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.

引用

页数：12