Li Shuai, Cai Haopeng, Liu Haichao, Xu Zhuang, Lou Wenjing
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences Lanzhou 730000 China
School of Mechanical and Automotive Engineering, Qingdao University of Technology Qingdao 266520 China.
RSC Adv. 2025 Apr 14;15(15):11562-11572. doi: 10.1039/d5ra00838g. eCollection 2025 Apr 9.
Lubricating additives are essential for enhancing the tribological properties of grease. The development of low-cost lubricant additives with excellent biodegradability is expected to be the prevailing trend for future advancements. In this study, biodegradable ultrafine β-tricalcium phosphate (β-TCP) was utilized to enhance the friction reduction, anti-wear and extreme pressure properties of barium complex greases at high temperatures. At 150 °C and a load of 150 N, compared to the base grease, the average friction coefficient (AFC) of barium complex grease with 4.5% β-TCP was reduced by 21.82%. Meanwhile, the wear volume was reduced by 88.43%. Moreover, the extreme pressure properties of the barium complex grease were increased by 3.75 times. The lubrication mechanism of β-TCP is the formation of a protective film of P and Ca compounds on the surface of the friction partner.
润滑添加剂对于提高润滑脂的摩擦学性能至关重要。开发具有优异生物降解性的低成本润滑添加剂有望成为未来发展的主流趋势。在本研究中，可生物降解的超细β-磷酸三钙（β-TCP）被用于提高钡复合润滑脂在高温下的减摩、抗磨和极压性能。在150℃和150N载荷下，与基础润滑脂相比，含有4.5%β-TCP的钡复合润滑脂的平均摩擦系数（AFC）降低了21.82%。同时，磨损体积减少了88.43%。此外，钡复合润滑脂的极压性能提高了3.75倍。β-TCP的润滑机制是在摩擦副表面形成一层P和Ca化合物的保护膜。
