of one class of materials than another. One such area is the study of metals and metallic alloys, which are used in the manufacture of products as diverse as automobiles and space stations. Progress in this area has been very rapid in recent years, and the new developments come from many different countries. For these reasons the Advanced Research Workshop Programme in the NATO Scientific Affairs Division has seen fit to sponsor several meetings to bring together the researchers and students working in this field from the NATO countries and elsewhere. There have been a series of NATO-ASI's that have dealt with the results of research on the electronic structure of materials and the properties of metals, alloys, and interfaces. They are: "Electrons in finite and infinite structures" P. Phariseau and L.

Download or read book Metallic Multi layers and Epitaxy written by M. Hong and published by American Society of Civil Engineers. This book was released on 1988 with total page 304 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 702 pages. Available in PDF, EPUB and Kindle. Book excerpt: