Effect of Cr on high temperature oxidation of TiAl

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 a...

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Bibliographic Details
Published inTransactions of Nonferrous Metals Society of China Vol. 16; no. A03; pp. 2004 - 2008
Main Author 董自强 姜惠仁 冯晓然 王中雷
Format Journal Article
LanguageEnglish
Published School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China 01.12.2006
Subjects
X光线衍射
金属化合物
高温氧化
oxidation
chromium
TiAl
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Summary: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 Cr^3＋. TiAI-Cr（mole fraction of Cr： 15%-20%） has good oxidation resistance, and the protective alumina layer is preferentially formed on the surface of TiAI alloy, which is due to an increase of mole ratio of Al to Ti in TiAl-Cr alloys.
Bibliography:oxidation
chromium
43-1239/TG
TiAl; chromium; oxidation
TG144
TiAl
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1003-6326