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为优化纳米氟化镧的制备方法,探索纳米氟化镧作为润滑油添加剂的摩擦学性能,采用化学沉淀法制备氟化镧(La F3)粒子,使用全方位行星式球磨机球磨后,得到纳米级氟化镧粒子.采用纳米激光粒度仪和X射线衍射仪(XRD)对样品进行表征.使用平平加OS-15(脂肪醇聚氧乙烯醚)作为表面活性剂,把纳米氟化镧粒子添加到基础油中,采用万能摩擦磨损试验机做四球试验,以评价纳米氟化镧粒子在润滑油中的抗磨减摩特性.试验钢球在金相显微镜和扫描电子显微镜(SEM)下观察,分析其抗磨减摩机理.结果表明:当纳米氟化镧的添加量为2.5%时,抗磨减摩效果最佳;纳米氟化镧润滑油与基础油相比,摩擦系数减小了52.7%,磨斑直径减小了29.6%;纳米氟化镧润滑油的磨斑较基础油更规则,犁沟较浅.分析表明,纳米氟化镧在摩擦磨损过程中及时填充到摩擦副表面,易与基体结合生成化学反应膜,有效阻挡了金属基体之间的摩擦磨损,起到良好的抗磨减摩作用.
In order to optimize the preparation method of nanometer Lanthanum Fluoride, the tribological properties of Lanthanum Fluoride as lubricating additive were explored. Lanthanum fluoride (La F3) particles were prepared by chemical precipitation method and ball-milled with omnidirectional planetary ball mill to obtain nano- Samples of lanthanum fluoride particles were characterized by nano-laser particle size analyzer and X-ray diffractometer (XRD), using paclitaxel OS-15 (fatty alcohol polyoxyethylene ether) as a surfactant and adding nano-lanthanum fluoride particles In the base oil, a universal friction and wear tester was used to make a four-ball test to evaluate the anti-friction and antifriction properties of the nano-particles of lanthanum fluoride in lubricating oil.The steel balls were observed and analyzed by metallographic microscope and scanning electron microscope (SEM) The anti-wear and anti-friction mechanism was studied.The results show that anti-friction and anti-friction effect are best when the content of lanthanum-lanthanum is 2.5%, and the friction coefficient is reduced by 52.7% , And the diameter of the wear spot reduced by 29.6%. The wear spot of lanthanum fluoride lanthanum was more regular than that of base oil, and the furrow was shallow. The analysis showed that nano lanthanum fluoride filled the surface of friction pair in time Combined with the substrate to generate chemical reaction membrane, there Blocking the friction between the metal substrate to wear, antiwear play a good role.