Effect of Y-doping on the microstructural evolution and oxidation resistance of NiAlHf coatings at 1200 °C

被引：0
|
作者：
Li, Xiaoya [1 ,2 ]
Yang, Hongzhi [2 ]
Tang, Peng [2 ]
Su, Yifan [2 ]
Lin, Songsheng [2 ]
Dai, Mingjiang [2 ]
Zhang, Cheng [2 ]
Zou, Jianpeng [1 ]
Shi, Qian [2 ]
机构：
[1] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China
[2] Guangdong Acad Sci, Natl Engn Lab Modern Mat Surface Engn Technol, Guangdong Prov Key Lab Modern Surface Engn Technol, Inst New Mat, Guangzhou 510651, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2023年 / 49卷 / 22期
关键词：
Y-doping; Microstructural evolution; Oxidation resistance; Synergistic effect; GRAIN-BOUNDARY SEGREGATION; REACTIVE ELEMENTS; SINGLE-CRYSTAL; BOND COAT; BEHAVIOR; HF; ALLOYS; PERFORMANCE; CORROSION; ADHESION;
D O I：
10.1016/j.ceramint.2023.08.185
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The microstructure and oxidation resistance of NiAlHf and NiAlHfY coatings were systematically investigated at 1200 degrees C in air. The results revealed that Hf-rich oxides, Y-rich oxides, (Hf, Y)-rich oxides distributed at grain boundaries of oxide scale for NiAlHfY coating, which improved the adhesion and spallation resistance of oxide scale. And oxidation weight gains of NiAlHf, NiAlHfY coatings were 2.2425 and 1.8231 mg cm-2, respectively, which was reduced by 18.7% after Y-doping. The enhanced oxidation resistance was attributed to better synergistic effect of Hf and Y impeding ions diffusion. Finally, the Y-doping mechanism responsible for enhanced oxidation resistance was discussed.
引用
收藏
页码：35123 / 35134
页数：12
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