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- W2393907185 abstract "Thermal barrier coatings have been widely used in high temperature components such as aero engines and gas turbines.The failure mechanism and non-destructive failure testing are urgent to be solved in the research on thermal barrier coatings.Three groups of thermal barrier coating specimens were prepared using electron beam physical vapor deposition(EB-PVD)method.The thickness of the ceramic layer of the specimens are 180,120 and 90μm.The specimens were oxidized at 1 000℃for 0,1,10,50 hand 100h.The Raman spectroscopy of each sample surface was measured by HR800 laser Raman microscope.The crack and thermally grown oxide(TGO)thickness were observed using scanning electron microscopy(SEM).Results show that the cracks mainly initiate inside the ceramic layer and at the interface between the top coating(TC)and the bonding coating(BC).The probability of crack initiation at the interface between the BC and the substrate is relatively small.The growth of the oxidation layer decrease with the increase of ceramic thickness.The surface residual stresses will increase with the increase of ceramic layer thickness.The surface residual stress of the thermal barrier coating will also increase with the increase of the oxidation time.The reduction of the surface residual stress means the generation of the cracks or peelings." @default.
- W2393907185 created "2016-06-24" @default.
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- W2393907185 date "2015-01-01" @default.
- W2393907185 modified "2023-09-26" @default.
- W2393907185 title "Structure Evolution and Surface Raman Spectral Characteristics of EB-PVD Thermal Barrier Coatings" @default.
- W2393907185 hasPublicationYear "2015" @default.
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