Phase separation in nanocrystalline alloys upon generation of nonequilibrium vacancies at grain boundaries

被引：0
|
作者：
Gapontsev, VL
Kesarev, AG
Kondrat'ev, VV
Ermakov, AE
机构：
[1] Ural State Vocat Pedag Univ, Ekaterinburg 620083, Russia
[2] Russian Acad Sci, Inst Met Phys, Ural Div, Sverdlovsk 620219, Russia
来源：
PHYSICS OF METALS AND METALLOGRAPHY | 2000年 / 89卷 / 05期
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D O I：
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中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The problem of the formation of a zone of phase separation in a nanograin is considered under conditions of generation of nonequilibrium vacancies at grain boundaries. Two time-spatial scales have been revealed, which characterize (i) the anomalous diffusion of the alloy components responsible for the appearance of a relatively narrow near-boundary region with a changed concentration of the alloy components and (ii) the normal-diffusion region extending through much larger distances from the boundary. The main features of the spatial distribution of the concentrational inhomogeneity near the boundary is analyzed.
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页码：430 / 434
页数：5
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