Phase composition evolution and oxidation behavior of atmospheric plasma spraying Si and Si-HfO2 bond coats at 1300 °C

被引：4
|
作者：
Yu, Shuang [1 ,2 ]
Wang, Yaming [1 ,2 ]
Wang, Shuqi [1 ,2 ]
Zhao, Qiang [3 ]
Li, Yang [3 ]
Ren, Dawei [3 ]
Chen, Guoliang [1 ,2 ]
Zou, Yongchun [1 ,2 ]
Ouyang, Jiahu [1 ,2 ]
Jia, Dechang [1 ,2 ]
Zhou, Yu [1 ,2 ]
机构：
[1] Harbin Inst Technol, Inst Adv Ceram, Harbin 150080, Peoples R China
[2] Harbin Inst Technol, Key Lab Adv Struct Funct Integrated Mat & Green Mf, Harbin 150001, Peoples R China
[3] Harbin Guanghan Gas Turbine Co Ltd, Harbin 150046, Peoples R China
来源：
CORROSION SCIENCE | 2023年 / 222卷
关键词：
Si-HfO 2 bond coat; Oxidation resistance; Thermally grown oxide; Coefficient of thermal expansion; TRANSITION; HAFNIA; CRISTOBALITE;
D O I：
10.1016/j.corsci.2023.111439
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The oxidation resistance of pure Si and Si-HfO2 bond coats with three different compositions were investigated at 1300 & DEG;C. The pure Si bond coat is easy to crack and exfoliate due to the volume expansion of SiO2 produced by the oxidation of Si and the transformation of & beta;& RARR;& alpha;-cristobalite during cooling. While the 60Si-40HfO2 bond coat has excellent oxidation resistance at 1300 & DEG;C for 100 h, attributed to the oxidation product HfSiO4 consuming more SiO2 (the thickness of thermally grown oxide is 3.08 & PLUSMN; 0.36 & mu;m), which inhibits the sharp increase of thermal stress of the bond coat.
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页数：15
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