Abstract

To improve the tribological performance of titanium alloy, the novel nanocomposites titanium dioxide/black phosphorus nanosheets were successfully prepared by a sol-gel method. The effects of the concentration of the black phosphorus nanocomposites, the ratio of TiO₂ to black phosphorus, and the load and sliding velocity on the friction and wear of the titanium alloy friction pair under boundary lubrication conditions were investigated using a ball-on-disc tribometer with an orthogonal experimental design. Based on the results of the analysis of variance, the degree of influence of each factor on the friction and wear was obtained. The results show that these factors have different effects on the tribological behavior of Si₃N₄-Ti6Al4V(TC4) tribopairs. Load has the greatest influence on the friction and wear of the titanium alloy. When the antiwear performance of the upper Si₃N₄ ball was chosen as the response index, the optimum tribological conditions were obtained: load, 5 N; sliding velocity, 33 mm/s; mass ratio of TiO₂ to black phosphorus nanosheets, 2:1; and additive concentration, 0.01%. The excellent tribological performance could be ascribed to the formation of a tribolayer containing nanocomposites, which played the role of buffering and isolating the Si₃N₄-TC4 tribopairs.

摘要

为提高钛合金的摩擦学性能，采用溶胶-凝胶法成功制备了新型纳米二氧化钛/黑磷纳米片。研究了黑磷纳米复合材料的浓度、TiO ₂与黑磷的比例、载荷和滑动速度对边界润滑条件下钛合金摩擦副摩擦磨损的影响。具有正交实验设计的摩擦磨损计。根据方差分析的结果，得出各因素对摩擦磨损的影响程度。_{结果表明，这些因素对Si 3} N ₄的摩擦学行为有不同的影响。-Ti6Al4V(TC4) 摩擦对。载荷对钛合金的摩擦磨损影响最大。When the antiwear performance of the upper Si ₃ N ₄ ball was chosen as the response index, the optimum tribological conditions were obtained: load, 5 N; 滑动速度，33 mm/s；_{TiO 2}与黑磷纳米片的质量比，2:1；和添加剂浓度，0.01%。优异的摩擦学性能可归因于形成含有纳米复合材料的摩擦层，起到缓冲和隔离Si ₃ N ₄ -TC4摩擦对的作用。