Effect of electric current on crystal orientation and its contribution to densification during spark plasma sintering

被引：19

作者：

Deng, Shenghua ^{[1
]}

Li, Ruidi ^{[1
]}

Yuan, Tiechui ^{[1
]}

Cao, Peng ^{[2
]}

机构：

[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China

[2] Univ Auckland, Dept Chem & Mat Engn, Private Bag 92019, Auckland 1142, New Zealand

来源：

MATERIALS LETTERS | 2018年 / 229卷

基金：

中国国家自然科学基金; 湖南省自然科学基金;

关键词：

Densification; Spark plasma sintering; Electric current; Crystal structure; Texture; POWDER; MECHANISM; COMPACTS;

D O I：

10.1016/j.matlet.2018.07.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In order to understand the underlying mechanisms of rapid densification during spark plasma sintering (SPS), the texture evolution of tungsten at different current densities was analyzed. It is found that texture of sample changes with current density under the same pressure and temperature. As the current density increases, the preferred orientation of tungsten crystal tend to rotate from (1 3 3) and (1 1 1) to (0 0 1), which is exactly a soft orientation and has the smallest deformation resistance. This current-induced rotation of crystal can be regarded as a non-thermal mechanism of electric current which contributes to the rapid densification of tungsten powder during SPS. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：126 / 129

页数：4

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