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| Formation and Friction Properties Investigation of Rare Earth Modified CNTs Film on Surface of Titanium Alloy Substrates |
FANG Lei1,XU Ying1,2,CHENG Xianhua1,3 |
| （1.School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China; 2.College of Information, Mechanical and Electronic Engineering, Shanghai Normal University, Shanghai 201418, China; 3.State Key Laboratory of Tribology (SKLT),Tsinghua University, Beijing 100084, China）
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Abstract The rare earth (RE) modified carbon nano-tubes (CNTs) self-assembled monolayers (CNTsSAM) was made on the surface of biomedical titanium alloy substrates. Scanning electron microscope (SEM) and X-ray photoelectron spectrometry (XPS) were used to characterize the surface appearance and the composition on the surface of titanium alloy substrates respectively. The tribological properties of the films were evaluated on a UMT-2MT reciprocating friction and wear tester. The results indicate that the RE modified CNTsSAM was successfully assembled on the surface of titanium alloy substrates. RE elements can significantly improve the surfaceproperties of CNTs and act as an adhesive between functional groups of CNTs and the substrate. RE modified CNTs-SAM not only has smaller coefficient of friction (0.13) against GCr15 but also has favorable anti-wearing properties.
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Received: 30 May 2012
Published: 28 May 2013
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