Protectiveness of Pt and Gd2Zr2O7 layers on EB-PVD YSZ thermal barrier coatings against calcium-magnesium-alumina-silicate (CMAS) attack

被引：76

作者：

Wang, Lu ^{[1
]}

Guo, Lei ^{[2
,3
]}

Li, Zhuomin ^{[1
]}

Peng, Hui ^{[1
,4
]}

Ma, Yue ^{[1
]}

Gong, Shengkai ^{[1
,4
]}

Guo, Hongbo ^{[1
,4
]}

机构：

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

[2] Tianjin Univ, Sch Mat Sci & Engn, Tianjin, Peoples R China

[3] Tianjin Univ, Tianjin Key Lab Adv Joining Technol, Tianjin 300072, Peoples R China

[4] Beihang Univ, Key Lab Aerosp Mat & Performance, Minist Educ, Beijing 100191, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2015年 / 41卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Thermal barrier coatings (TBCs); Yttria stabilized zirconia (YSZ); Calcium-magnesium-aluminum-silicon (CMAS); Pt film; Gd2Zr2O7; layer; TURBINE ENGINE APPLICATIONS; MECHANICAL-PROPERTIES; DEPOSITS; DELAMINATION; INFILTRATION; DEGRADATION; EROSION;

D O I：

10.1016/j.ceramint.2015.05.128

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Thermal barrier coatings (TBCs) are susceptible to degradation caused by environmental deposits mainly composed of calcium-magnesium-aluminum-silicon (CMAS). In this work, the degradation of electron beam physical vapour deposition (EB-PVD) yttria stabilized zirconia (YSZ) TBC due to CMAS attack was investigated. To protect the YSZ coating, a Pt film and a Gd2Zr2O7 (GZO) layer were deposited onto the YSZ coating surface by electroplating and EB-PVD, respectively. The coatings were heat treated at 1250 degrees C for 4 h with CMAS deposits, and their microstructure and chemical composition after CMAS attack were investigated. Electroplating a dense and defect-free Pt film on YSZ coating could provide effective protection from CMAS attack, but EB-PVD GZO coating was unable to prevent molten CMAS infiltration, mainly due to the large inter-columnar gaps. The associated mechanisms were discussed in detail. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：11662 / 11669

页数：8

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