Effects of sintering and mixed oxide growth on the interface cracking of air-plasma-sprayed thermal barrier coating system at high temperature

被引：71

作者：

Lv, Bowen ^{[1
]}

Xie, Hua ^{[2
]}

Xu, Rong ^{[1
]}

Fan, Xueling ^{[1
]}

Zhang, Weixu ^{[1
]}

Wang, T. J. ^{[1
]}

机构：

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

[2] Xi An Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Mech Behav Mat, Xian 710049, Shaanxi, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2016年 / 360卷

关键词：

Thermal barrier coating; Sintering; Mixed oxide; Interface crack; Constitutive model; Finite element method; STRESS-DISTRIBUTION; POWDER COMPACTS; BOND COATS; ZIRCONIA; BEHAVIOR; CREEP; MODEL; FAILURE; TBCS; INTERMEDIATE;

D O I：

10.1016/j.apsusc.2015.10.037

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Sintering and mixed oxide (MO) growth significantly affect the thermal and mechanical properties of thermal barrier coating system (TBCs) in gas turbine at high temperature. In this work, we numerically analyzed the effects of sintering and MO growth on the interface cracking of TBCs. A thermal-elastoviscoplastic constitutive model was introduced, in which the effect of sintering was studied using a spherical shell model. Based on the same spherical shell model and our previous experimental observations, we theoretically derived the evolution of relative density and applied this constitutive model to the sintering of ceramic coating. The numerical results showed that viscosity, initial porosity of ceramic and the growth rate of MO had significant effects on interface cracking. In contrast, the influence of initial pore size of ceramic coating was neglectable. Suggestions were also made for the choice of material during TBCs design. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：461 / 469

页数：9

共 44 条

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