基于纳米氟化镧添加剂的润滑油摩擦学性能

发布时间：2018-03-02 17:13

本文选题：纳米氟化镧　切入点：表面活性剂　出处：《大连海事大学学报》2017年01期 　论文类型：期刊论文

【摘要】：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.
[Abstract]:In order to optimize the preparation method of nanometer lanthanum fluoride and to explore the tribological properties of nanometer lanthanum fluoride as lubricating oil additive, Lanthanum fluoride La F 3 particles were prepared by chemical precipitation method. Nanocrystalline lanthanum fluoride particles were obtained. The samples were characterized by nano-laser particle size analyzer and X-ray diffractometer. The nanometer lanthanum fluoride particles were added to the base oil with the addition of OS-15 (fatty alcohol polyoxyethylene ether) as surfactant. In order to evaluate the antiwear and antifriction properties of lanthanum fluoride nanoparticles in lubricating oil, the four-ball test was carried out on a universal friction and wear tester. The steel balls were observed under metallographic microscope and scanning electron microscope (SEM). The mechanism of antiwear and friction reduction is analyzed. The results show that the antiwear and antifriction effect of nanometer lanthanum fluoride lubricating oil is the best when the addition of nanometer lanthanum fluoride is 2.5, and the nanometer lanthanum fluoride lubricating oil is compared with the base oil. The friction coefficient decreased by 52.7 and the diameter of grinding spot decreased by 29.6.The wear spot of nanometer lanthanum fluoride lubricating oil was more regular than that of base oil, and the ploughing groove was shallower. The analysis showed that the nano-lanthanum fluoride lubricating oil filled the surface of friction pair in time during friction and wear. It is easy to combine with the substrate to form a chemical reaction film which effectively prevents the friction and wear between the metal substrates and plays a good role in antiwear and friction reduction.
【作者单位】：大连海事大学轮机工程学院;
【分类号】：TE624.82

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