摘要
采用阳极氧化法在Ti6Al4V骨螺钉表面制备了二氧化钛纳米管(TNTs)涂层,针对TNTs涂层与基底结合强度较低的问题,通过磷酸阳极氧化在TNTs涂层和基底界面处制备了致密的氧化层,提高了TNTs涂层与基底的结合强度。借助场发射扫描电子显微镜、纳米压痕仪、微动摩擦磨损试验机以及拧入-旋出猪胫骨实验,分析了TNTs涂层的微观结构、力学性能、微动磨损性能及机械稳定性。结果表明,在骨螺钉表面制备的TNTs涂层结构紧凑、排列有序,改善了骨螺钉的力学性能,缓解了植入物植入后的应力屏蔽,并且显著提高了Ti6Al4V合金的微动磨损性能,有效避免了在植入过程中的分层和剥落。
A titania nanotubes(TNTs)coating was prepared on the surface of Ti6Al4V bone screw by anodic oxidation method.In view of the poor bonding strength between TNTs coating and substrate,a compact oxide layer was prepared at the interface between TNTs coating and substrate by anodic oxidation in phosphoric acid electrolyte to improve the bonding of TNTs coating to the substrate.The microstructure,mechanical properties,fretting wear behavior,and mechanical stability of the TNTs coating were analyzed by field emission scanning electron microscopy,nanoindenter,fretting friction and wear tester,and screwing test with pig tibia.The results showed that the TNTs coating prepared on the surface of bone screw had a compact structure with orderly arrangement,which improved the mechanical properties of bone screw,alleviated the stress shielding after implantation,and significantly improved the fretting wear property of Ti6Al4V alloy,preventing delamination and exfoliation effectively during implantation.
作者
刘飞
海几哲
单春龙
郑用林
王浩
LIU Fei;HAI Jizhe;SHAN Chunlong;ZHENG Yonglin;WANG Hao(School of Mechanical Engineering,Xinjiang University,Urumqi 830000,China;State Key Laboratory for Manufacturing Systems Engineering,Xi’an 710000,China;Sixth Affiliated Hospital of Xinjiang Medical University,Urumqi 830000,China)
出处
《电镀与涂饰》
CAS
北大核心
2022年第12期825-832,共8页
Electroplating & Finishing
基金
国家自然科学基金资助项目(52165026)
机械制造系统工程国家重点实验室资助项目(sklms2021011)
国家大学生创业训练计划资助项目(202010755011X)。
关键词
钛合金
骨螺钉
阳极氧化
二氧化钛纳米管
结合强度
力学性能
titanium alloy
bone screw
anodic oxidation
titania nanotube
bonding strength
mechanical property
