Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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Transactions of Nonferrous Metals Society of China

Vol. 24    No. 1    January 2014

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Role of Kirkendall effect in diffusion processes in solids

Materials Electrochemistry Group, ICEMS, Instituto Superior Técnico, Universidade de Lisbon,
Avenida Rovisco Pais 1, 1049-001 Lisboa, Portugal

Abstract:In the 1940s, KIRKENDALL showed that diffusion in binary solid solutions cannot be described by only one diffusion coefficient. Rather, one has to consider the diffusivity of both species. His findings changed the treatment of diffusion data and the theory of diffusion itself. A diffusion-based framework was successfully employed to explain the behaviour of the Kirkendall plane. Nonetheless, the complexity of a multiphase diffusion zone and the morphological evolution during interdiffusion requires a physico-chemical approach. The interactions in binary and more complex systems are key issues from both the fundamental and technological points of view. This paper reviews the Kirkendall effect from the circumstances of its discovery to recent developments in its understanding, with broad applicability in materials science and engineering.


Key words: Kirkendall effect; Kirkendall velocity; Kirkendall planes; diffusion couple technique; solid-state diffusion; interdiffusion

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

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