Tribology Letters ( IF 3.2 ) Pub Date : 2020-11-04 , DOI: 10.1007/s11249-020-01364-z Morgan R. Jones , Andrew B. Kustas , Ping Lu , Michael Chandross , Nicolas Argibay
The macroscale friction and wear properties of the Zr44Cu10Ni10Ti11Be25 metallic glass were investigated as a function of environmental oxygen concentration and contact force. We found remarkably low and predictable friction when both oxidation and frictional heating (that can lead to thermomechanically-driven crystallization) were supressed. Conversely, oxidation and the formation of a mixed metal-oxide layer was shown to increase the friction coefficient while significantly reducing wear rates. Depending on conditions, the wear rates ranged from values comparable to highly wear-resistant materials like polymer and 2D solid lubricant nanocomposites to those that are found with soft, pure, high-wear metals. These results reveal that the competition between material removal and the deformation-induced mixing of oxide particles can dramatically reduce wear rates, suggesting opportunities for optimization of tribological performance.
中文翻译:
大块金属玻璃的环境摩擦学特性
Zr 44 Cu 10 Ni 10 Ti 11 Be 25的宏观摩擦磨损性能研究了金属玻璃与环境氧气浓度和接触力的关系。当同时抑制氧化和摩擦加热(可导致热机械驱动的结晶)时,我们发现摩擦极低且可预测。相反,氧化和混合金属氧化物层的形成显示出增加了摩擦系数,同时显着降低了磨损率。根据条件的不同,磨损率的范围可以与高耐磨材料(如聚合物和2D固体润滑剂纳米复合材料)相媲美的值,也可以与软,纯,高磨损金属所发现的值相媲美。这些结果表明,材料去除与变形引起的氧化物颗粒混合之间的竞争可以显着降低磨损率,