中国激光, 2019, 46 (2): 0203003, 网络出版: 2019-05-09
激光表面织构化生物陶瓷涂层及其摩擦磨损性能 下载: 1239次
Textured Surface on a Bioceramic Coating via a Femtosecond Laser and its Friction and Wear Properties
飞秒激光加工 表面织构 HA复合陶瓷涂层 润滑模型 摩擦磨损性能 femtosecond laser processing textured surface HA composite ceramic coating lubrication model friction and wear property
摘要
基于Reynolds方程和P-C(Patir and Cheng)模型,分别建立了织构表面在流体动压润滑及混合润滑状态下的理论模型。采用有限差分法并结合数值迭代,利用Matlab编程对模型进行计算,获得计算域内的压力分布和织构表面的理论摩擦系数,以此作为织构表面摩擦学性能的判断标准。采用飞秒激光加工工艺,在氧化锆(ZrO2)增强HA(Hydroxyapatite,羟基磷灰石)生物陶瓷涂层表面,加工出具有不同排布方式的椭圆形织构阵列和不同面覆率的圆形织构阵列。在往复实验平台进行摩擦磨损实验,利用三维轮廓仪表征涂层的磨损深度,并验证了数值模型。
Abstract
Numerical models of a textured surface under hydrodynamic and mixed lubrication conditions are established , respectively, based on the Reynolds equation and the P-C (Patir and Cheng) model. The models are solved via Matlab programming using the finite difference method combined with numerical iteration. The pressure distribution in the calculation domain and the theoretical friction coefficient of the textured surface are obtained, which are used as the criteria for judging the tribological properties of the textured surface. To explore the coating design parameters for improved wear resistance, an elliptical texture with different arrays and a circular texture with different coverage ratios are processed using a femtosecond laser on the surface of a zirconia-reinforced hydroxyapatite bioceramic coating. The friction and wear tests are conducted on a reciprocating test platform. The wear depth of the coating is characterized by a three-dimensional profiler, and the proposed numerical models are verified.
鲍雨梅, 王成武, 金志伟, 吴霄, 鲍佳峰. 激光表面织构化生物陶瓷涂层及其摩擦磨损性能[J]. 中国激光, 2019, 46(2): 0203003. Yumei Bao, Chengwu Wang, Zhiwei Jin, Xiao Wu, Jiafeng Bao. Textured Surface on a Bioceramic Coating via a Femtosecond Laser and its Friction and Wear Properties[J]. Chinese Journal of Lasers, 2019, 46(2): 0203003.