钛珠涂层和羟基磷灰石涂层与皮质骨界面的切向微动损伤研究  

Tangential Fretting Wear of Cortical Bone Interface between Titanium Bead Coating and Hydroxyapatite Coating

作　　者：冯存傲 张德坤[1] 陈凯[1] 牛家墨 FENG Cunao;ZHANG Dekun;CHEN Kai;NIU Jiamo(School of Materials and Physics,China University of Mining and Technology,Jiangsu Xuzhou 221116,China;School of Mechatronic Engineering,China University of Mining and Technology,Jiangsu Xuzhou 221116,China)

机构地区：[1]中国矿业大学材料与物理学院,江苏徐州221116 [2]中国矿业大学机械工程学院,江苏徐州221116

出　　处：《摩擦学学报》2022年第6期1148-1160,共13页Tribology

基　　金：国家自然科学基金项目(51875564)资助。

摘　　要：通过体外模拟切向微动行为,探究两种生物固定材料-钛珠涂层和羟基磷灰石涂层与皮质骨界面之间的微动摩擦磨损机理,建立钛珠涂层和羟基磷灰石涂层与骨组织生物固定界面的微动-松动-骨损伤的关系.结果表明,界面处于部分滑移区时,弹塑性协调作用起主导,固定界面不易产生松动,皮质骨表面损伤以剥落为主,表面损伤较小.增大微动位移幅值,界面摩擦系数增大,皮质骨的损伤增大.同时,划分出了钛珠涂层和羟基磷灰石涂层部分滑移区的工况分界线.通过对比两种材料的摩擦磨损机理,钛珠涂层与皮质骨界面固定效果较好,羟基磷灰石涂层与皮质骨界面损伤较小.结果对人工关节生物固定起到一定的参考作用.Fretting wear is the main cause of loosening between the artificial joint biological fixing material and the bone tissue.Through simulating the tangential fretting behavior in vitro,the fretting wear mechanism between two biological fixing materials(titanium-bead coating and hydroxyapatite coating)and cortical bone interface was explored.The lubrication condition was 25%calf serum to simulate the joint lubrication in the human body.A self-made multifunctional friction and wear testing machine was used to carry out the tangential fretting friction and wear experiment.By changing the fretting load and amplitude,it simulated the different tangential fretting state of the implant and bone interface in the daily life of the human body in vitro.The surface morphology and surface profile after wear were observed and analyzed.The influence of different parameters on the fretting wear of the fixed interface was studied,and the mechanism of the fretting wear of the interface was explored.The relationship between fretting,loose and bone injury of biological fixation interface was established.The results showed that under large displacement amplitude and small normal load,the interface was in the gross slip zone,which was dominated by abrasive wear.There were a lot of cracks and wear debris on the surface of the cortical bone,and the fixed interface was easy to loosen,which was not conducive to biological fixation.When the normal load and the small displacement amplitude were larger,the interface was in the partial slip zone,and the elastic-plastic coordination between the interfaces was dominant.In the partial slip zone,the friction interface was stable,and the corresponding working condition was the non-slip zone.The main wear mechanism was spalling.It was advantageous for the artificial joint biological fixation interface.As the amplitude of the fretting displacement increased,the interface friction coefficient increased,and the damage of cortical bone increased.As the normal load increased,the interface friction coeffici

关 键 词：钛珠涂层 羟基磷灰石涂层 微动磨损 骨界面 生物固定材料 

分 类 号：TH117.1[机械工程—机械设计及理论]