Preparation and characterization of plasma sprayed Ni3Al-hBN composite coating
Preparation and characterization of plasma sprayed Ni3Al-hBN composite coating
复制标题
DOI：
10.1016/j.surfcoat.2010.09.036
复制
发表时间：
2010-12-25
影响因子：
5.4
通讯作者：
Zhang, Jingmin
中科院分区：
文献类型：
--
作者：
Du, Lingzhong;Zhang, Weigang;Zhang, Jingmin
采用喷雾干燥技术制备了Ni 3Al-hBN复合粉末，并采用等离子喷涂技术制备了Ni 3Al-hBN涂层。研究了hBN添加量对复合粉末的流动性、松装密度以及喷涂层的力学性能和摩擦学性能的影响。结果表明，采用喷雾干燥技术可以成功制备出成分分布均匀的球形粉体。随着hBN含量的增加，Ni 3Al-hBN复合粉末的流动性、松装密度以及复合涂层的结合强度和硬度均降低。添加小于10重量%的hBN降低了镀层的摩擦系数和脆性断裂，有利于提高Ni 3Al-hBN复合镀层的摩擦学性能。然而，高的hBN添加，破坏涂层中的结合，将劣化涂层的耐磨性。含10%hBN的Ni 3Al-hBN复合镀层具有最佳的强度、硬度和摩擦学性能。(C)2010 Elsevier B. V.保留所有权利。
Ni3Al-hBN composite powders were manufactured by spray drying technology, and then plasma sprayed to form the coatings. The influence of hBN addition amount on the flowability and apparent density of the composite powders, as well as the mechanical and tribological properties of the as-sprayed coatings was evaluated. The results indicate that the spherical powders with uniformly distributed compositions are successfully manufactured by spray drying technology. Both the flowability and apparent density of the Ni3Al-hBN powders, as well as the bond strength and hardness of the composite coatings decrease with the increase of hBN content. Addition of hBN less than 10 wt.% reduces the friction coefficient and brittle fracture of the coatings, which is beneficial to improve the tribological properties of the Ni3Al-hBN composite coatings. However, high hBN addition, damaging the bond in the coating, will deteriorate the wear resistance of the coating. The Ni3Al-hBN composite coating containing 10%hBN shows the optimum properties combining strength and hardness with tribological properties. (C) 2010 Elsevier B.V. All rights reserved.