纳米洋葱碳作为润滑油添加剂的摩擦性能研究

采用化学气相沉积法制备纳米洋葱碳(CNOs),外部为石墨层,内部包含Fe-Ni催化剂颗粒,形状类似于球形,在机械润滑中起到"微轴承"作用.运用旋转氧弹法、四球摩擦试验机和润滑油抗磨试验机考察其作为润滑油添加剂的摩擦性能.摩擦实验结果表明:纳米洋葱碳作为润滑油添加剂表现出很好的抗磨减磨性能,CNOs的质量分数为0.05;时,润滑油的抗磨性能明显提升,此时极压值提高64;,磨斑直径减小了78;,氧化安定性更好.

Friction Properties of Carbon Nano Onions as Lubricating Oil Additives

Carbon nano onions (CNOs) were prepared by chemical vapor deposition (CVD).The outer layer was graphite layer, which contained Fe-Ni catalyst particles, and the shape was similar to spherical and played the role of "micro-bearing" in mechanical lubrication.The friction performance of the lubricant additive was investigated by rotating oxygen bomb method, four-ball friction tester and lubricating oil anti-wear tester.The results show that carbon nano onions have good anti-wear performance.When the mass fraction of CNOs is 0.05%, the abrasion resistance of lubricating oil is improved obviously.At this time, the extreme pressure value is increased by 64%, the diameter of grinding spot is reduced by 78%, and the oxidation stability is better.