Influence of Limited Efficiency and Competition of Vacancy Sinks/Sources on the Diffusion-Controlled Intermediate Phase Growth

Abstract:

Kinetics and structural evolution of the intermediate phase layer formation during reactive diffusion is revisited. Main new input is an account of limited efficiency of vacancy sinks/sources at the moving interfaces and in the bulk, leading to nonequilibrium vacancy concentration gradients. Competition of the two types of vacancy sinks/sources is studied – K-sinks (providing Kirkendall lattice shift) and F-sinks (Frenkel-Kirkendall voids formation). Reactive diffusion with limited vacancy sources/sinks power in isothermal regime as well as in adiabatic SHS-regime is considered.

• Periodical: Diffusion Foundations (Volume 2)
• Pages: 141-158
• DOI: https://doi.org/10.4028/www.scientific.net/DF.2.141
• Online since: September 2014
• Authors: Andriy Gusak*, Semen Kornienko, Nadiya Storozhuk, Tetyana Zaporozhets
• Keywords: Kirkendall Voiding, Mean Migration Path Length, Nonequilibrium Vacancies Distribution, Reactive Diffusion

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