Thermal cycling behaviors of the plasma sprayed thermal barrier coatings of hexaluminates with magnetoplumbite structure

被引：82

作者：

Chen, Xiaolong ^{[1
,2
]}

Zhang, Yanfei ^{[1
,2
]}

Zhong, Xinhua ^{[1
,2
]}

Xu, Zhenhua ^{[1
,2
]}

Zhang, Jiangfeng ^{[1
,2
]}

Cheng, Yongliang ^{[1
,2
]}

Zhao, Yu ^{[1
,2
]}

Liu, Yangjia ^{[3
]}

Fan, Xizhi ^{[3
]}

Wang, Ying ^{[1
]}

Ma, Hongmei ^{[1
]}

Cao, Xueqiang ^{[1
]}

机构：

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

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

[3] Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410004, Hunan, Peoples R China

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2010年 / 30卷 / 07期

关键词：

Thermal barrier coatings; Magnetoplumbite; Plasma spraying; Thermal cycling behavior; ABNORMAL GRAIN-GROWTH; LANTHANUM HEXAALUMINATE; CALCIUM HEXALUMINATE; CERIUM OXIDE; CONDUCTIVITY; ZIRCONATE; ALUMINA;

D O I：

10.1016/j.jeurceramsoc.2010.01.013

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：

Hexaluminates with magnetoplumbite structure are important high temperature ceramic materials for thermal barrier coatings (TBCs) Four hexaluminate coatings including NdMgAl11O19 (NdMA), SmMgAl11O19 (SmMA), GdMgAl11O19 (GdMA) and SrAl12O19 (SrHA) were prepared by plasma spraying During plasma spraying, rare earth (RE) hexaluminates are partially decomposed, resulting in the loss of MgO. For RE hexaluminate coatings, the thermal cycling lifetime decreases with the reduction of RE3+ radius, while SrHA has the shortest lifetime The random arrangement of the platelet-like hexagonal crystals resulted from the recrystallization during thermal cycling may reduce the bond strength of the coatings and make a huge contribution to coatings failure The different thermal cycling behaviors of these coatings seem to be dependent on their recrystallization differences to a large extent (C) 2010 Elsevier Ltd. All rights reserved

引用

页码：1649 / 1657

页数：9

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