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采用微弧氧化法在纯钛材及大变形纯钛材表面制备了含钙、磷的多孔氧化膜层,研究膜层的微观形貌、硬度、膜基结合力、滚动摩擦磨损性能等性能,探讨钛基材组织细化对其膜层结构及力学性能的影响。结果表明:与纯钛材微弧氧化膜层相比,大变形纯钛材微弧氧化膜层表面微纳米尺度的孔洞更多,孔隙率更高(10.84%vs.9.68%),孔洞孔径更小(8.67μm vs.9.68μm),表面更平坦,锐钦矿相含量更高(43.13%vs.37.74%),膜-基结合能力更强(17 N vs.8N),摩擦系数较低(0.338 vs.0.358),耐磨性能更优,以上的膜层结构及力学性能的改善归因于其钛基材大变形化提高了晶体缺陷。
Micro-arc oxidation method was used to prepare the porous oxide film containing calcium and phosphorus on the surface of pure titanium and large deformed pure titanium. The microstructure, hardness, film-base bonding force and rolling friction and wear properties of the film were studied. The effect of microstructure of titanium substrate on its structure and mechanical properties was discussed. The results show that the surface of micro-arc oxidation film of the large deformed pure titanium has more pores and higher porosity (10.84% vs.9.68%) than the micro-arc oxidation coating of pure titanium. The hole diameter is more (8.67μm vs.9.68μm), the surface is flatter, the content of Ruiqin ore is higher (43.13% vs.37.74%), the membrane-based binding capacity is stronger (17 N vs.8N) and the friction coefficient is lower 0.338 vs.0.358). The wear resistance is better. The improvement of the structure and mechanical properties of the above films is attributed to the large deformation of the titanium substrate and the improvement of crystal defects.