Microstructural,mechanical and tribological properties of suspension plasma sprayed YSZ/h-BN composite coating |
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Authors: | Yongli Zhao Yan Wang Zexin Yu Marie-Pierre Planche François Peyraut Hanlin Liao Audrey Lasalle Alain Allimant Ghislain Montavon |
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Affiliation: | 1. ICB UMR 6303, CNRS, Université de Bourgogne Franche-Comté, UTBM, 90010, Belfort, France;2. Saint-Gobain C.R.E.E., 84300, Cavaillon, France |
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Abstract: | Brittleness, relative high friction coefficient and wear rate limit the applications of ceramic coatings as wear-resistant layers. However, because embedding additives with ceramic matrix has demonstrated to be an effective way to improve coating performances, different contents and size of h-BN were added into an YSZ suspension. Afterwards, the YSZ/h-BN composite coatings were manufactured by suspension plasma spray and their tribological analysis indicated that: i) the reduction of the friction coefficient and wear rate can be achieved by incorporating h-BN into YSZ coating. ii) finer h-BN particle is more helpful to enhance the tribological properties of the coating. iii) the optimum content is dependent on h-BN particle sizes. iv) when the contents and the size of the h-BN inclusion increase, the probability distribution of the micro-hardness can become bi-modal. Three worn surface conditions were summarized and their wear mechanisms were discussed as well. |
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Keywords: | Microstructure Tribological properties Suspension plasma spray |
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