| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 8023511 | Surface and Coatings Technology | 2018 | 25 Pages |
Abstract
The present study focuses on the influence of substrate roughness on the vacuum tribological properties of PEO/Bonded-MoS2 coatings on Ti-6Al-4V. Four different surface conditions of Ti-6Al-4V coupons, namely Ra being 0.8, 1.6, 3.2 in as-machined conditions, and Ra 1.6 post-treated by sandblasting, were used as substrates. A ball-on-disk tribometer was used to evaluate the vacuum tribological performances of the coated samples. Results showed that the Ra 1.6 sample exhibited the longest anti-wear life, which were attributed to two causes: a hard PEO coating and a special PEO topography with grooves and ridges. The grooves provided 'reservoirs' of MoS2, and the ridges acted as hard anti-wear “phases”. The particular wear mechanism and the effects of roughness were proposed and discussed in this study.
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Hu Hanjun, Cao Zhen, Liu Xingguang, Feng Xingguo, Zheng Yugang, Zhang Kaifeng, Zhou Hui,