Download or read book Phase field Models for Simulating Physical Vapor Deposition and Microstructure Evolution of Thin Films written by James A. Stewart (Jr) and published by . This book was released on 2016 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: The focus of this research is to develop, implement, and utilize phase-field models to study microstructure evolution in thin films during physical vapor deposition (PVD). There are four main goals to this dissertation. First, a phase-field model is developed to simulate PVD of a single-phase polycrystalline material by coupling previous modeling efforts on deposition of single-phase materials and grain evolution in polycrystalline materials. Second, a phase-field model is developed to simulate PVD of a polymorphic material by coupling previous modeling efforts on PVD of a single-phase material, evolution in multiphase materials, and phase nucleation. Third, a novel free energy functional is proposed that incorporates appropriate energetics and dynamics for simultaneous modeling of PVD and grain evolution in single-phase polycrystalline materials. Finally, these phase-field models are implemented into custom simulation codes and utilized to illustrate these models' capabilities in capturing PVD thin film growth, grain and grain boundary (GB) evolution, phase evolution and nucleation, and temperature evolution. In general, these simulations show: grain coarsening through grain rotation and GB migration such that grains tend to align with the thin film surface features and GBs migrate to locations between these features so that each surface feature has a distinct grain and orientation; the incident vapor flux rate controls the density of the thin film and the formation of surface and subsurface features; the substrate phase distribution initially acts as a template for the growing microstructure until the thin film becomes sufficiently thick; latent heat released during PVD increases the surface temperature of the thin film creating a temperature gradient within the thin film influencing phase evolution and nucleation; and temperature distributions lead to regions within the thin film that allow for multiple phases to be stable and coexist. Further, this work shows the sequential approach for coupling phase-field models, described in goals (i) and (ii) is sufficient to capture first-order features of the growth process, such as the stagnation of GBs at the valleys of the surface roughness, but to capture higher-order features, such as orientation gradients within columnar grains, the single free energy functional approach developed in goal (iii) is necessary.

Download or read book Evolution of Thin Film Morphology written by Matthew Pelliccione and published by Springer Science & Business Media. This book was released on 2008-01-29 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: The focus of this book is on modeling and simulations used in research on the morphological evolution during film growth. The authors emphasize the detailed mathematical formulation of the problem. The book will enable readers themselves to set up a computational program to investigate specific topics of interest in thin film deposition. It will benefit those working in any discipline that requires an understanding of thin film growth processes.

Download or read book Phase field method and integrated computing materials engineering written by Yu-Hong Zhao and published by Frontiers Media SA. This book was released on 2023-04-19 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental Observation and Computer Simulation of the Microstructure of Vapor Deposited Thin Films written by KH. Guenther and published by . This book was released on 1985 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The microstructure of thin films applied by conventional physical vapor deposition for use as optical coatings is columnar for most of the materials commonly used. This has been established for about a decade through numerous experimental observations employing microfractographical replication for use with high resolution transmission electron microscopes. Scanning electron microscopes are more useful investigating coating defects, the most remarkable of these defects being known as nodules. From fundamental considerations of nucleation and growth of thin films, the origin of both columns and nodules, and the dependence of their appearance on the deposition conditions, are discussed in some detail. A simple 2-D simulation model assuming very limited surface mobility of adatoms or admolecules shows striking similarities to peculiar properties of both columnar and nodular growth seen in actual investigations. Conclusions are drawn as to how the two types of microstructures described influence general thin film properties, but in particular as to how they influence possible laser damage mechanisms.

Download or read book Microstructure Sensitive Design for Performance Optimization written by Brent L. Adams and published by Butterworth-Heinemann. This book was released on 2012-12-31 with total page 425 pages. Available in PDF, EPUB and Kindle. Book excerpt: The accelerating rate at which new materials are appearing, and transforming the engineering world, only serves to emphasize the vast potential for novel material structure and related performance. Microstructure Sensitive Design for Performance Optimization (MSDPO) embodies a new methodology for systematic design of material microstructure to meet the requirements of design in optimal ways. Intended for materials engineers and researchers in industry, government and academia as well as upper level undergraduate and graduate students studying material science and engineering, MSDPO provides a novel mathematical framework that facilitates a rigorous consideration of the material microstructure as a continuous design variable in the field of engineering design. Presents new methods and techniques for analysis and optimum design of materials at the microstructure level Authors' methodology introduces spectral approaches not available in previous texts, such as the incorporation of crystallographic orientation as a variable in the design of engineered components with targeted elastic properties Numerous illustrations and examples throughout the text help readers grasp the concepts

Download or read book Phase Field Methods in Materials Science and Engineering written by Nikolas Provatas and published by John Wiley & Sons. This book was released on 2011-07-26 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive and self-contained, one-stop source discusses phase-field methodology in a fundamental way, explaining advanced numerical techniques for solving phase-field and related continuum-field models. It also presents numerical techniques used to simulate various phenomena in a detailed, step-by-step way, such that readers can carry out their own code developments. Features many examples of how the methods explained can be used in materials science and engineering applications.

Download or read book Phase field Modeling of Multi domain Evolution in Ferromagnetic Shape Memory Alloys and of Polycrystalline Thin Film Growth written by Christian Mennerich and published by KIT Scientific Publishing. This book was released on 2014-05-13 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: The phase-field method is a powerful tool in computer-aided materials science as it allows for the analysis of the time-spatial evolution of microstructures on the mesoscale. A multi-phase-field model is adopted to run numerical simulations in two different areas of scientific interest: Polycrystalline thin films growth and the ferromagnetic shape memory effect. FFT-techniques, norm conservative integration and RVE-methods are necessary to make the coupled problems numerically feasible.

Download or read book Programming Phase Field Modeling written by S. Bulent Biner and published by Springer. This book was released on 2017-01-25 with total page 411 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook provides a fast-track pathway to numerical implementation of phase-field modeling—a relatively new paradigm that has become the method of choice for modeling and simulation of microstructure evolution in materials. It serves as a cookbook for the phase-field method by presenting a collection of codes that act as foundations and templates for developing other models with more complexity. Programming Phase-Field Modeling uses the Matlab/Octave programming package, simpler and more compact than other high-level programming languages, providing ease of use to the widest audience. Particular attention is devoted to the computational efficiency and clarity during development of the codes, which allows the reader to easily make the connection between the mathematical formulism and the numerical implementation of phase-field models. The background materials provided in each case study also provide a forum for undergraduate level modeling-simulations courses as part of their curriculum.

Download or read book An Improved Model of Thin Film Growth written by David J. Doryland and published by . This book was released on 1985 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: A VAX-11/785 computer was used to simulate the two dimensional growth of thin films produced by vapor deposition. In this model molecules and impurities were represented by three different sized disks. In order to simulate varying deposition conditions and evaporants, several variable parameters were introduced. Among these parameters were the variation of the deposition angle about some main angle, the mobility of the disks upon collision, the ability to introduce impurities into the microstructure, the simulation of multilayered coatings and the ability to introduce imperfections into the substrate. The results obtained by this model show that disks can be used to simulate some of the main features exhibited by vapor deposited films. Among these features are the formation of columns and their compliance with the tangent rule, and the dissappearance of this structure in the case of large disk mobility. Another feature found to be exhibited in the modeled films is that under certain conditions impurities and substrate imperfections can produce large voids and/or nodules. Other characteristics found in the simulated films include pores which could allow water absorption, and increased packing density for films produced with angle variations along with a moderate amount of disk mobility.

Download or read book Annual Review of Materials Research written by and published by . This book was released on 2002 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quantitative Phase field Model for Phase Transformations in Multi component Alloys written by Abhik Narayan Choudhury and published by Karlsruher Institut Fur Technologie. This book was released on 2014-05-13 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phase-field modeling has spread to a variety of applications involving phase transformations.While the method has wide applicability, derivation of quantitative predictions requires deeper understanding of the coupling between the system and model parameters. The book highlights a novel phase-field model based on a grand-potential formalism allowing for an elegant and efficient solution to problems in phase transformations.

Download or read book Handbook of Deposition Technologies for Films and Coatings written by Peter M. Martin and published by William Andrew. This book was released on 2009-12-01 with total page 932 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 3e, edited by Peter M. Martin, PNNL 2005 Inventor of the Year, is an extensive update of the many improvements in deposition technologies, mechanisms, and applications. This long-awaited revision includes updated and new chapters on atomic layer deposition, cathodic arc deposition, sculpted thin films, polymer thin films and emerging technologies. Extensive material was added throughout the book, especially in the areas concerned with plasma-assisted vapor deposition processes and metallurgical coating applications.

Download or read book Phase field Model for Compositional and Morphological Evolution Studies in Thin Film Heteroepitaxial Systems written by Nitin Singh and published by . This book was released on 2008 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: The initial focus of the dissertation is on the development of a diffuse-interface model for simulating microstructural evolution in a InxGa 1-xAsySb1-y alloy thin film-substrate system. The regions of instability are mapped on the phase diagram using the regular solution model. The influence of compositional strain and epitaxial strains on microstructure evolution is investigated. The model is further extended to simulate surface morphological evolution and coupled morphology-composition effects. The strain energy in the system is calculated by solving the Cauchy-Navier equations for equilibrium using a linear multigrid method. Generalized nonlinear Cahn-Hilliard equations are used to describe the evolution of the phase-field variables, which are solved using a nonlinear multigrid method. The model is used to investigate the influence of the sign of compositional strain and of the epitaxial mismatch on the arrangement of the equilibrium phases within the film. These studies indicate the possibility of compositional self-assembly processes in addition to morphological self-assembly.

Download or read book Principles of Vapor Deposition of Thin Films written by Professor K.S. K.S Sree Harsha and published by Elsevier. This book was released on 2005-12-16 with total page 1173 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of producing devices that are smaller, faster, more functional, reproducible, reliable and economical has given thin film processing a unique role in technology. Principles of Vapor Deposition of Thin Films brings in to one place a diverse amount of scientific background that is considered essential to become knowledgeable in thin film depostition techniques. Its ultimate goal as a reference is to provide the foundation upon which thin film science and technological innovation are possible. * Offers detailed derivation of important formulae. * Thoroughly covers the basic principles of materials science that are important to any thin film preparation. * Careful attention to terminologies, concepts and definitions, as well as abundance of illustrations offer clear support for the text.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reactive Sputter Deposition written by Diederik Depla and published by Springer Science & Business Media. This book was released on 2008-06-24 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this valuable work, all aspects of the reactive magnetron sputtering process, from the discharge up to the resulting thin film growth, are described in detail, allowing the reader to understand the complete process. Hence, this book gives necessary information for those who want to start with reactive magnetron sputtering, understand and investigate the technique, control their sputtering process and tune their existing process, obtaining the desired thin films.

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: