Thermal barrier coatings with a double-layer bond coat on Ni3Al based single-crystal superalloy

被引：36

作者：

Zhou, Xin ^{[1
,2
,3
]}

Xu, Zhenhua ^{[3
]}

Mu, Rende ^{[3
]}

He, Limin ^{[3
]}

Huang, Guanghong ^{[3
]}

Cao, Xueqiang ^{[1
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resource Utilizat, Changchun 130022, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Beijing Inst Aeronaut Mat, Dept 5, Beijing 100095, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2014年 / 591卷

基金：

中国国家自然科学基金;

关键词：

Thermal barrier coatings; Double-layer bond coat; (Ni; Pt); Al; NiCrAlYSi; TGO; TEMPERATURE OXIDATION BEHAVIOR; NI-BASED SUPERALLOY; CORROSION BEHAVIOR; DIFFUSION BARRIER; CYCLIC OXIDATION; MECHANISMS; EVOLUTION; SYSTEMS; FAILURE; LA-2(ZR0.7CE0.3)(2)O-7;

D O I：

10.1016/j.jallcom.2013.12.040

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Electron-beam physical vapor deposited thermal barrier coatings (TBCs) with a double-layer bond coat of (Ni, Pt)Al and NiCrAlYSi were prepared on a Ni3Al based single-crystal superalloy. Phase and cross-sectional microstructure of the developed coatings were studied by using X-ray diffraction (XRD) and scanning electron microscope (SEM), respectively. The experimental results show good adherence at all interfaces within this system. Furthermore, oxidation resistance and elements interdiffusion behavior of the double-layer bond coat were also investigated. The double-layer bond coat system exhibits a better scale adherence than the single layer bond coat systems since the underlying (Ni, Pt)Al layer can supply abundant Al for the upper NiCrAlYSi layer. Finally, thermal cycling behavior of the double-layer bond coat TBC was evaluated and the failure mechanism was discussed. Crack nucleation, propagation and coalescence caused by TGO growth stress and the thermal expansion mismatch stress between TGO and bond coat can be mainly responsible for the spallation of this coating. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：41 / 51

页数：11

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