TY - JOUR
T1 - Influences of elastic stress and interfacial kinetic barrier on phase evolution paths of thin-film diffusion couples
AU - Huh, Joo Youl
AU - Hong, Jong Pa
N1 - Publisher Copyright:
© (2006) Trans Tech Publications, Switzerland.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2006
Y1 - 2006
N2 - An explicit, finite difference scheme was used to examine the effects of coherency stresses and interface kinetic barriers on the phase evolution of a binary, thin-film diffusion couple. Thin-films, initially consisting of alternating layers of two terminal phases, α and γ, were held at a temperature at which the formation of an intermediate phase, β, at α/γ interface was thermodynamically probable. When either the coherency stresses or interface kinetic barriers are present, the interfacial compositions become time-dependent and, thus, the formation of the thermodynamically stable β phase can be kinetically prohibited at the early stage of the evolution. Even if the initial α/γ thin-films have the same overall composition, the coherency constraint can result in different final equilibrium states depending on either the initial compositions of the α and γ phases or the relative magnitudes of the interfacial kinetic barriers. When both the coherency constraint and interfacial kinetic barriers are present, an intermediate phase can repeatedly form and disappear during the evolution.
AB - An explicit, finite difference scheme was used to examine the effects of coherency stresses and interface kinetic barriers on the phase evolution of a binary, thin-film diffusion couple. Thin-films, initially consisting of alternating layers of two terminal phases, α and γ, were held at a temperature at which the formation of an intermediate phase, β, at α/γ interface was thermodynamically probable. When either the coherency stresses or interface kinetic barriers are present, the interfacial compositions become time-dependent and, thus, the formation of the thermodynamically stable β phase can be kinetically prohibited at the early stage of the evolution. Even if the initial α/γ thin-films have the same overall composition, the coherency constraint can result in different final equilibrium states depending on either the initial compositions of the α and γ phases or the relative magnitudes of the interfacial kinetic barriers. When both the coherency constraint and interfacial kinetic barriers are present, an intermediate phase can repeatedly form and disappear during the evolution.
KW - Coherency stresses
KW - Interfacial kinetic barrier
KW - Numerical simulation
KW - Phase evolution path
KW - Thin-film diffusion couple
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U2 - 10.4028/www.scientific.net/SSP.118.405
DO - 10.4028/www.scientific.net/SSP.118.405
M3 - Article
AN - SCOPUS:84983614138
SN - 1012-0394
VL - 118
SP - 405
EP - 412
JO - Solid State Phenomena
JF - Solid State Phenomena
ER -