| LIU Qi,CHENG Jiang-bo,FENG Yuan,LIANG Xiu-bing,CHEN Yong-xiong,HU Zhen-feng.Wear Behaviors of As-sprayed AlSiFeMm Amorphous/Nanocrystalline Coating in Different Environments[J],48(4):75-83 |
| Wear Behaviors of As-sprayed AlSiFeMm Amorphous/Nanocrystalline Coating in Different Environments |
| Received:December 05, 2018 Revised:April 20, 2019 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2019.04.011 |
| KeyWord:Al-based amorphous/nanocrystalline coating dry sliding tribocorrosion wear mechanism |
| Author | Institution |
| LIU Qi |
1.School of Mechanics and Materials, Hohai University, Nanjing , China |
| CHENG Jiang-bo |
1.School of Mechanics and Materials, Hohai University, Nanjing , China; 2.Academy of Military Science PLA China, National Innovation Institute of Defense Technology, Beijing , China |
| FENG Yuan |
1.School of Mechanics and Materials, Hohai University, Nanjing , China |
| LIANG Xiu-bing |
2.Academy of Military Science PLA China, National Innovation Institute of Defense Technology, Beijing , China |
| CHEN Yong-xiong |
2.Academy of Military Science PLA China, National Innovation Institute of Defense Technology, Beijing , China |
| HU Zhen-feng |
2.Academy of Military Science PLA China, National Innovation Institute of Defense Technology, Beijing , China |
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| Abstract: |
| The work aims to investigate the sliding wear behaviors of the AlSiFeMm (Mm is Ni-wrapped rare earth elements) amorphous/nanocrystalline coating under dry friction and 3.5%NaCl solution conditions. Rtec (MFT-3000) reciprocating ball-on-block tester was used to measure tribological properties of the coating under dry friction and corrosive medium. The wear volumes and 3-dimensional profiles of worn tracks of the coating were measured by LEXT OL 3000-IR non-contact three-dimensional surface profilometer. The worn surface morphology and components were analyzed by scanning electron mi-croscopy (SEM). The friction coefficient of Al-based amorphous/nanocrystalline coating decreased with the increase of load. Under dry friction conditions, the wear rate of coating increased with the increase of load. The wear resistance of the coating was about 2.5 times that of the 6061-Al alloy with sliding speed of 10 mm/s and load of 15 N. The wear mechanism was brittle flaking, abrasive wear and oxidative wear. In 3.5%NaCl solution, the wear rate of the coating gradually decreased with the increase of load. When the sliding speed was 35 mm/s and load was 30 N, the wear resistance of the coating in corrosive medium was about 8 times that of 6061-Al alloy. The wear mechanism of the coating was delamination and corrosion damage. The Al-based amorphous/nanocrystalline coating has excellent wear resistance in dry friction and corrosive media, and can be used as a lightweight alloy coating in the field of surface protection. |
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