Thermal failure of thermal barrier coating for gas turbine blades by laser heating method

Y. C. Zhou, T. Hashida

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Thermal failure of thermal barrier coating (TBC) was investigated. The fracture was induced by temperature gradient along TBC system thickness direction and oxidation between TBC and bond coat. Laser heating method was used to simulate the operating state of TBC system. Micro-observation and acoustic emission (AE) detect both revealed that fatigue crack was in two forms: surface crack and interface delamination. One can understand the failure mechanism from the plane of TBC surface temperature and substrate surface temperature. It was found that the life of thermal fatigue was reduced by the formation of alumina at interface. On the other hand, it was found that the temperature gradient between inner and outer surface of specimen accelerates the growth of alumina layer.

Original languageEnglish
Title of host publicationMechanics and Material Engineering for Science and Experiments
EditorsY. Zhou, Y. Ghu, Z. Li, Y. Zhou, Y. Gu, Z. Li
Pages396-399
Number of pages4
Publication statusPublished - 2003 Oct 17
EventProceedings of the International Symposium of Young Scholars on Mechanics and Material Engineering for Science and Experiments - Changsha/Zhangjiajie, China
Duration: 2001 Aug 112001 Aug 16

Publication series

NameMechanics and Material Engineering for Science and Experiments

Other

OtherProceedings of the International Symposium of Young Scholars on Mechanics and Material Engineering for Science and Experiments
CountryChina
CityChangsha/Zhangjiajie
Period01/8/1101/8/16

Keywords

  • Oxidation
  • Temperature gradient
  • Thermal barrier ceramic coating
  • Thermal fracture

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanical Engineering

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