硅铝型天然陶瓷矿物添加剂对柴油机油润滑性能的影响  

Effect of Si/Al natural ceramic mineral additive on tribological properties of diesel engine oil

作　　者：于鹤龙[1] 杨红军[2] 钱耀川 赵春峰 徐滨士[1] Yu, He-Long[1]; Yang, Hong-Jun[2]; Qian, Yao-Chuan[3]; Zhao, Chun-Feng[4]; Xu, Bin-Shi[1]

机构地区：[1]装甲兵工程学院再制造技术重点实验室 [2]76327部队 [3]驻5137厂军代室 [4]装甲兵学院训练部

出　　处：《粉末冶金材料科学与工程》2012年第6期724-728,共5页Materials Science and Engineering of Powder Metallurgy

基　　金：国家重点基础研究发展规划(973计划)资助项目(2011CB013405);国家自然科学基金资助项目(51005243;50904072)

摘　　要：采用端面式摩擦磨损试验机考察平均粒径约为1μm的羟基硅酸铝(Al2[Si2O5](OH)4)天然矿物微粉作为重载车辆柴油机油添加剂的摩擦学性能,利用SEM、EDS和纳米压痕仪对摩擦表面进行形貌、元素和微观力学性能分析。结果表明,硅酸铝矿物微粉作为柴油机油(50CC润滑油)添加剂具有优异的摩擦学性能,可显著提升50CC润滑油的抗磨减摩性能,且在0.75%(质量分数)的添加量下表现出最佳的摩擦学性能。硅酸铝矿物可在摩擦表面形成一层富含Si、Al、O等元素的摩擦表面膜,该膜层的平均硬度达到7.05 GPa,较基础油润滑摩擦表面平均硬度高69.8%,而平均弹性模量(E)达237.4 GPa,与基体金属相当。Tribological properties of aluminum silicate （Al4[Si4O10]（OH）8） mineral micro-powders, with an average size of 1μm, as diesel engine oil （50CC lubricating oil） additive were evaluated on an end-face friction and wear tester. The morphologies, element distributions and micro mechanical properties of the worn surface were investigated by means of scanning electron microscopy （SEM）, energy dispersive spectrometry （EDS） and nano-indentation tester, respectively. Results indicate that friction reduction and wear resistance properties of 50CC oil improve effectively by adding natural mineral micro-powder. The minimal value of the coefficient and wear rate can be obtained when the micro-powders concentration is 0.75%（mass fraction）. It can be inferred that a protective film composed of Si, A1 and O forms on the worn surface. The film exhibits an average hardness （H） of 7.05 GPa, which is 69.8% higher than that of worn surface lubricated with base oil. Whereas its average modulus （E） is about 237.4 GPa, as is still with steel substrate level.

关 键 词：硅酸盐 矿物微粉 添加剂 摩擦学性能 纳米硬度 

分 类 号：TH117[机械工程—机械设计及理论]