Ultrasound-assisted electrodeposition of thin nickel-based composite coatings with lubricant particles
Ultrasound-assisted electrodeposition of thin nickel-based composite coatings with lubricant particles
复制标题
DOI：
10.1016/j.surfcoat.2015.06.030
复制
发表时间：
2015-08
影响因子：
5.4
通讯作者：
I. Tudela;Yi Zhang;M. Pal;I. Kerr;A. Cobley
中科院分区：
文献类型：
--
作者：
I. Tudela;Yi Zhang;M. Pal;I. Kerr;A. Cobley
在不添加表面活性剂的情况下，在铜表面超声电沉积了hBN和WS2颗粒组成的镍复合镀层。虽然机械搅拌和超声波的结合产生了最好的分散性，但在电镀过程中单独使用超声波可以得到颗粒分布更均匀的镀层。用不同的方法对超声电沉积Ni/hBN和Ni/WS2复合镀层进行了表征：用Gd-OES分析颗粒含量，用X射线衍射法分析择优取向，用FIB-SEM分析表面形貌和微观结构，用显微硬度计测量硬度。Ni/hBN复合镀层与纯Ni镀层相比差异不大，但WS2的加入对镀层的择优取向、表面形貌和晶粒尺寸有显著影响，使Ni的晶粒度细化到纳米级。后者对涂层的硬度有显著的影响，尽管WS2颗粒具有“软”的性质。
Thin Ni composite coatings with hBN and WS2particles were ultrasonically-electrodeposited on Cu with no need of a surfactant. Although the combination of mechanical agitation and ultrasound yielded the best dispersions, ultrasound on its own during plating yielded coatings with a more uniform distribution of particles. Ni/hBN and Ni/WS2composite coatings electrodeposited under ultrasound were characterised by different methods: GD-OES to estimate particle content, XRD to analyse the preferred orientation, FIB-SEM to analyse the surface morphology and microstructure, and microhardness tests to measure the hardness. Whereas Ni/hBN composite coatings showed little difference compared to pure Ni deposits, the incorporation of WS2into Ni had a significant effect on the preferred orientation, the surface morphology and the grain size of the coatings, refining the Ni crystal down to the nano-scale. The latter had a significant effect in the hardness of the coatings, despite the ‘soft’ nature of the WS2particles.