Microstructure, thermal conductivity and thermal cycling behavior of thermal barrier coatings prepared by plasma spray physical vapor deposition

被引：81

作者：

Gao, Lihua ^{[1
,2
]}

Guo, Hongbo ^{[1
,2
]}

Wei, Liangliang ^{[1
,2
]}

Li, Chenyi ^{[1
,2
]}

Xu, Huibin ^{[1
,2
]}

机构：

[1] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China

[2] Beihang Univ, Beijing Key Lab Adv Funct Mat & Thin Film Technol, Beijing 100191, Peoples R China

来源：

SURFACE & COATINGS TECHNOLOGY | 2015年 / 276卷

基金：

中国国家自然科学基金;

关键词：

Plasma spray physical vapor deposition (PS-PVD); Thermal conductivity; Thermal barrier coatings (TBCs); Thermal cycling behavior; Failure mechanism; STABILIZED ZIRCONIA COATINGS; THERMOPHYSICAL PROPERTIES; PVD; CERAMICS; POROSITY; SYSTEMS; GROWTH;

D O I：

10.1016/j.surfcoat.2015.06.033

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Plasma spray physical vapor deposition (PS-PVD) was used to deposit yttria stabilized zirconia (YSZ) coatings with microstructures varying from dense lamellae to quasi-columns out of vapor, as well as hybrid microstructure resulting from liquid droplet and vapor co-deposition. Among the coatings investigated, the quasi-columnar coating exhibited the lowest thermal conductivity of around 1.1 W/mK at 1200 degrees C due to high porosity and defects. The quasi-columnar coating also had an average life of around 2000 cycles during flame shock testing with a coating surface temperature of similar to 1200 degrees C. The failure of the coating occurred through cracking at the interface between the thermally grown oxide (TGO) layer and YSZ top coat. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：424 / 430

页数：7

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