Ion-plated Al-Al2O3 films as diffusion barriers between NiCrAlY coating and orthorhombic-Ti2AlNb alloy

被引：36

作者：

Li, H. Q. ^{[1
]}

Wang, Q. M. ^{[1
]}

Jiang, S. M. ^{[1
]}

Gong, J. ^{[1
]}

Sun, C. ^{[1
]}

机构：

[1] Chinese Acad Sci, State Key Lab Corros & Protect, Inst Met Res, Shenyang 110016, Peoples R China

来源：

CORROSION SCIENCE | 2010年 / 52卷 / 05期

关键词：

Metal coatings; Titanium; SEM; XRD; Oxidation; GAS-TURBINE BLADES; OXIDATION BEHAVIOR; TI2ALNB ALLOYS; MCRALY-COATINGS; TEMPERATURE; INTERMETALLICS; INTERDIFFUSION; PROTECTION; RESISTANCE; ALUMINUM;

D O I：

10.1016/j.corsci.2010.02.002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ion-plated Al-Al2O3 cermet films were fabricated as diffusion barriers between NiCrAlY coating and orthhombic-Ti2AlNb alloy. The oxidation and interdiffusion behaviour of coatings with and without diffusion barrier were investigated in isothermal and cyclic oxidation tests at 800 degrees C. The results indicated that substantial interdiffusion and rapid oxidation degradation occurred in the coated specimens without diffusion barrier. With Al-Al2O3 diffusion barriers, deferred interdiffusion and improved oxidation resistance was observed. Among them, duplex coating containing 1Al-Al2O3 interlayer exhibited the best performance. Coefficient of diffusion hindering and factor of reaction hindering were proposed to compare and quantify the efficiency of the diffusion barriers. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1668 / 1674

页数：7

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