Surface structuring to reduce friction & wear at low congruency ceramic sliding pairings

长期目标是普遍使用纹理陶瓷-陶瓷轴承对进行人工关节置换，以提高假体的耐用性。作为申请研究项目的一部分，通过对其作用机理的分析，确定并优化了具有良好润滑条件和减摩性能的表面结构。为此，应该开发一个复杂的、经过验证的仿真模型来模拟实验测试装置，以分析关于表面形貌和润滑条件之间的作用机制的各种结构，并得出与主动载荷集体有关的最佳表面结构。其目的是逐渐接近解剖关节的几何形状和生物力学载荷集合，以便仔细评估不同结构的影响。模拟结果将通过实验摩擦磨损试验进行不断的验证和补充。在应用研究项目中，还应考虑初步研究的结果，其中，对于表面压力低、具有凹陷结构的平面对平面构型，可以实现23%的减摩和48%的减磨。其目的是在复杂的生物力学载荷下实现低一致性接触。最终摩擦减少40%，磨损减少60%

The long-term objective is the universal use of textured ceramic-ceramic bearing couples for artificial joint replacement in order to improve the durability of the protheses. As part of the research project applied for, surface structures for favorable lubrication conditions and reduced friction are to be defined and optimized by analyizing the mechanisms of action. For this purpose, a complex an validated simulation model imitating an experimental test setup should be developed to analyze a variety of structures with regard to the mechanisms of action between the surface topography and the lubrication conditions and to derive optimal surface structures respecting active load collectives. The aim is to gradually approximate the geometry of anatomical joints and biomechanical load collectives in order to carefully evaluate the influence of varying structures. The simulation results are to be continously verfied and complimented by experimental friction and wear tests. In the applied research project, the results of the preliminary study should also be taken into account where for a flat-on-flat configuration with low surface pressure and dimple structuring, a friction reduction of 23% and a wear reduction of 48% could be achieved. The aim is to achieve for low-congruent contacts under complex, biomechanical load collectives. a final friction reduction of 40% and a reduction in wear of 60%