Download or read book Full microstructure control through ion induced grain growth texturing and constrained deformation in thin metal films written by Matteo Seita and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Full Microstructure Control Through Ion Irradiation written by Seita Matteo and published by LAP Lambert Academic Publishing. This book was released on 2015-01-29 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: When the interaction between energetic ions and matter is properly engineered, the microstructure of thin metal films can be tailored to the extent that polycrystals are transformed into single crystals through selective grain growth. At this level of control, microstructure engineering resembles painting: using an energetic ion-beam as the "paintbrush" and the metal film as the "canvas," materials scientists can directly "paint" novel, functional materials.

Download or read book Artificially Induced Grain Alignment in Thin Films written by Vladimir Matias and published by Cambridge University Press. This book was released on 2014-06-05 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thin-film growth is a very old art and an established scientific field in materials science. For decades, growth of monocrystal-like films has been practiced by making use of epitaxy on monocrystalline substrates. In the quest for greater control of materials, the next level of achievement will be to grow well-oriented thin films on arbitrary substrates, i.e., without the need for monocrystalline substrates. That is the goal of artificially inducing grain alignment in thin films. Texturing methods show significant promise in fabricating technologically attractive grain-aligned films. However, over the last three decades a variety of methods for grain alignment have been demonstrated with varying degrees of success. The focus of this book is on physical vapor deposition methods for growth of inorganic thin films, with special attention paid to ion beam assisted deposition (IBAD) texturing. Topics include: milestones in IBAD texturing; IBAD texturing; IBAD long-length application and texturing by other techniques.

Download or read book Grain Growth in Nanocrystalline Metal Thin Films Under In Situ Ion Beam Irradiation written by A. T. Motta and published by . This book was released on 2007 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: In-situ observations in a transmission electron microscope (TEM) were used to study the microstructure evolution in metal Zr, Pt, Cu, and Au nanocrystalline thin films under ion-beam irradiation. Free-standing films were prepared by sputter deposition. Samples were irradiated in-situ at the Intermediate Voltage Electron Microscope (IVEM) at Argonne National Laboratory with Ar and Kr ions to fluences in excess of 1016 ion/cm2. As a result of irradiation, grain growth was observed in all samples using Bright Field (BF) imaging in the TEM. The average grain size increased monotonically with ion fluence until it reached a saturation value. Similarly to thermal grain growth, the ion-irradiation induced grain growth curves could be best fitted with curves of the type: Dn-;D0n=K?. The irradiations were done at temperatures ranging from 20 to 773 K. The results suggest the existence of three regimes with respect to irradiating temperature: (i) a purely thermal regime, which appears to start above the bulk coarse-grained recrystallization temperature, (ii) a thermally assisted regime where thermal diffusion and irradiation effects combine to increase the rate of grain growth relative to that resulting from either of these mechanisms alone, and (iii) an athermal regime (low-temperature regime) where irradiation can by itself cause grain growth. The transition temperature between the athermal regime and the thermally assisted regime depends on the material, but is in the range 0.14-0.22 times the melting point. The influence of the ion type was also investigated on Zr-Fe irradiated with 600 keV Kr ions versus 600 keV Ar ions.

Download or read book Grain Size Control written by T. Gladman and published by CRC Press. This book was released on 2020-11-26 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Grain Size Control provides an excellent account of the understanding of many matters concerning grains, grain structure, and grain growth in controlling the grain size of polycrystalline metals. It considers the application of the principles of grain growth.

Download or read book Grain growth behavior and efficient large scale simulations of recrystallization with the phase field method written by Vondrous, Alexander and published by KIT Scientific Publishing. This book was released on 2014-12-15 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book summarizes the found insights of grain growth behavior, of multidimensional decomposition for regular grids to efficiently parallelize computing and how to simulate recrystallization by coupling the finite element method with the phase-field method for microstructure texture analysis. The frame of the book is created by the phase-field method, which is the tool used in this work, to investigate microstructure phenomena.

Download or read book Mechanisms of Surface and Microstructure Evolution in Deposited Films and Film Structures written by John Sanchez, Jr and published by Cambridge University Press. This book was released on 2014-06-05 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: A wide variety of materials systems and deposition strategies have been developed to produce epitaxial and polycrystalline thin films. In particular, controlling the morphology and microstructure of metal films at the nanometer and/or micron scale has become crucial for applications such as giant magnetoresistive devices, contacts and diffusion barriers in integrated circuits and photovoltaics, and multilayer X-ray mirrors. This book, first published in 2001, focuses on the interactions between different mechanisms of microstructure evolution and film-growth conditions. Two sections of the volume, including a joint effort with Symposium R, Morphology and Dynamics of Crystal Surfaces in Molecular and Colloid Systems, highlight the fundamental mechanisms of epitaxial growth. Additional topics include: multilayers - stress in thin films; early stages of film growth - mechanical properties; texture in polycrystalline films; grain growth - barrier layers; and silicides and organic thin films - pulsed laser deposition.

Download or read book Ion induced Grain Growth in Multilayer and Coevaporated Metal Alloy Thin Films written by and published by . This book was released on 1990 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Irradiation experiments were conducted on multilayer (ML) and coevaporated (CO) thin films in order to examine the role that the heat of mixing ([Delta]H{sub mix}) has in ion-induced grain growth. Room temperature irradiations using 1.7 MeV Xe were performed in the High Voltage Electron Microscope at Argonne National Laboratory. The alloys studied (Pt-Ti, Pt-V, Pt-Ni, Au-Co and Ni-Al) spanned a large range of [Delta]H{sub mix} values. Comparison of grain growth rates between ML and CO films of a given alloy confirmed a heat of mixing effect. Differences in grain growth rates between ML and CO films scaled according to the sign and magnitude of [Delta]H{sub mix} of the system (with exception of the Pt-V system). Substantial variations in growth rates among CO alloy films experiencing similar irradiation damage demonstrated that a purely collisional approach is inadequate for describing ion-induced grain growth and consideration must also be given to material-specific properties. Results from CO alloy films were consistent with a thermal spike model of ion-induced grain growth. The grain boundary mobility was observed to be proportional to the thermal spike-related parameter, (F{sub D}2)/([Delta]H{sub coh}3), where F{sub D} is the deposited damage energy and [Delta]H{sub coh} is the cohesive energy.

Download or read book Microstructure Evolution in Metal Forming Processes written by J Lin and published by Elsevier. This book was released on 2012-07-09 with total page 409 pages. Available in PDF, EPUB and Kindle. Book excerpt: Monitoring and control of microstructure evolution in metal processing is essential in developing the right properties in a metal. Microstructure evolution in metal forming processes summarises the wealth of recent research on the mechanisms, modelling and control of microstructure evolution during metal forming processes.Part one reviews the general principles involved in understanding and controlling microstructure evolution in metal forming. Techniques for modelling microstructure and optimising processes are explored, along with recrystallisation, grain growth, and severe plastic deformation. Microstructure evolution in the processing of steel is the focus of part two, which reviews the modelling of phase transformations in steel, unified constitutive equations and work hardening in microalloyed steels. Part three examines microstructure evolution in the processing of other metals, including ageing behaviour in the processing of aluminium and microstructure control in processing nickel, titanium and other special alloys.With its distinguished editors and international team of expert contributors, Microstructure evolution in metal forming processes is an invaluable reference tool for metal processors and those using steels and other metals, as well as an essential guide for academics and students involved in fundamental metal research. - Summarises the wealth of recent research on the mechanisms, modelling and control of microstructure evolution during metal forming processes - Comprehensively discusses microstructure evolution in the processing of steel and reviews the modelling of phase transformations in steel, unified constitutive equations and work hardening in microalloyed steels - Examines microstructure evolution in the processing of other materials, including ageing behaviour in the processing of aluminium

Download or read book Investigating the Mechanical Behavior and Deformation Mechanisms of Ultrafine grained Metal Films Using Ex situ and In situ TEM Techniques written by Ehsan Izadi and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanocrystalline (NC) and Ultrafine-grained (UFG) metal films exhibit a wide range of enhanced mechanical properties compared to their coarse-grained counterparts. These properties, such as very high strength, primarily arise from the change in the underlying deformation mechanisms. Experimental and simulation studies have shown that because of the small grain size, conventional dislocation plasticity is curtailed in these materials and grain boundary mediated mechanisms become more important. Although the deformation behavior and the underlying mechanisms in these materials have been investigated in depth, relatively little attention has been focused on the inhomogeneous nature of their microstructure (particularly originating from the texture of the film) and its influence on their macroscopic response. Furthermore, the rate dependency of mechanical response in NC/UFG metal films with different textures has not been systematically investigated. The objectives of this dissertation are two-fold. The first objective is to carry out a systematic investigation of the mechanical behavior of NC/UFG thin films with different textures under different loading rates. This includes a novel approach to study the effect of texture-induced plastic anisotropy on mechanical behavior of the films. Efforts are made to correlate the behavior of UFG metal films and the underlying deformation mechanisms. The second objective is to understand the deformation mechanisms of UFG aluminum films using in-situ transmission electron microscopy (TEM) experiments with Automated Crystal Orientation Mapping. This technique enables us to investigate grain rotations in UFG Al films and to monitor the microstructural changes in these films during deformation, thereby revealing detailed information about the deformation mechanisms prevalent in UFG metal films.

Download or read book Menu International a Menu Guide and Directory written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Correlation Between Microstructure and Surface Structure Evolution in Polycrystalline Films written by Adriana Eleni Lita and published by . This book was released on 2000 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book GRAIN GROWTH AND PHASE FORMATION IN ION IRRADIATED METAL ALLOY THIN FILMS written by DALE EDWARD ALEXANDER and published by . This book was released on 1990 with total page 213 pages. Available in PDF, EPUB and Kindle. Book excerpt: heat-of-mixing released during irradiation.

Download or read book Grain Growth in Al 2 Cu Thin Films written by and published by . This book was released on 1991 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The grain size and grain growth kinetics in sputter deposited Al-2% Cu films on silicon substrates were determined by TEM for various film thicknesses and anneal times, temperatures and methods. Grain sizes were found to be typically lognormally distributed. The as- deposited grain size (d{sub o}) dependence on film thickness (TH) was found to be d{sub o} = C TH{sup {1/2}}, due to competitive grain growth during film formation. Annealed grain size (d) after Rapid Thermal Annealing (RTA) for time (t) at temperature (T) is described by the general equation d - do = C TH{sup 0.7} {l brace}t exp ( -[Delta]E{sub a}/kT){r brace}18, where [Delta]E{sub a} = 0.85 ev for 0.4 [mu]m films and [Delta]E{sub a} = 1.1 ev for 0.8 [mu]m films. Grain growth is largely saturated for these anneals. Grain growth is shown to be more extensive during RTA anneals than furnace annealing and more extensive in 0.4 [mu]m films than 0.8 [mu]m films for equivalent RTA cycles. The results are discussed in terms of models, simulations and previous results of grain growth in thin metal films. 21 refs., 4 figs.

Download or read book Grain Growth Behavior and Efficient Large Scale Simulations of Recrystallization with the Phase field Method written by Alexander Vondrous and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book summarizes the found insights of grain growth behavior, of multidimensional decomposition for regular grids to efficiently parallelize computing and how to simulate recrystallization by coupling the finite element method with the phase-field method for microstructure texture analysis. The frame of the book is created by the phase-field method, which is the tool used in this work, to investigate microstructure phenomena.

Download or read book Ion Beam Enhanced Grain Growth in Thin Films written by Harry Albert Atwater and published by . This book was released on 1987 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mechanisms of Surface and Microstructure Evolution in Deposited Films and Film Structures Volume 672 written by Jacques G. Amar and published by . This book was released on 2001-11-12 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: The MRS Symposium Proceeding series is an internationally recognised reference suitable for researchers and practitioners. This book, first published in 2001, focuses on the interactions between different mechanisms of microstructure evolution and film-growth conditions.