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Relationship between grain boundary diffusion in nanocrystals and amorphous microstructure
Author(s) -
Sun Linlin,
Wang Jun,
Kou Hongchao,
Li Jinshan,
Zhang Pingxiang
Publication year - 2016
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.6044
Subject(s) - microstructure , nanocrystal , materials science , amorphous solid , diffusion , transmission electron microscopy , grain boundary , grain boundary diffusion coefficient , amorphous metal , alloy , atmospheric temperature range , analytical chemistry (journal) , metallurgy , crystallography , chemistry , thermodynamics , nanotechnology , physics , chromatography
The effects of microstructure on diffusion behaviors of Ni in Zr 48 Cu 36 Ag 8 Al 8 alloy were investigated by transmission electron microscope and secondary ion mass spectrum. The temperature dependence of Ni diffusivities in Zr 48 Cu 36 Ag 8 Al 8 alloy with different states (metallic glass, nanocrystals and coarse crystals) has been measured in the temperature range of 693–723 K. The results show that diffusion behavior is microstructure dependence, and the relations between the microstructure and diffusion are discussed. The activity energy of the grain boundary diffusion in nanocrystals calculated by the Suzuoka solution is about 1.433 eV/atom. It is equivalent with that of metallic glass, which is attributed to the similar microstructure between the two. Copyright © 2016 John Wiley & Sons, Ltd.