Study of oxidation behavior of nanostructured NiCrAlY bond coatings deposited by cold spraying

被引：119

作者：

Zhang, Qiang ^{[1
]}

Li, Chang-Jiu ^{[1
]}

Li, Cheng-Xin ^{[1
]}

Yang, Guan-Jun ^{[1
]}

Lui, Siu-Ching ^{[2
]}

机构：

[1] Xian Jiaotong Univ, Sch Mat Sci & Engn, State Key Lab Mech Behav Mat, Xian 710049, Shaanxi, Peoples R China

[2] Honeywell Aerosp, Adv Mat & Proc, Morristown, NJ USA

来源：

SURFACE & COATINGS TECHNOLOGY | 2008年 / 202卷 / 14期

关键词：

nanostructured coating; cold spray; NiCrAlY; isothermal oxidation; oxide evolution;

D O I：

10.1016/j.surfcoat.2007.12.028

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Nanostructured NiCrAlY bond coating was deposited using a milled powder by cold spraying. A shot-peening treatment was then applied to the as-sprayed coating to modify the coating surface morphology. The oxidation behavior of the coating with the as-sprayed surface and shot-peened surface was investigated under isothermal oxidation at 900 degrees C and 1000 degrees C for different times. The oxidation behavior of the coating was characterized through surface morphology and cross-sectional microstructure by scanning electron microscopy. R was found that a uniform oxide layer was formed on the surface of the shot-peened nanostructured NiCrAlY coating during oxidation at temperatures of 900 degrees C and 1000 degrees C. The surface morphology of the coating has significant effect on the morphology of the oxide. The surface geometry of the cold-sprayed MCrAlY coating must be modified to promote formation of a protective oxide film during oxidation, through application of a post-treatment process such as shot-peening. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：3378 / 3384

页数：7

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