Effects of Splat Interfaces, Monoclinic Phase and Grain Boundaries on the Thermal Conductivity of Plasma Sprayed Yttria-Stabilized Zirconia Coatings

被引：8

作者：

Guo, Xiaojie ^{[1
]}

Zhao, Weiwei ^{[1
]}

Zeng, Yi ^{[1
,2
]}

Lin, Chucheng ^{[1
]}

Zhang, Jimei ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China

来源：

COATINGS | 2019年 / 9卷 / 01期

基金：

国家重点研发计划;

关键词：

YSZ coatings; finite element models; EBSD images; thermal conductivity; microstructure; MICROSTRUCTURE; DEFECTS; MODEL; YSZ;

D O I：

10.3390/coatings9010026

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Microstructure has a significant influence on the thermal conductivity of thermal barrier coating (TBC) systems. In this work, the microstructures including splat interface, monoclinic phase and grain boundaries in the YSZ air plasma spraying (APS) TBC systems are investigated. A finite element simulation model based on electron backscatter diffraction (EBSD) images is established. It is found that the simulation results of thermal conductivity are in good agreement with the experimental results. Using this model, the effect coefficient of splat interface, monoclinic phase and grain boundaries on thermal conductivity are calculated. Results show that the splat interface influences the thermal conductivity of the TBCs. Those results provide important guidance for reducing the thermal conductivity of thermal barrier coatings.

引用

页数：10

共 18 条

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