Preparation and Isothermal Oxidation Behavior of Zr-Doped, Pt-Modified Aluminide Coating Prepared by a Hybrid Process

被引：10
|
作者：
Fan, Qixiang [1 ]
Yu, Haojun [2 ]
Wang, Tie-Gang [1 ]
Wu, Zhenghuan [1 ]
Liu, Yanmei [1 ]
机构：
[1] Tianjin Univ Technol & Educ, Tianjin Key Lab High Speed Cutting & Precis Machi, Tianjin 300222, Peoples R China
[2] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
来源：
COATINGS | 2018年 / 8卷 / 01期
关键词：
Pt-modified aluminide coating; zirconium; oxidation resistance; microstructure; hybrid process; NI-BASED SUPERALLOY; CYCLIC-OXIDATION; HIGH-TEMPERATURE; BOND COAT; MICROSTRUCTURAL DEVELOPMENT; SCALE GROWTH; SUBSTRATE; PERFORMANCE; RESISTANCE; PLATINUM;
D O I：
10.3390/coatings8010001
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
To take advantage of the synergistic effects of Pt and Zr, a kind of Zr-doped, Pt-modified aluminide coating has been prepared by a hybrid process, first electroplating a Pt layer and then co-depositing Zr and Al elements by an above-the-pack process. The microstructure and isothermal oxidation behavior of the coating has been studied, using a Pt-modified aluminide coating as a reference. Results showed that the Zr-doped, Pt-modified aluminide coating was primarily composed of beta-(Ni,Pt)Al phase, with small amounts of PtAl2- and Zr-rich phases dispersed in it. The addition of Zr diminished voids on the coating surface since Zr could hinder the growth of beta-NiAl grains. It also helped to increase the spalling resistance of the oxide scale and reduce the oxidation rate, which made the Zr-doped, Pt-modified aluminide coating possess better oxidation resistance than the reference Pt-modified aluminide coating at the temperature of 1100 degrees C.
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页数：12
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