Abstract
Ti and Ti alloys with low elastic modulus, good mechanical properties and biocompatibility have been widely used for dental implant, arthroplasty and internal fixation material in spinal fusion. But the poor wear resistance of Ti and Ti alloys generally results in the aseptic loosening of the implants. TiN coating has good chemical stability and biocompatibility in physiological environment and plays an important role in improving the corrosion wear performance of Ti and Ti alloys. However, the adhesion strength of TiN film prepared by traditional technologies does not meet the requirement of long service life of the implants. In this work, the alternating Ti/TiN multilayer films were prepared by magnetron sputtering technology with constant Ti layer thickness and varying TiN layer thickness. The cycling periods were designed to be 1, 3, 6, 9, and 12. The total depositing time was 185 min. The main aims of this investigation were to clarify the effects of the cycling periods on the surface morphologies, hardness, bonding strength, friction and abrasion behavior in simulated body fluid of Ti/TiN multilayer films. The results show that the total thickness of Ti/TiN multilayer film is in the range of 5.5~6.0 mm. (111)TiN preferred orientation is found in TiN monolayer film, and (002)TiN preferred orientation is found in Ti/TiN multilayer films. In comparison with TiN monolayer film, Ti/TiN multilayer films exhibit lower surface roughness, higher hardness, bonding strength and wear resistance. The strengthening and toughening of Ti/TiN multilayer films result from the re*教育部科学技术研究重大资助项目313014 收到初稿日期: 2015-03-02,收到修改稿日期: 2015-06-10 作者简介:崔文芳,女, 1963年生,教授 DOI: 10.11900/0412.1961.2015.00115 第1531-1537页 pp.1531-1537
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