As a widely used orthopedic implant, titanium alloy will face the corrosion of body fluid in human body. In addition, the wear of implants and bones in human body will also reduce the service life of implants. To improve the wear resistance and corrosion resistance of biological titanium alloy, Ti6Al4V alloy was modified by plasma nitriding and plasma-enhanced chemical vapor deposition (PN + PECVD) composite process, and then samples were ablated by nanosecond laser to form a regular surface texture. The textured Ti6Al4V and PN + PECVD samples marked as Ti6Al4V-T and PN + PECVD-T samples. The microstructure and phase composition of the samples before and after modification were observed by scanning electron microscope (SEM), energy-dispersive spectrometer (EDS) and X-ray diffraction (XRD). It was found that after PN + PECVD process, a TiN film with a thickness of 2 μm was formed on the surface of Ti6Al4V. The surface texture of Ti6Al4V-T sample was regular, but the PN + PECVD-T sample texture was wide and shallow irregular after nanosecond laser ablation. The Ti–O and Ti–N–O non-stoichiometric compounds appeared on the samples after nanosecond laser ablation. Through the wear and electrochemical corrosion test in SBF, it was found that PN + PECVD sample had the best wear resistance and corrosion resistance. The wear resistance and corrosion resistance of Ti6Al4V-T and PN + PECVD-T samples were much better than that of Ti6Al4V substrate. The results show that, nitrogen oxides formed on the surface had higher microhardness and surface density, which was beneficial to improve the wear resistance and corrosion resistance of implants.

钛合金作为一种广泛使用的骨科植入物，将面临人体体液的腐蚀。此外，植入物和人体骨骼的磨损也会降低植入物的使用寿命。为提高生物钛合金的耐磨性和耐腐蚀性能，先对Ti6Al4V合金进行等离子渗氮和等离子增强化学气相沉积（PN+PECVD）复合工艺改性，然后用纳秒激光烧蚀样品，形成规则的表面织构。织构的 Ti6Al4V 和 PN + PECVD 样品标记为 Ti6Al4V-T 和 PN + PECVD-T 样品。通过扫描电子显微镜(SEM)、能谱仪(EDS)和X射线衍射仪(XRD)观察改性前后样品的微观结构和相组成。发现经过PN+PECVD工艺后，μ形成的Ti6Al4V表面米。Ti6Al4V-T样品表面织构规则，但PN+PECVD-T样品经纳秒激光烧蚀后织构宽而浅不规则。Ti-O 和 Ti-N-O 非化学计量化合物在纳秒激光烧蚀后出现在样品上。通过SBF中的磨损和电化学腐蚀试验，发现PN+PECVD样品具有最好的耐磨性和耐腐蚀性。Ti6Al4V-T 和 PN+PECVD-T 样品的耐磨性和耐腐蚀性能明显优于 Ti6Al4V 基体。结果表明，表面形成的氮氧化物具有较高的显微硬度和表面密度，有利于提高种植体的耐磨性和耐腐蚀性。