Niobium bulk and grain boundary diffusion in alpha-iron

被引：16
|
作者：
Herzig, C [1 ]
Geise, J [1 ]
Divinski, SV [1 ]
机构：
[1] Univ Munster, Inst Materialphys, D-48149 Munster, Germany
来源：
ZEITSCHRIFT FUR METALLKUNDE | 2002年 / 93卷 / 12期
关键词：
alpha-Fe; radiotracer diffusion; bulk diffusion of Nb in alpha-Fe; grain boundary diffusion of Nb in alpha-Fe;
D O I：
10.3139/146.021180
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Bulk and gram boundary (GB) diffusion of Nb in alpha-Fe were studied in the temperature interval from about 700 to 1100 K by the radiotracer method combined with serial sectioning. A non-Arrhenius temperature dependence of Nb bulk diffusion was established below the Curie temperature T-c. This observation was discussed in relation to the wellknown magnetically-induced diffusion anomaly in alpha-Fe and to the contribution of dislocation diffusion. In contrast, a practically linear Arrhenius temperature dependence was found for Nb GB diffusion. At T-c, bulk and GB diffusion of Nb are about one order of magnitude faster than the corresponding self-diffusivities of alpha-Fe. The effect of matrix purity on Nb GB diffusion in alpha-Fe was studied.
引用
收藏
页码：1180 / 1187
页数：8
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