Grain-boundary diffusion of nickel in Cr-, Fe-, and Zr-modified Ni3Al intermetallic

被引：8
|
作者：
Cermák, J [1 ]
Ruzicková, J [1 ]
Pokorná, A [1 ]
机构：
[1] Acad Sci Czech Republ, Inst Phys Mat, CZ-61662 Brno, Czech Republic
来源：
INTERMETALLICS | 1999年 / 7卷 / 06期
关键词：
aluminides; miscellaneous; diffusion; grain boundaries; structure;
D O I：
10.1016/S0966-9795(98)00089-2
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Tracer grain-boundary diffusion of Ni-63 in slightly hypostoichiometric (x(Al) < 25 at.%) Ni3Al alloys containing several percents of Cr, Fe and Zr was studied using both serial sectioning and residual activity methods. Measurements of grain-boundary diffusivity P were carried out in the temperature interval 873-1273 K. It was found that the additions of Cr, Fe and Zr decrease the P and increase the activation enthalpy of Ni-63 grain-boundary diffusion. (C) 1999 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：725 / 730
页数：6
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