Grain Boundary Diffusion. Effect of Segregation or Concentration Dependence of Diffusivity.

被引：0

作者：

Alexey, Rodin ^{[1
]}

Nicolai, Dolgopolov ^{[1
]}

Sergei, Kryukov ^{[1
]}

机构：

[1] Natl Univ Sci & Technol MISIS, Moscow, Russia

来源：

DIFFUSION IN MATERIALS - DIMAT 2011 | 2012年 / 323-325卷

关键词：

grain boundary diffusion; segregation; concentration dependence; CU; AL;

D O I：

10.4028/www.scientific.net/DDF.323-325.165

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Effect of microalloying of Al by Ce on Cu grain boundary diffusion (GBD) in Al and other results of GBD study in metals with different purity were analyzed. It is shown that in dependence on the chemical composition of the matrix the triple product of GB diffusion can be higher or less than that for pure metals. The main concept used for description of the results is local ordering of the atoms (including atomic complex formation and appearance of "poisonous" places around atoms of the alloying element). The increasing of atom mobility at GB is discussed also in terms of solidus temperature changes.

引用

页码：165 / 170

页数：6

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