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TEM study of the evolution of sputtered Ni plus CrAlYSiHfN nanocomposite coating with an AlN diffusion barrier at high temperature
Ren, Pan; Zhu, Shenglong; Wang, Fuhui; pren11s@imr.ac.cn
2016
Source PublicationSURFACE & COATINGS TECHNOLOGY
ISSN0257-8972
Volume286Pages:262-267
AbstractMCrAlY (M denotes Ni and/or Co) coatings are widely used on the turbine blades to protect the aeroengine at high temperature. However, the interdiffusion between coating/substrate and the coefficient of thermal expansion (CTE) mismatch between protective oxides layer/coating are the main factors that limit the service lifetime of MCrAlY coatings. In this work, a Ni+CrAlYSiHfN/AlN nanocomposite duplex coating system was designed to improve the weakness of conventional MCrAlY coatings. The nanocomposite coating system exhibited a low oxidation rate in the 1000 degrees C isothermal oxidation test and the oxidation rate constant of the coating system was 633 * 10(-13) g(2) cm(-4) s(-1) at the first 20 h, and then the TGO grew at a low constant of 1.49 * 10(-13) g(2) cm(-4) s(-1) until 200 h. Besides, the AlN diffusion barrier effectively inhibited the interdiffusion between coating/substrate. The evolution of coating microstructures and thermal growth oxides (TGO) at high temperature were studied with the aid of transmission electron microscopy. (C) 2015 Elsevier B.V. All rights reserved.
description.department[ren, pan ; zhu, shenglong ; wang, fuhui] chinese acad sci, inst met res, dept high temp corros & protect, shenyang 110016, peoples r china
KeywordOxidation High Temperature Tem Nanocomposite Coating
Funding OrganizationNational Key Basic Research Program of China (973 Program) [2012CB625100]; National Nature Science Foundation of China [51231001]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/75179
Collection中国科学院金属研究所
Corresponding Authorpren11s@imr.ac.cn
Recommended Citation
GB/T 7714
Ren, Pan,Zhu, Shenglong,Wang, Fuhui,et al. TEM study of the evolution of sputtered Ni plus CrAlYSiHfN nanocomposite coating with an AlN diffusion barrier at high temperature[J]. SURFACE & COATINGS TECHNOLOGY,2016,286:262-267.
APA Ren, Pan,Zhu, Shenglong,Wang, Fuhui,&pren11s@imr.ac.cn.(2016).TEM study of the evolution of sputtered Ni plus CrAlYSiHfN nanocomposite coating with an AlN diffusion barrier at high temperature.SURFACE & COATINGS TECHNOLOGY,286,262-267.
MLA Ren, Pan,et al."TEM study of the evolution of sputtered Ni plus CrAlYSiHfN nanocomposite coating with an AlN diffusion barrier at high temperature".SURFACE & COATINGS TECHNOLOGY 286(2016):262-267.
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