Oxidation resistance of TiAl-Inconel625 graded alloying layer

被引：1
|
作者：
Zheng, CL [1 ]
Cui, FZ
Feng, QL
Xu, Z
Xie, XS
He, ZY
机构：
[1] Tsinghua Univ, Dept Mat Sci & Engn, Beijing 100084, Peoples R China
[2] Taiyuan Univ Technol, Surface Engn Inst, Shanxi 030024, Peoples R China
[3] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
来源：
FUNCTIONALLY GRADED MATERIALS VII | 2003年 / 423-4卷
关键词：
TiAl intermetallics; Inconel625; alloying layer; oxidation resistance;
D O I：
10.4028/www.scientific.net/MSF.423-425.81
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this paper, TiAl-Incone1625 graded alloying layers were fabricated at 1173 K by means of double glow plasma surface alloying technique (DGPSA). The effects of the TiAl-Incone1625 graded alloying layers on the oxidation resistance of TiAl intermetallic compound were investigated at 1223 K in a static air environment. The bare TiAl exhibited poor oxidation resistance at 1223K due to the formation of TiO2-base scale which tends to spall off. However, The TiAl-Incone-1625 (NiCrMoNb) graded alloying layer obviously improved the oxidation resistance of TiAl because of the formation of a dense and adherent Al2O3-rich scale. An inter-diffusion between scale and substrate was observed. Ni, Cr, Mo, Nb enriched along the scale-substrate (S-S) interface, which led a great change of the interface chemistry.
引用
收藏
页码：81 / 84
页数：4
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