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the application of thermal barrier coatings (tbcs) always undergo severe environment, concluding hot corrosion, high temperature oxidation and higher stress, which result in the failure of tbcs. the study of failure mechanisms of tbcs under various combined environmental factors, different with single factor, is more significant to further promote the applications of tbcs. In the present work, the combined effect of thermal shock and hot corrosion on the failure of tbcs was highlighted investigated. the 8wt.% yttria stabilized zirconia (8YsZ) thermal barrier coatings on a GH2132 alloy were deposited by air plasma spraying. the results showed that the transformation of ZrO2 from tetragonal phase to monoclinic phase induced internal stress in the topcoat, when combined with the thermal stress, the topcoat even the bondcoat were both cracked. the main failure of tbcs under the combined effect was in the form of penetrating crack to the bondcoat/substrate interface and oxidation at the penetrating crack front. ArtIcLE INFO

Combined effect of thermal shock and hot corrosion on the failure of yttria stabilized zirconia thermal barrier coatings