Stress-dependent sintering behavior of porous thermal barrier coatings

被引：6

作者：

Lv, Bowen ^{[1
,2
]}

Wang, Chao ^{[1
]}

Zhang, Xiaofeng ^{[1
]}

Mao, Jie ^{[1
]}

Qu, Zhaoliang ^{[3
]}

Deng, Chunming ^{[1
]}

Deng, Changguang ^{[1
]}

Liu, Min ^{[1
]}

机构：

[1] Guangdong Acad Sci, Inst New Mat, Natl Engn Lab Modern Mat Surface Engn Technol, Guangzhou 510651, Peoples R China

[2] Xi An Jiao Tong Univ, State Key Lab Strength & Vibrat Mech Struct, Xian 710049, Peoples R China

[3] Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2023年 / 43卷 / 06期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Sintering; Stress dependence; Thermal barrier coatings; Four-point bending; Finite element analysis; MICROSTRUCTURAL CHARACTERIZATION; CONSTITUTIVE MODEL; SIMULATION; RESISTANCE; POROSITY; NEUTRON; CREEP;

D O I：

10.1016/j.jeurceramsoc.2023.01.016

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 subjected to high temperature and complex stress fields during service in gas turbines. In this process, densification and hardening take place as the result of sintering, which is sensitive to boundary condition/external load. The stress-dependent sintering behaviors of porous TBCs were investigated in this work using a customized four-point bending method. Furthermore, stress-dependent sintering model was developed and implemented in finite element analysis to elucidate sintering mechanisms. It was found that stress gradient induced nonlinear differential sintering behavior, due to the accelerating and retarding effects of compressive and tensile stresses, respectively. In addition, microstructure-mechanical property relation was determined following the exponential law and high-throughput method was proposed for the characterization of stress dependence. The in-depth understanding of stress-dependent sintering behavior could provide guidance to the design and failure analysis of TBCs applied on complex shaped components in the hot section of gas turbines.

引用

页码：2634 / 2645

页数：12

共 40 条

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