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Thermal Cycling of Suspension Plasma Sprayed Alumina‐ YSZ Coatings Containing Amorphous Phases

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Thermal cyclic test at 1080°C for various numbers of cycles was performed on suspension plasma‐sprayed coatings of alumina‐yttria‐stabilized zirconia composites and yttria‐stabilized zirconia ( YSZ ). The structural variations of composite coatings were studied to verify the possibility of production of nano‐composite coatings with nano‐dispersed oxides. The results showed that this composite exhibited a lower thermally grown oxide growth than that of the YSZ . New multi‐constituent composites formed of alternative regions of nano‐precipitates of alumina in zirconia matrix and nano‐precipitates of zirconia in alumina matrix were developed via phase transformation through thermal cyclic process of amorphous‐containing structure.

Document Type: Research Article


Publication date: 2012-08-01

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