| DING Lan,HE Zhi-yong,BAO Ming-dong,XU Xue-bo,WU Ming-ying,ZHANG Ying.Dry Friction and Wear Properties of Graphite-like Carbon Films of Different Ti Content[J],46(6):131-137 |
| Dry Friction and Wear Properties of Graphite-like Carbon Films of Different Ti Content |
| Received:January 20, 2017 Revised:June 20, 2017 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2017.06.020 |
| KeyWord:Ti-doped graphite-like carbon films microstructure mechanical properties friction coefficient wear rate wear mechanism |
| Author | Institution |
| DING Lan |
1.Taiyuan University of Technology, Taiyuan , China; 2.Ningbo University of Technology, Ningbo , China |
| HE Zhi-yong |
Taiyuan University of Technology, Taiyuan , China |
| BAO Ming-dong |
Ningbo University of Technology, Ningbo , China |
| XU Xue-bo |
Ningbo University of Technology, Ningbo , China |
| WU Ming-ying |
Ningbo Zhengyuan Copper Alloy Co., Ltd, Ningbo , China |
| ZHANG Ying |
Ningbo Zhengyuan Copper Alloy Co., Ltd, Ningbo , China |
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| Abstract: |
| The work aims to improve dry tribological property of high speed steel and study influence of different Ti content on tribological property of graphite-like carbon films. Graphite-like carbon films of different Ti content were fabricated with unbalanced magnetron sputtering ion plating technology. Microstructures and mechanical properties of the films were characterized with optical microscope, scanning electron microscopy, Raman spectrometer, Rockwell hardness tester and nanoindentor. Dry tribological properties of the films were detected with high-speed linear reciprocating abrasion testing machine. Grinding cracks were observed with optical microscopy. The prepared carbon film surface particles were in small size, the cross section was compact and tended to be columnar structure. With the increase of Ti target sputtering current, the increasing Ti element interrupted growth of sp3 bond, leading to the generation of more stable sp2 bond. The sp2 bond content first increased and then decreased, reaching the maximum at 0.8 A. At the current of 1.1 A, Ti content reached the maximum, both the sp2 bond and sp3 bond decreased. Adherence between the carbon film and substrate first increased and then decreased as Ti target current increased, reaching the optimum value (of about grade HF3) at 0.8 A. Hardness and elastic modulus first decreased and then increased, reaching the minimum at 0.8 A. Friction coefficient of the carbon films was lower than that of M42, ranging from 0.09 to 0.12. Wear rate first increased and then decreased, maintaining at nearly (5~15)×10−16 m3/(N•m). Graphite-like carbon films of different Ti content can reduce adhesive wear caused by mutual abrasion between high speed steel and steel ball significantly, therefore decreasing the friction coefficient and wear rate. |
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