摘要
采用弱磁场辅助氧化共沉淀法制备不同形貌的纳米Fe3O4颗粒,并将改性后的颗粒分散添加到#40机油中进行金属摩擦副的磨损试验,采用扫描电子显微镜、X射线光电子能谱和Raman光谱观察和分析摩擦副钢的磨痕表面形貌和化学组成。结果表明:Fe3O4纳米颗粒被粘附在摩擦副钢表面,填补了摩擦表面的缺陷区域,对磨损表面起到一定的自修复作用,并且明显提高金属摩擦副的抗磨损性能。片状颗粒比八面体和无规则形貌颗粒,能够更好地在其摩擦面上形成一层或多层低剪切应力的固体保护层,使得减磨和自修复效果较好。
Nano-particles of magnetite（Fe3O4） with various morphologies,which were synthezed by a weakly magnetic field assisted oxidative co-precipitation method,were used as addictives in lubricant oils.The tribological tests with a designed steel pair system were carried out.The surface and chemical element states of the steel pair in the lubricant oils with and without the modified nano-particles were analyzed by scanning electron microscopy,X-ray photoelectron spectroscopy and Raman spectroscopy.The re-sults show that the modified nano-particles of Fe3O4 can adhere on the surface of steel pairs to form a self-repairing film that can im-prove the anti-wear properties of the steel pairs.Compared to the nano-particles with octahedral and irregular morphologies,the parti-cles with flaky shape as an additive in the lubricant oil could preferably form either a low shear stress mono-layer or a solid protective multi-layer,leading to the superior performance for wear reduction and self-repairing.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2011年第1期152-157,共6页
Journal of The Chinese Ceramic Society
基金
广东省自然科学基金(9151064101000017)
国家自然科学基金(51075152)资助项目
关键词
纳米四氧化三铁颗粒
润滑添加剂
抗磨
减摩
自修复
nano-particles of ferrite
lubricant additive
antifriction
tribology
self-repairing
