Cyclic oxidation and interdiffusion behavior of a NiAlDy/RuNiAl coating on a Ni-based single crystal superalloy

被引：89

作者：

Bai, Bo ^{[1
]}

Guo, Hongbo ^{[1
]}

Peng, Hui ^{[1
]}

Peng, Liquan ^{[1
]}

Gong, Shengkai ^{[1
]}

机构：

[1] Beihang Univ, Key Lab Aerosp Mat & Performance, Minist Educ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China

来源：

CORROSION SCIENCE | 2011年 / 53卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Superalloys; Metal coatings; Thermal cycling; Oxidation; Interfaces; HIGH-TEMPERATURE OXIDATION; BOND COAT; DIFFUSION COATINGS; RESISTANCE; RUTHENIUM; DEGRADATION; MECHANISMS; DY;

D O I：

10.1016/j.corsci.2011.04.025

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A novel NiAlDy/RuNiAl coating was deposited onto a Ni-based single crystal superalloy DD3. The cyclic oxidation and interdiffusion of the NiAlDy/RuNiAl coating and a NiAlDy coating at 1100 degrees C were investigated. For the NiAlDy coating, secondary reaction zone (SRZ) consisting of gamma', gamma and sigma-topologically-closed-packed phase (sigma-TCP) needles was formed in the superalloy after 100 h annealing. The NiAlDy/RuNiAl coating effectively suppressed the formation of SRZ as the RuNiAl layer worked as a buffer layer. Premature scale spallation was observed on the NiAlDy coating after about 80 h cyclic oxidation, whereas the NiAlDy/RuNiAl coating exhibited improved oxidation-resistance property. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：2721 / 2727

页数：7

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