Microstructure and Thermophysical Properties of SrZrO3 Thermal Barrier Coating Prepared by Solution Precursor Plasma Spray

被引：13

作者：

Ma, Wen ^{[1
,2
]}

Li, Xinhui ^{[1
,2
]}

Meng, Xiangfeng ^{[1
,2
]}

Xue, Yannan ^{[1
,2
]}

Bai, Yu ^{[1
,2
]}

Chen, Weidong ^{[1
,2
]}

Dong, Hongying ^{[3
]}

机构：

[1] Inner Mongolia Univ Technol, Sch Mat Sci & Engn, Hohhot 010051, Peoples R China

[2] Inner Mongolia Key Lab Thin Film & Coatings Techn, Hohhot 010051, Peoples R China

[3] Inner Mongolia Univ Technol, Sch Chem Engn, Hohhot 010051, Peoples R China

来源：

JOURNAL OF THERMAL SPRAY TECHNOLOGY | 2018年 / 27卷 / 07期

基金：

中国国家自然科学基金;

关键词：

perovskites; segmented coatings; solution precursor plasma spray; thermal barrier coatings (TBCs); thermophysical properties; STRONTIUM ZIRCONATE; CONDUCTIVITY;

D O I：

10.1007/s11666-018-0744-9

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Strontium zirconate (SrZrO3) thermal barrier coatings were deposited by solution precursor plasma spray (SPPS) using an aqueous precursor solution. The phase transition of the SrZrO3 coating and the influence of the aging time at 1400 degrees C on the microstructure, phase stability, thermal expansion coefficient, and thermal conductivity of the coating were investigated. The unique features of SPPS coatings, such as interpass boundary (IPB) structures, nano- and micrometer porosity, and through-thickness vertical cracks, were clearly observed evidently in the coatings. The vertical cracks of the coatings remained substantially unchanged while the IPB structures gradually diminished with prolonged heat treatment time. t-ZrO2 developed in the coatings transformed completely to m-ZrO2 phase after heat treatment for 100h. Meanwhile, the SrZrO3 phase in the coatings exhibited good phase stability upon heat treatment. Three phase transitions in the SrZrO3 coatings were revealed by thermal expansion measurements. The thermal conductivity of the as-sprayed SrZrO3 coating was 1.25Wm(-1)K(-1) at 1000 degrees C and remained stable after heat treatment at 1400 degrees C for 360h, revealing good sintering resistance.

引用

页码：1056 / 1063

页数：8

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