High-temperature oxidation and hot-corrosion behaviour of EB-PVD β-NiAlDy coatings

被引：55

作者：

Guo, Hongbo ^{[1
,2
]}

Li, Dongqing ^{[1
]}

Peng, Hui ^{[1
]}

Cui, Yongjing ^{[1
]}

Gong, Shengkai ^{[1
,2
]}

机构：

[1] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China

[2] Beihang Univ, Beijing Key Lab Adv Funct Mat & Thin Film Technol, Beijing 100191, Peoples R China

来源：

CORROSION SCIENCE | 2011年 / 53卷 / 03期

关键词：

Metal coatings; Intermetallics; Oxidation; Hot corrosion; MECHANICAL-PROPERTIES; BOND COAT; RESISTANCE; PERFORMANCE; ALLOYS; MICROSTRUCTURE; ADHESION; HAFNIUM; ELEMENT; SULFUR;

D O I：

10.1016/j.corsci.2010.11.041

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Cr/Dy doped beta-NiAl coatings were produced by electron beam physical vapour deposition (EB-PVD). Cyclic oxidation and hot-corrosion behaviour of the coatings was investigated. The addition of 0.1 at.% Dy to the beta-NiAl coating significantly improved the cyclic oxidation resistance, while the addition of 1.3 at.% Cr to the NiAlDy accelerated the scale spallation. Spinels containing Mg, Na and Ca and pitting resulting from spallation of the spinels were observed on the NiAlDy coating after 200 h hot-corrosion at 950 degrees C. The NiAlDyCr coating effectively suppressed the formation of pitting and spinels. (c) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1050 / 1059

页数：10

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