Strain Enhanced Diffusion
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Strain Enhanced Diffusion
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Author : Milan Radoje Vukcevich
language : en
Publisher:
Release Date : 1967
Strain Enhanced Diffusion written by Milan Radoje Vukcevich and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with Diffusion categories.
Strain Enhanced Diffusion In Gold
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Author : David N. Duhl
language : en
Publisher:
Release Date : 1964
Strain Enhanced Diffusion In Gold written by David N. Duhl and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1964 with categories.
Strain Enhanced Self Diffusion In Silver
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Author : Gordon Lloyd Fisher
language : en
Publisher:
Release Date : 1965
Strain Enhanced Self Diffusion In Silver written by Gordon Lloyd Fisher and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with categories.
Linking Deformation And Diffusion To Develop A Strain Speedometer
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Author : Naomi Barshi
language : en
Publisher:
Release Date : 2015
Linking Deformation And Diffusion To Develop A Strain Speedometer written by Naomi Barshi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
"I present the first comprehensive study of strain-enhanced diffusion in plagioclase through a multiscale, theoretical and physical approach. First I argue from first principles that diffusion and deformation are both processes of breaking and reforming bonds that take energy in order to proceed. Deformation can enhance diffusion by supplying strain energy that facilitates breaking bonds and by mobilizing dislocations, which can act as pathways for atomic migration. Widely-used geologic tools such as geochronometers and geothermobarometers neglect deformation-enhanced diffusion, which may lower closure temperatures and reset ages, temperatures, and pressures, leading to erroneous values calculated based on static diffusion or no diffusion after conditions of interest. If deformation enhancement of element mobility is measurable, we may be able to calculate and account for the effects of deformation on these calculations. The connection between deformation and diffusion also provides an opportunity to link deformation with a time-dependent process and infer strain rate. Strain rate is an integral parameter in understanding crustal deformation and cannot be directly determined from the rock record in most cases. To evaluate strain enhanced diffusion in a common rock forming mineral, I combined field-scale, thin-section scale, and grain-scale strain and chemical measurements for major and trace elements in naturally deformed plagioclase phenocrysts from the San José Pluton, Peninsular Ranges Batholith, México. The multiscale approach made it possible to connect grain-scale strain with bulk-rock deformation through methods I developed. I used high spatial resolution, sensitive, in situ analyses using electron probe micro-analysis (EPMA) and Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) to correlate changes in shape (strain) and chemical composition (element mobility). I conclude that at low strain and low compositional contrast between primary growth zones measured, the effect of strain-enhanced element mobility, as predicted from my model, is too subtle to quantify using available analytical techniques. This means that for such a set of conditions, a static diffusion model is sufficient, and geothermobarometers and geochronometers can still be applied to yield accurate results. Future work should explore the relationships between different variables affecting strain enhanced element mobility, such as thermal history, strain, strain rate, and starting compositions, to refine the applicability of existing tools and the potential for new ones." --
Solid State Diffusion Of Gold And Silver
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Author :
language : en
Publisher:
Release Date : 1967
Solid State Diffusion Of Gold And Silver written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with Gold categories.
Diffusion Atomic Ordering And Mass Transport
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Author : Jibamitra Ganguly
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Diffusion Atomic Ordering And Mass Transport written by Jibamitra Ganguly and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
One of the fundamental objectives of physical geochemistry is to understand the evolution of geochemical systems from microscopic to regional and global scales. At present there seems to be a general recognition of the fact that internal properties of minerals record important aspects of the evolutionary history of their host rocks which may be unraveled by very fine scale observations. A major focus in the development of geochemical research in the last thirty years has been the application of classical thermodynamics to reconstruct the conditions at which the states of quenched mineralogical properties of rocks have equilibrated during the course of their evolution. While these works have funda mentally influenced our understanding ofthe physico-chemical history ofrocks, in recent years petrologists, mineralogists, and geochemists have been making greater efforts towards the application of kinetic theories in order to develop a better appreciation of the temporal details of geochemical processes. The present volume brings together a variety of current research on transport in systems of geochemical interest from atomic to outcrop scales. A major theme is atomic migration or diffusion, and its various manifestations on microscopic and macroscopic scales. Transport in the solid state is controlled by diffusion and is responsible for the states of atomic ordering and relaxation of composi tional zoning in minerals, development of compositional zoning during cooling, exsolution lamellae, and creep.
Enhanced Diffusion In Shock Activated Be Al Interfaces
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Author :
language : en
Publisher:
Release Date : 1997
Enhanced Diffusion In Shock Activated Be Al Interfaces written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.
Enhanced diffusion of aluminum in shock activated beryllium has been observed. Cylindrical samples of aluminum coated beryllium rods were axisymetrically loaded up to 40 GPa and a total residual strain of up to 6.7%. The defect microstructure produced by both the shock wave and strain enabled the transport of aluminum in beryllium to exceed its equilibrium solid state saturation. This {open_quotes}super saturated{close_quotes} aluminum, upon heating exsolves out at relatively low temperatures and forms very strong interfaces with pressure mated components.
Analysis Of Enhanced Diffusivity In Nickel
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Author : Ahmed Rassem Wazzan
language : en
Publisher:
Release Date : 1962
Analysis Of Enhanced Diffusivity In Nickel written by Ahmed Rassem Wazzan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1962 with Nickel categories.
Diffusion In Silicon A Seven Year Retrospective
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Author : David J. Fisher
language : en
Publisher: Trans Tech Publications Ltd
Release Date : 2005-07-15
Diffusion In Silicon A Seven Year Retrospective written by David J. Fisher and has been published by Trans Tech Publications Ltd this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005-07-15 with Technology & Engineering categories.
This collection of abstracts of experimental and theoretical papers on the subject of diffusion in silicon is intended to complement earlier volumes (DDF153-155) which covered the previous decades work on the same topic. The abstracts are grouped according to the diffusing species in question. The latter comprise Ag, Al, As, Au, B, Ba, Be, C, Ca, Cl, Co, Cr, Cu, Er, F, Fe, Ge, H, He, Hf, In, Ir, K, Mg, Mn, Mo, N, Na, Nb, Ni, O, P, Pb, Pt, Rb, Sb, Se, Si, SiH3, Sn, Ti, V, Yb and Zn with regard to bulk diffusion, Ag, Au, Ba, Cl, Cu, Er, F, Ga, Ge, In, O, Pb, Sb, Si, SiH3, Sn and Y with regard to surface diffusion, H with regard to grain-boundary diffusion, and self-diffusion in liquid Si.
Defects And Diffusion Theory And Simulation Iii
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Author : David J. Fisher
language : en
Publisher: Trans Tech Publications Ltd
Release Date : 2012-01-03
Defects And Diffusion Theory And Simulation Iii written by David J. Fisher and has been published by Trans Tech Publications Ltd this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-01-03 with Technology & Engineering categories.
This volume on materials engineering comprises a collection of abstracts of recent scholarly papers and articles concerning a wide variety of topics related to the effects of structural defects and diffusion in many material areas, including thin-film manufacturing and facing metals.