THERMAL FRACTURE OF MULTILAYER CERAMIC THERMAL BARRIER COATINGS

被引：42

作者：

TAKEUCHI, YR

KOKINI, K

机构：

[1] Purdue University, Ray W. Herrick Laboratories, School of Mechanical Engineering, West Lafayette, IN

来源：

JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME | 1994年 / 116卷 / 01期

关键词：

D O I：

10.1115/1.2906803

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Controlled experiments and a corresponding analytical model,cere developed to investigate the reasons for crack initiation in multilayer ceramic thermal barrier coatings. The experiments and model determined that surface cracks form as a result of tensile stresses created following stress relaxation in the ceramic at steady-state high temperatures (about 900 degrees C-1100 degrees C). Interface cracks generated by out-of-plane stresses are affected by the presence of these surface cracks and thermal transients and, possibly, edge effects.

引用

页码：266 / 271

页数：6

共 12 条

[1]

ALEXANDER WD, 1988, 3RD P INT C CER MAT, P1449

[2] FAILURE DURING THERMAL CYCLING OF PLASMA-SPRAYED THERMAL BARRIER COATINGS [J].