Effect of Dy on oxide scale adhesion of NiAl coatings at 1200 °C

被引：89
作者：
Guo, Hongbo [1 ,2 ]
Zhang, Tian [2 ]
Wang, Shixing [2 ]
Gong, Shengkai [1 ,2 ]
机构：
[1] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
[2] Minist Educ, Key Lab Aerosp Mat & Performance, Beijing 100191, Peoples R China
来源：
CORROSION SCIENCE | 2011年 / 53卷 / 06期
关键词：
Metal coating; AES; TEM; Oxidation; Segregation; HIGH-TEMPERATURE OXIDATION; BOND COATINGS; BEHAVIOR; RESISTANCE; INTERFACE; SYSTEMS; ALLOYS; SEGREGATION; ZIRCONIUM; ALUMINIDE;
D O I：
10.1016/j.corsci.2011.03.003
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The cyclic oxidation behaviour of beta-NiAlDy coatings produced by electron beam physical vapour deposition (EB-PVD) was investigated. For the Dy-free NiAl coating, numerous voids developed at the Al2O3 scale/NiAl interface and sulfur was found to segregate at the void surfaces, leading to early spallation of the scale. The addition of Dy prevented sulfur segregation and void formation at the scale/NiAl interface. As a result, the scale grown on the NiAlDy coating remained adherent and no spallation occurred even after 400 h cyclic oxidation. The 0.05 at.% Dy doped coating revealed lower oxidation rate than the more Dy doped coatings. (C) 2011 Elsevier Ltd. All rights reserved.
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收藏
页码：2228 / 2232
页数：5
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