Microstructural, mechanical and tribological properties of suspension plasma sprayed YSZ/h-BN composite coating
Microstructural, mechanical and tribological properties of suspension plasma sprayed YSZ/h-BN composite coating
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DOI：
10.1016/j.jeurceramsoc.2018.06.007
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发表时间：
2018-10
影响因子：
5.7
通讯作者：
Yongli Zhao;Yan Wang;Zexin Yu;M. Planche;F. Peyraut;H. Liao;Audrey Lasalle;A. Allimant;G. Montavon
中科院分区：
文献类型：
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作者：
Yongli Zhao;Yan Wang;Zexin Yu;M. Planche;F. Peyraut;H. Liao;Audrey Lasalle;A. Allimant;G. Montavon
陶瓷涂层的脆性、较高的摩擦系数和磨损率限制了其作为耐磨涂层的应用。然而，由于嵌入添加剂与陶瓷基体已被证明是一种有效的方式，以改善涂层性能，不同的含量和大小的h-BN添加到YSZ悬浮液。采用悬浮等离子喷涂技术制备了YSZ/h-BN复合涂层，并对其摩擦学性能进行了分析。结果表明：（1）h-BN的引入可以降低YSZ涂层的摩擦系数和磨损率。（2）h-BN颗粒越细，涂层的摩擦学性能越好。iii）最佳含量取决于h-BN颗粒尺寸。（4）随着h-BN夹杂物含量的增加和尺寸的增大，显微硬度的概率分布呈现双峰分布。总结了三种磨损表面状态，并对其磨损机理进行了探讨。
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.