| Title | A quasi-2D material CePO4 and the self-lubrication in micro-arc oxidized coatings on Al alloy |
| Authors | Chen, Pinghu Wu, Zhongzhen Huang, Qian Ji, Shunping Weng, Yuchang Wu, Zhongcan Ma, Zhengyong Chen, Xin Weng, Mouyi Pu, Ricky K. Y. Lin, Hai Tian, Xiubo Pan, Feng Chu, Paul K. |
| Affiliation | Peking Univ, Sch Adv Mat, Shenzhen Grad Sch, Shenzhen 518055, Peoples R China City Univ Hong Kong, Dept Phys, Kowloon, Tat Chee Ave, Hong Kong, Peoples R China City Univ Hong Kong, Dept Mat Sci & Engn, Kowloon, Tat Chee Ave, Hong Kong, Peoples R China |
| Keywords | Self-lubrication Cerium phosphate Micro-arc oxidation Al alloys |
| Issue Date | 2019 |
| Publisher | TRIBOLOGY INTERNATIONAL |
| Abstract | Micro-arc oxidation (MAO) is a popular coating technology for aluminum alloys, but the wear resistance and friction properties are limited by the intrinsic properties of the alumina coatings with high friction coefficients. In this work, CePO4 is identified as a quasi-2D material by the first principle calculation. As a self-lubricating phase, it is firstly formed in situ during the oxidation process and the lubrication mechanism is investigated. Nano-grains of cerium phosphate are formed and imbedded uniformly in the alumina coatings. With increasing Ce contents, the friction coefficients diminish to 0.1-0.15 during the 5-h test without obvious fluctuation. The results reveal the new concept of using self-lubricating additives in MAO oxide on Al alloys to improve the durability and mechanical properties. |
| URI | http://hdl.handle.net/20.500.11897/544927 |
| ISSN | 0301-679X |
| DOI | 10.1016/j.triboint.2019.05.030 |
| Indexed | SCI(E) EI |
| Appears in Collections: | 新材料学院 |
