Ultra-short pulsed laser irradiation with a fluence H of 3.7 J·cm⁻², pulse duration τ of 220 fs and 50 shots per spot affected a special and unique combination of surface features on a-C:H coated medical grade CoCrMo. The average dimple depth was calculated to be 5.09 ± 0.41 μm, which is much deeper than the a-C:H coating thickness of 2.5 μm on CoCrMo. Laser induced periodic surface structures (LIPSS) were generated on sections of the bottom of each laser dimples. LIPSS are considered to have an antibacterial effect. As proven by Raman spectroscopy, a small region at the edges of the laser dimples is graphitised only. During sliding of a (CrN + a-C:H) coated ball against the μ-patterned a-C:H coated CoCrMo, graphitised fractions determined the friction and wear under dry conditions. Using hyaluronic gel as a lubricant, the coefficient of friction was 0.08 and showed a uniform curve over the sliding time. Furthermore, the round laser dimples with a distance of 60 μm served as lubricant reservoir. The DLC coated balls are more sensitive in hyaluronic gel and showed the higher wear rate of 2.67 · 10⁻⁷ mm³/N·m, which is the highest wear rate measured during this study. On the contrary, the CoCrMo with μ-patterned DLC revealed a wear rate of 0.40 · 10⁻⁷ mm³/N·m only, if there is hyaluronic gel lubrication.

能量密度H为3.7 J·cm ^-2的超短脉冲激光辐照，脉冲持续时间τ为220 fs，每个光斑50个光斑影响了aC：H涂层医用级CoCrMo的表面特征的特殊和独特组合。平均凹痕深度经计算为5.09±0.41μm，比在CoCrMo上的aC：H涂层厚度2.5μm深得多。激光诱导的周期性表面结构（LIPSS）在每个激光凹坑底部的部分上生成。LIPSS被认为具有抗菌作用。如拉曼光谱法所证明的，激光凹痕边缘的一小部分仅被石墨化。在（CrN + aC：H）涂层的球相对于μ图案的aC：H涂层的CoCrMo滑动时，石墨化的分数决定了干燥条件下的摩擦和磨损。使用透明质酸凝胶作为润滑剂，摩擦系数为0.08，并且在滑动时间内显示出均匀的曲线。此外，距离为60μm的圆形激光凹痕用作润滑剂储存器。涂有DLC的球对透明质酸凝胶更敏感，并显示出2.67·10的较高磨损率^-7  mm ³ / N·m，是该研究中测量的最高磨损率。相反，如果采用透明质酸凝胶润滑，则具有μ图案DLC的CoCrMo的磨损率仅为0.40·10 ^-7  mm ³ / N·m。