Abstract:Yttria stabilized nanostructured zirconia (YSZ) thermal barrier coating was produced using atmospheric plasma spraying. The microstructure, grain size, and phase composition of the resulting coating w...Yttria stabilized nanostructured zirconia (YSZ) thermal barrier coating was produced using atmospheric plasma spraying. The microstructure, grain size, and phase composition of the resulting coating were analyzed by means of scanning electron microscopy and X-ray diffraction. The thermal shock resistance was evaluated. It was found that there existed a great deal of un-molten particulates of an average size 51.8 nm and many tiny pores of a diameter below 1 μm in the as-prepared YSZ thermal barrier coating. At the same time, the coating was composed of cubic and tetragonal phases of zirconia and had little penetration cracks, which were beneficial to improving the thermal shock resistance of the coating. Namely, no signs of peeling-off were observed in the YSZ thermal barrier coating, after it was heated and held there for 10 min and cooled in air for 5 min within room temperature to 1 000 ℃ for 800 thermal cycles.Read More
Publication Year: 2006
Publication Date: 2006-01-01
Language: en
Type: article
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