Microstructure and oxidation resistance of Ti modified Si-Mo coating on Nb-Si based ultrahigh temperature alloy

被引：17

作者：

Li, Longfei ^{[1
]}

Guo, Xiping ^{[1
]}

机构：

[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

来源：

CORROSION SCIENCE | 2023年 / 220卷

基金：

中国国家自然科学基金;

关键词：

Nb-Si based ultrahigh temperature alloy; C11bMoSi2; C40(Mo; Ti)Si2; Slurry sintering; Oxidation behavior; X INTERMETALLICS X=AL; MOSI2; AL; COMPOSITES; PROTECTION; BEHAVIOR; ELEMENTS; TA; HF; ZR;

D O I：

10.1016/j.corsci.2023.111293

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ti modified Si-Mo coatings have been successfully prepared on Nb-Si based ultrahigh temperature alloy by slurry sintering method. The results show that the addition of Ti as well as its content has an obvious influence on the density, grain size and oxidation resistance of the coatings. The 5 at% Ti modified coating possesses the best oxidation protection performance with a multi-layered structure consisting of a C11b MoSi2/C40 (Mo,Ti)Si2 outer layer and a dense (Ti,Nb)5Si4/(Nb,X)5Si3 inner layer. After oxidation, the formation of SiO2 and TiO2 can quickly seal the holes in the coating and form a dense SiO2/TiO2 scale.

引用

页数：12

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