Evaluation of lifetime of FGMs disilicide coatings for γ-TiAl intermetallic compound

被引：0
|
作者：
Ohshima, Masayuki [1 ]
Abu Suilik, Saleh B. [1 ]
Tetsui, Toshimitsu [2 ]
Hasezaki, Kazuhiro [1 ]
机构：
[1] Shimane Univ, Dept Mat Sci, Nishikawatsu Cho 1060, Matsue, Shimane 6908504, Japan
[2] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
来源：
MULTISCALE, MULTIFUNCTIONAL AND FUNCTIONALLY GRADED MATERIALS | 2010年 / 631-632卷
关键词：
Titanium aluminide; intermetallic compound; lifetime; siliconization; molten salts; oxidation resistance coatings; general oxidation; volume diffusion; OXIDATION BEHAVIOR;
D O I：
10.4028/www.scientific.net/MSF.631-632.495
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The NbSi2/Nb/gamma-TiAl and NbSi2/Nb functionally graded materials (FGMs) were prepared and their tolerances tested by exposing them to temperatures from 1050 degrees C to 1250 degrees C under vacuum and in air. Oxygen resistivity was estimated from metallographic investigations. The FGM lifetime was estimated by using a diffusion equation that considers the disappearance of the NbSi2 and Nb interlayer. These occurred during NbSi2 oxidation and Si diffusion from NbSi2 to Nb and interdiffusion between Nb and gamma-TiAl. The results were validated by diffusion equations.
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页码：495 / +
页数：2
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