Prolong the durability of La2Zr2O7/YSZ TBCs by decreasing the cracking driving force in ceramic coatings

被引：59

作者：

Cheng, Bo ^{[1
]}

Wei, Zhi-Yuan ^{[1
]}

Chen, Lin ^{[1
]}

Yang, Guan-Jun ^{[1
]}

Li, Cheng-Xin ^{[1
]}

Li, Chang-Jiu ^{[1
]}

机构：

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

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2018年 / 38卷 / 16期

基金：

美国国家科学基金会;

关键词：

Thermal cyclic lifetime; Thermal barrier coatings (TBCs); Layered structure; Equivalent thermal insulation; THERMAL-BARRIER COATINGS; STRESS INTENSITY FACTORS; PLASMA-SPRAYED YSZ; CONDUCTIVITY; MICROSTRUCTURES; DELAMINATION; MECHANISM; SYSTEM;

D O I：

10.1016/j.jeurceramsoc.2018.08.033

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：

Service lifetime and thermal insulation performance are both crucial for the application of thermal barrier coatings (TBCs). In this study, layered structure design under equivalent thermal insulation conception is introduced to lower the cracking driving force in TBCs, and with the goal of prolonging TBCs lifetime. Three groups of layered LZO/YSZ TBCs were designed with same thermal insulation of 500 mu m YSZ, the LZO layers were deliberately designed with different initial elastic modulus. Virtual crack closure technique (VCCT) calculation result showed that the energy release rates at the crack tips are 28.2, 22, and 18.8 N/m corresponding to the initial elastic modulus of 70, 60, and 50 GPa. After gradient thermal cyclic tests with surface temperature of 1300 degrees C, TBCs with lowest initial elastic modulus showed the longest lifetime, and more than double of pure YSZ TBCs. This study provides a new option for the improvement of TBCs lifetime.

引用

页码：5482 / 5488

页数：7

共 41 条

[11] A sintering model for plasma-sprayed zirconia TBCs. Part I: Free-standing coatings [J].

Cipitria, A. ;

Golosnoy, I. O. ;

Clyne, T. W. .

ACTA MATERIALIA, 2009, 57 (04) :980-992

[12] Thermal-barrier coatings for more efficient gas-turbine engines [J].

Clarke, David R. ;

Oechsner, Matthias ;

Padture, Nitin P. .

MRS BULLETIN, 2012, 37 (10) :891-902

[13] Thermal stability of double-ceramic-layer thermal barrier coatings with various coating thickness [J].

Dai, Hui ;

Zhong, Xinghua ;

Li, Hayan ;

Zhang, Yanfei ;

Meng, Jian ;

Cao, Xueqiang .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2006, 433 (1-2) :1-7

[14] Propagation feature of cracks in plasma-sprayed YSZ coatings under gradient thermal cycling [J].

Dong, Hui ;

Yang, Guan-Jun ;

Cai, Hong-Neng ;

Li, Cheng-Xin ;

Li, Chang-Jiu .

CERAMICS INTERNATIONAL, 2015, 41 (03) :3481-3489

[15] Numerical study on interfacial delamination of thermal barrier coatings with multiple separations [J].

Fan, Xueling ;

Jiang, Wei ;

Li, Jianguo ;

Suo, Tao ;

Wang, T. J. ;

Xu, Rong .

SURFACE & COATINGS TECHNOLOGY, 2014, 244 :117-122

[16]

Guo HB, 2006, J AM CERAM SOC, V89, P1432, DOI 10.1111/j.1551-2916.2006.00912.x

[17] Phase composition and its changes during annealing of plasma-sprayed YSZ [J].

Ilavsky, J ;

Stalick, JK .

SURFACE & COATINGS TECHNOLOGY, 2000, 127 (2-3) :120-129

[18] Low-thermal-conductivity plasma-sprayed thermal barrier coatings with engineered microstructures [J].

Jadhav, Amol D. ;

Padture, Nitin P. ;

Jordan, Eric H. ;

Gell, Maurice ;

Miranzo, Pilar ;

Fuller, Edwin R., Jr. .

ACTA MATERIALIA, 2006, 54 (12) :3343-3349

[19] Phase stability and thermal conductivity of nanostructured tetragonal yttria-stabilized zirconia thermal barrier coatings deposited by air-plasma spraying [J].

Jiang, Kuo ;

Liu, Songbai ;

Wang, Xin .

CERAMICS INTERNATIONAL, 2017, 43 (15) :12633-12640

[20] Thermal conductivity and thermal expansion coefficients of the lanthanum rare-earth-element zirconate system [J].

Lehmann, H ;

Pitzer, D ;

Pracht, G ;

Vassen, R ;

Stöver, D .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2003, 86 (08) :1338-1344

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