ESTIMATION OF THE GRAIN-BOUNDARY COVERAGE OF SEGREGATED IMPURITIES FROM THE KINETICS OF FREE-SURFACE SEGREGATION

被引：6

作者：

MENYHARD, M

机构：

[1] Research Institute for Technical Physics of HAS, Budapest, H-1325

来源：

SURFACE AND INTERFACE ANALYSIS | 1992年 / 19卷 / 1-12期

关键词：

D O I：

10.1002/sia.7401901114

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：

The bulk diffusion coefficient can be determined by measuring the kinetics of free surface segregation. In this paper it will be shown that if one chooses an appropriate temperature and time, the kinetics of free surface segregation mainly depend on the grain boundary diffusivity and the coverage of segregated impurity. In certain cases the grain boundary diffusion coefficient can be considered as known or at least constant and the relative grain boundary coverage can be determined. The average phosphorus coverage on the grain boundary of an Fe-P-C alloy will be studied in this way.

引用

页码：615 / 617

页数：3

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