【作者】 史佩京； 于鹤龙； 许一； 徐滨士；

【Author】 Peijing SHI;Helong YU;Yi XU;Binshi XU;National Key Laboratory for Remanufacturing,Academy of Armored Forces Engineering;

【机构】 装甲兵工程学院装备再制造技术国防科技重点实验室；

【摘要】 在四球磨损试验机上研究了异辛酸稀土化合物(REI)和环烷酸稀土化合物(REN)作为液体石蜡(LP)添加剂的抗磨减摩性能,采用扫描电子显微镜(SEM)和能谱分析(EDS)对磨斑的表面形貌和表面膜的元素组成进行了分析,探讨了两种稀土化合物的摩擦化学作用机制。结果表明,不同添加浓度的REI和REN均可改善液体石蜡的抗磨、减摩性能,异辛酸稀土较环烷酸稀土具有更为优异的摩擦学性能,添加浓度为0.2%的REI可使液体石蜡的抗磨性能和减摩性能分别提高18%和25%。这是由于稀土化合物可以渗透到金属基体内部,形成含稀土的摩擦扩散层,通过提高表面硬度而增大耐磨性,同时可在摩擦副表面形成含La2O3、Ce2O3的化学反应膜,从而改善了摩擦磨损。更多还原

【Abstract】 The anti-wear and friction reduction performance of RE isocaprylate(REI) and RE naphthenate(REN) as liquid paraffin(LP) additive was examined on a fall-ball tribotester. The morphologies and elements distribution of the worn surfaces were characterized by means of SEM and EDS, the lubricating mechanism was also studied. The results show that REI and REN with different concentration both can improve the anti-wear and friction reduction performance of LP, furthermore, the former shows better tribological performance than the latter. Compared with LP, the anti-wear and friction reduction properties of REI additive are increased by 18% and 25%. The mechanism is inferred that the REI and REN additive experiences physical deposition/diffusion, chemical adsorption and chemical reaction on the worn surface, and forms a composite boundary lubrication film thereon containing La2O3, Ce2O3.更多还原