通过对TC11钛合金进行不同表面改性实验(微弧氧化、N+离子注入、DLC多层膜),得到不同表面改性膜层。利用扫描电子显微镜(SEM),X射线衍射(XRD)和Raman光谱研究表面改性层的相组成和微结构。在模拟海水环境下,采用SRV-IV微动磨损试验机评价TC11合金及不同表面改性膜层的微动磨损性能(摩擦系数、磨损量及磨损机制),并比较抗微动防护效果。结果表明,TC11经改性后摩擦系数呈现不同程度下降,磨损量的降低则非常明显,其中DLC多层膜抗微动防护效果最显著。海水介质中各摩擦系数显著比纯水中低。海水中钛合金的磨损量小于纯水中的数值,腐蚀与磨损呈"负交互作用"规律,而改性层磨损较纯水中略高。

Different surface modification experiments were performed on titanium alloy TC11 to obtain MAO coating, N+ ion implanted layer and DLC multilayer film. Phase composition and microstructure were examined using scanning electron microscopy (SEM), X-ray diffraction (XRD) and Raman spectroscopy. Fretting wear performances of TC11 and different surface modification layers in simulated seawater environment were studied on the SRV-IV fretting wear machine. And effects of modification on the friction coefficient, wear resistance and abrasion mechanism were investigated. Results show that with the application of all above surface modifications, the fretting wear resistances of TC11 are improved. It is indicated that modified layers could cause the decrease of friction coefficient and wear volume compared with TC11. The reductions of wear volume are obvious, and the defending effect of DLC multilayer film is most outstanding. In the meantime, the friction coefficient in seawater is significantly lower than that in pure water. The wear volume reduction of TC11 in seawater compared with in pure water suggests that there's a negative interaction for TC11 between corrosion and wear. However, wear volumes of modified layers are slightly higher than the values in pure water.