Sintering and creep processes in plasma-sprayed thermal barrier coatings

被引：105

作者：

Ahrens, M

Lampenscherf, S

Vassen, R

Stöver, D

机构：

[1] Forschungszentrum Julich, Inst Werkstoffe & Verfahren Energietech 1, D-52425 Julich, Germany

[2] Siemens AG, Corp Technol, D-81730 Munich, Germany

来源：

JOURNAL OF THERMAL SPRAY TECHNOLOGY | 2004年 / 13卷 / 03期

关键词：

bending tests; Burgers model; thermal barrier coatings; viscosity; Young's modulus;

D O I：

10.1361/10599630420434

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

During operation at elevated temperatures, sintering processes can significantly influence the mechanical properties of thermal barrier coatings (TBCs) by increasing Young's modulus and reducing strain tolerance. These changes of the mechanical response of TBCs were investigated using free-standing plasma-sprayed TBCs in a thermornechanical analysis (TMA) facility. The time-dependent change of Young's modulus was determined in situ in a flexure mode at different annealing temperatures. In addition, relaxation processes during loading and unloading were monitored. The time-dependent deformation behavior of the TBC sample can be described by a simple viscoelastic approach (Burgers model). Viscosity data are determined as a function of annealing temperature and time.

引用

页码：432 / 442

页数：11

共 30 条

[1] Stress distributions in plasma-sprayed thermal barrier coatings as a function of interface roughness and oxide scale thickness [J].