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Diffusion in Nanocrystalline Metals and Alloys—A Status Report
Author(s) -
Würschum R.,
Herth S.,
Brossmann U.
Publication year - 2003
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.200310079
Subject(s) - nanocrystalline material , materials science , diffusion , intergranular corrosion , grain boundary , amorphous solid , grain boundary diffusion coefficient , relaxation (psychology) , grain size , metallurgy , crystallography , nanotechnology , thermodynamics , alloy , microstructure , chemistry , psychology , social psychology , physics
Diffusion is a key property determining the suitability of nanocrystalline materials for use in numerous applications, and it is crucial to the assessment of the extent to which the interfaces in nanocrystalline samples differ from conventional grain boundaries. The present article offers an overview of diffusion in nanocrystalline metals and alloys. Emphasis is placed on the interfacial characteristics that affect diffusion in nanocrystalline materials, such as structural relaxation, grain growth, porosity, and the specific type of interface. In addition, the influence of intergranular amorphous phases and intergranular melting on diffusion is addressed, and the atomistic simulation of GB structures and diffusion is briefly summarized. On the basis of the available diffusion data, the diffusion‐mediated processes of deformation and induced magnetic anisotropy are discussed.