Effect of Cr on high temperature oxidation of TiAl

被引：0
|
作者：
Dong Zi-qiang [1 ]
Jiang Hui-ren [1 ]
Feng Xiao-ran [1 ]
Wang Zhong-lei [1 ]
机构：
[1] Beijing Univ Aeronaut & Astronaut, Beijing 100083, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2006年 / 16卷
关键词：
TiAl; chromium; oxidation;
D O I：
暂无
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The oxidation behavior of TiAl-Cr(mole fraction of Cr:0-20%) was investigated at 1 173 K in air. The microstructure and composition of the oxide scale were studied by X-ray diffractometry(XRD), scanning electron microscopy(SEM) and electro-probe micro-analyses(EPMA). The results show that with the addition of Cr content from 0 to 8%, the oxidation resistance decreases, especially at 3%, which is mainly attributed to the doping effect of Cr3+. TiAl-Cr(mole fraction of Cr:15%-20%) has good oxidation resistance, and the protective alumina layer is preferentially formed on the surface of TiAl alloy, which is due to an increase of mote ratio of Al to Ti in TiAl-Cr alloys.
引用
收藏
页码：S2004 / S2008
页数：5
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