Effects of reactive element oxides on the isothermal oxidation of β-NiAl coatings fabricated by spark plasma sintering

被引：19
作者：
Chen, Wenfu [1 ]
He, Limin [2 ]
Guo, Yi [3 ]
Shan, Xiao [1 ]
Li, Jianghua [4 ]
Guo, Fangwei [1 ]
Zhao, Xiaofeng [1 ]
Ni, Na [5 ]
Xiao, Ping [3 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China
[2] Beijing Inst Aeronaut Mat, Beijing 100095, Peoples R China
[3] Univ Manchester, Sch Mat, Grosvenor St, Manchester M1 7HS, Lancs, England
[4] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Hebei, Peoples R China
[5] Shanghai Jiao Tong Univ, Sch Mech Engn, Shanghai, Peoples R China
来源：
SURFACE & COATINGS TECHNOLOGY | 2019年 / 357卷
基金：
中国国家自然科学基金; 英国工程与自然科学研究理事会;
关键词：
NiAl; Coatings; Reactive element oxide; Oxidation; Spallation; SCALE ADHESION; BEHAVIOR; GROWTH; SEGREGATION; ALPHA-AL2O3; MECHANISM; STRESSES; SYSTEMS;
D O I：
10.1016/j.surfcoat.2018.10.021
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The CeO2, Y2O3 and HfO2 doped beta-NiAl coatings with controlled concentrations were fabricated on Hastelloy substrates using spark plasma sintering. The effects of reactive element oxide (REO) species and concentrations on the isothermal oxidation of the beta-NiAl coatings were investigated. It was found that the addition of Y2O3 and HfO2 improved the oxidation performance of beta-NiAl coatings, but CeO2 with high concentrations (0.5 at.%) had a detrimental effect. At low concentration (0.05 at.% and 0.1 at.%), HfO2 was less effective in improving the oxidation resistance of beta-NiAl compared with Y2O3 and CeO2, while HfO2 at higher concentration of 0.5 at.% was the most effective among the three. The effects of REO species and concentrations on the NiAl oxidation behavior were further discussed in related to the intrinsic properties of the REOs and the chemical compositions of the substrate.
引用
收藏
页码：322 / 331
页数：10
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