The wear of the currently available artificial joints is unavoidable, and the long-term stability needs to be improved. However, the performance of the existing artificial joints suffers from high friction coefficient, large modulus difference and poor connectivity. In this study, a dual coupling bionic artificial joint structure exhibiting antiwear, toughness and high connectivity was developed, which effectively reduced the joint material friction coefficient without biological toxicity. The structure consisted of porous Ti6Al4V and high-entropy alloy coating with superior hardness. Both reciprocating friction test and fluid simulation analysis revealed significant antiwear performance of the structure, which was closely dependent on the pore size. The ball-disc reciprocating friction analysis under dry and biotic environmental conditions lead to a reduction of 37% and 35.7% respectively in the friction coefficient by employing the high-entropy alloy coating. The wear loss was the lowest in the case of 30 μm diameter of the pore-forming agent, as revealed through the fluid simulation of the structure. It is anticipated that the coupled biological artificial joint structure will prolong the service life of the artificial joints and provide a new alternative for clinical joint replacement.

当前可用的人造关节的磨损是不可避免的，并且长期稳定性需要改善。但是，现有的人工关节的性能受到摩擦系数高，模量差大和连通性差的困扰。在这项研究中，开发了一种具有抗磨性，韧性和高连通性的双偶合仿生人造关节结构，可有效降低关节材料的摩擦系数而无生物毒性。该结构由多孔Ti6Al4V和高硬度的高熵合金涂层组成。往复摩擦试验和流体模拟分析均显示出该结构显着的抗磨性能，这与孔径密切相关。在干燥和生物环境条件下的球盘往复摩擦分析通过采用高熵合金涂层，分别使摩擦系数降低了37％和35.7％。如通过结构的流体模拟所揭示的，在成孔剂直径为30μm的情况下，磨损损失最低。预期的是，耦合的生物人工关节结构将延长人工关节的使用寿命，并为临床关节置换提供新的选择。