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

被引：90
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
相关论文
共 34 条
[1]  
ANTILL JE, 1967, J IRON STEEL I, V205, P1136
[2]   EFFECT OF 0.1 AT-PERCENT ZIRCONIUM ON THE CYCLIC OXIDATION RESISTANCE OF BETA-NIAL [J].
BARRETT, CA .
OXIDATION OF METALS, 1988, 30 (5-6) :361-390
[3]   OXIDATION BEHAVIOR OF NIAL .2. CAVITY FORMATION BENEATH THE OXIDE SCALE ON NIAL OF DIFFERENT STOICHIOMETRIES [J].
BRUMM, MW ;
GRABKE, HJ .
CORROSION SCIENCE, 1993, 34 (04) :547-&
[4]   Effects of segregating elements on the adhesive strength and structure of the α-Al2O3/β-NiAl interface [J].
Carling, Karin M. ;
Carter, Emily A. .
ACTA MATERIALIA, 2007, 55 (08) :2791-2803
[5]   TRANSIENT OXIDATION OF SINGLE-CRYSTAL BETA-NIAL [J].
DOYCHAK, J ;
SMIALEK, JL ;
MITCHELL, TE .
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1989, 20 (03) :499-518
[6]   FACTORS AFFECTING ADHESION OF OXIDE SCALES ON ALLOYS [J].
GIGGINS, CS ;
KEAR, BH ;
PETTIT, FS ;
TIEN, JK .
METALLURGICAL TRANSACTIONS, 1974, 5 (07) :1685-1688
[7]   Progress in coatings for gas turbine airfoils [J].
Goward, GW .
SURFACE & COATINGS TECHNOLOGY, 1998, 108 (1-3) :73-79
[8]   High temperature oxidation behavior of hafnium modified NiAl bond coat in EB-PVD thermal barrier coating system [J].
Guo, Hongbo ;
Sun, Lidong ;
Li, Hefei ;
Gong, Shengkai .
THIN SOLID FILMS, 2008, 516 (16) :5732-5735
[9]   EFFECTS OF Dy ON THE MICROSTRUCTURE AND SPALLATION FAILURE OF THE ALUMINA SCALES GROWN ON NiAl [J].
Guo, Hongbo ;
Wang, Xiaoyan ;
Gong, Shengkai .
INTERNATIONAL JOURNAL OF MODERN PHYSICS B, 2010, 24 (15-16) :3149-3154
[10]   CYCLIC OXIDATION BEHAVIORS OF EB-PVD Dy DOPED β-NiAl COATINGS AT 1100°C [J].
Guo, Hongbo ;
Wang, Shixing ;
Wang, Xiaoyan ;
Gong, Shengkai .
INTERNATIONAL JOURNAL OF MODERN PHYSICS B, 2010, 24 (15-16) :3143-3148
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