Effects of the powder manufacturing method on microstructure and wear performance of plasma sprayed alumina-titania coatings |
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Authors: | Meidong Wang Leon L. Shaw |
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Affiliation: | a Department of Materials Science and Engineering University of Connecticut, Storrs, CT 06269, USA b Inframat Advanced Materials 74 Batterson Park Road, Farmington, CT 06032, USA |
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Abstract: | Three Al2O3-13wt.% TiO2 powders, with the same chemical composition but different Al2O3-TiO2 distribution patterns, are plasma sprayed and the resulting coatings are compared in terms of their phase composition, microstructure, hardness, crack growth resistance, and abrasive wear performance. It is demonstrated that the degree of mixing of the Al2O3 and TiO2 ingredients in the feed powder has immense impact on the phase composition, microstructure, hardness, crack growth resistance, and abrasive wear performance of the coatings. A high degree of mixing of Al2O3 and TiO2 in the powder state results in more uniform microstructure, higher hardness, higher crack growth resistance, and consequently better abrasive wear resistance of the coating. |
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Keywords: | Thermal spray Alumina-titania coatings Wear resistance Thermal spray powder Toughness |
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