Effect of thermal processing on the tribology of nanocrystalline Ni/TiO2 coatings

被引：26

作者：

Cooke K.O. ^{[1
,2
]}

Khan T.I. ^{[1
]}

机构：

[1] Faculty of Engineering and Informatics, University of Bradford, Richmond Road, Bradford

[2] School of Engineering, University of Technology, 237 Old Hope Road, Kingston, WI

来源：

Emergent Materials | 2018年 / 1卷 / 3-4期

关键词：

Co-electrodeposition; Heat treatment; Nanocrystalline; Sliding wear;

D O I：

10.1007/s42247-018-0015-z

中图分类号：

学科分类号：

摘要：

The tribological performance of a nanocrystalline coating is heavily influenced by its composition, morphology, and microstructural characteristics. This research work describes the effect of heat treatment temperature on the microstructural, morphological, and mechanical behavior of nanocrystalline Ni/TiO2 coatings produced by electrophoresis. The surface morphology and coating cross section were characterized by scanning electron microscopy (SEM). The composition of coatings and the percentage of TiO2 nanoparticles incorporated in the Ni matrix were studied and estimated by using an energy-dispersive spectroscopic (EDS) analysis, while x-ray diffractometry (XRD) was used to investigate the effect of heat treatment temperature on phase structure. The results showed agglomeration of TiO2 nanoparticles on the surface of the coating. The high hardness and wear resistance recorded for the as-deposited coating was attributed to the uniform distribution of TiO2 nanoparticle clusters throughout the cross section of the coating. Heat treatment of the Ni/TiO2 coatings to temperatures above 200 °C led to significant grain growth that changed the surface morphology of the coating and reduced the strengthening effects of the nanoparticles, thus causing a reduction in the hardness and wear resistance of the coatings. © 2018, The Author(s).

引用

页码：165 / 173

页数：8

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