High temperature oxidation behavior of Ti-Al-Nb ternary alloys

被引：50
作者：
Shen, Y [1 ]
Ding, XF
Wang, FG
Tan, Y
Yang, JM
机构：
[1] Dalian Univ Technol, Dept Mat Engn, Dalian 116024, Peoples R China
[2] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA
来源：
JOURNAL OF MATERIALS SCIENCE | 2004年 / 39卷 / 21期
关键词：
D O I：
10.1023/B:JMSC.0000044899.40687.a6
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The oxidation behavior of four Ti-Al-Nb ternary alloys with different microstructures were investigated at 1000 C using interrupted oxidation test in air. Alloys with single-phase gamma-TiAl, two-phase gamma-TiAl + alpha(2)-Ti3Al, multi-phase gamma-TiAl + alpha(2)-Ti3Al + Nb2Al and two-phase alpha(2)-Ti3Al + Nb2Al were prepared. The oxidation resistance of the Ti-Al-Nb ternary alloy at high temperature was found to be better than that of the binary Ti-Al alloy. Among the four Ti-Al-Nb ternary alloys, the gamma + alpha(2) two-phase alloy has the best oxidation resistance. The presence of Nb-enriched phase such as Nb2Al and Nb3Al decrease the oxidation resistance at elevated temperature presumably due to the formation of Nb2O5, which would accelerate the exfoliation of oxide. (C) 2004 Kluwer Academic Publishers.
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页码：6583 / 6589
页数：7
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