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4666 |
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Dense YSZ coatings fabricated by plasma spray-physical vapor deposition |
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Fang Shao* / Shanghai Institute of Ceramics, Chinese Academy of Sciences, China Huayu Zhao / Shanghai Institute of Ceramics, Chinese Academy of Sciences, China Chengguang Liu/ Shanghai Institute of Ceramics, Chinese Academy of Sciences, China Xinghua Zhong/ Shanghai Institute of Ceramics, Chinese Academy of Sciences, China Yin Zhuang/ Shanghai Institute of Ceramics, Chinese Academy of Sciences, China Jinxing Ni/ Shanghai Institute of Ceramics, Chinese Academy of Sciences, China Shunyan Tao/ Shanghai Institute of Ceramics, Chinese Academy of Sciences, China |
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Plasma spray-physical vapor deposition (PS-PVD) is a novel technique which can improve coating density and surface characteristics. In the present study, dense YSZ coatings were deposited using PS-PVD with equitable process parameters. The spray distances were changed from 500 mm to 900 mm at intervals of 100 mm and the effects of spray distances and off-sets (along axial and radial directions of the torch) on the microstructure of the as-sprayed coatings were discussed. The phase composition, microstructure development, mechanical properties of PS-PVD YSZ coatings were explored. The as-sprayed coatings have dense lamellar structures and the phase was not exactly the same as that of the coatings obtained by conventional atmospheric plasma spraying (APS) technique. The thickness, hardness (H) and Youngs modulus (E) of the coatings were all changed as a function of spray distance. This basic research might provide some useful insight for the possible application of dense PS-PVD YSZ coatings. |