Life prediction of thermal barrier coating considering degradation and thermal fatigue

A thermal barrier coating (TBC) is used to protect gas turbine components from extreme environments. Typically, the TBC system consists of two parts: a ceramic top coat and metallic bond coat. Thus, the TBC system is exposed to thermal fatigue owing to the mismatch between the thermal expansions of...

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Bibliographic Details
Published inInternational journal of precision engineering and manufacturing Vol. 17; no. 2; pp. 241 - 245
Main Authors Song, Hyunwoo, Kim, Yongseok, Lee, Jeong-Min, Yun, Junghan, Kim, Dae-Jin, Koo, Jae-Mean, Seok, Chang-Sung
Format Journal Article
LanguageEnglish
Published Seoul Korean Society for Precision Engineering 01.02.2016
Subjects
Engineering
Industrial and Production Engineering
Materials Science
Degradation
Life prediction
Thermal fatigue
Bond strength test
Thermal barrier coating
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ISSN2234-7593
2005-4602
DOI10.1007/s12541-016-0031-y

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Summary:A thermal barrier coating (TBC) is used to protect gas turbine components from extreme environments. Typically, the TBC system consists of two parts: a ceramic top coat and metallic bond coat. Thus, the TBC system is exposed to thermal fatigue owing to the mismatch between the thermal expansions of the ceramic top coat and metallic bond coat. The durability of the TBC decreases with repeated thermal fatigue and degradation under high-temperature conditions, which can eventually result in failure. Therefore, the life of the TBC should be predicted while considering degradation and thermal fatigue. In this study, TBC specimens were produced under different degradation and thermal fatigue conditions, and the bond test was performed on these specimens. Based on the bond test results, the life of the TBC was predicted according to degradation and thermal fatigue.
ISSN:2234-7593
2005-4602
DOI:10.1007/s12541-016-0031-y