期刊
METALS AND MATERIALS INTERNATIONAL
卷 7, 期 6, 页码 557-563出版社
KOREAN INST METALS MATERIALS
DOI: 10.1007/BF03179254
关键词
thermal barrier coatings; detonation gun spray technique; coating defects; thermal fatigue
The effects of coating defects, such as pores and cracks, on the thermal fatigue behavior of zirconia based thermal barrier coatings (TBCs) have been investigated. Duplex TBCs, which are composed of an 8 wt.% Y2O3 stabilized ZrO2 (YSZ) layer on top of a NiCrAlY bond layer were produced by detonation gun spraying. Thermal fatigue tests were conducted on three different TBC specimens, the YSZ layers of which were varied in terms of porosity and crack morphology, and failure analyses were subsequently carried out on the tested specimens. From these results, the roles of the defects on the thermal and mechanical degradation behavior of the TBCs were investigated.
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