Nitridation of various superalloys and plasma sprayed MCrAlY coatings

被引：0
|
作者：
Wada, K [1 ]
Suenaga, S [1 ]
Yasuda, K [1 ]
Inagaki, H [1 ]
Takeda, H [1 ]
机构：
[1] Toshiba Corp, Mat & Devices Res Lab, Saiwai Ku, Kawasaki, Kanagawa 210, Japan
来源：
ADVANCES IN TURBINE MATERIALS, DESIGN AND MANUFACTURING | 1997年
关键词：
D O I：
暂无
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The nitridation resistance of various commercial superalloys (IN738LC, IN939, MarM247, Rene80, CMSX-2, CMSX-4, Hastelloy X, FSX414) were estimated by heat treatments in a pure nitrogen gas how. The property strongly depends on (1) type of surface oxide scale and (2) titanium content. IN939 and Rene80 suffered severe internal nitridation. MarM247 and CMSX-2 showed superlattice nitridation resistance. The application of MCrAlY coating on a superalloy helps to prevent nitridation. However, the nitridation behavior and the effect depend on the chemical compositions of the MCrAlY coating, probably due to the process of nitrogen penetration through the coating layer.
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页码：698 / 717
页数：20
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