坡缕石/Ag复合纳米材料添加剂的自修复性能研究

摘要

将坡缕石(Palygorskite,简称P)/Ag复合纳米材料作为润滑油添加剂,以质量分数为4％的添加量添加到150N基础油中作为润滑油,在MMU-10G型摩擦磨损试验机上考察了P/Ag复合纳米材料添加剂对45#调质钢摩擦副的自修复效果.用称重法测定磨损量,用SEM和EDX对最终摩擦表面形貌和表面元素成分进行表征;并用金相显微镜进行逐阶段形貌分析.结果表明纳米P/Ag复合添加剂有效减小了材料的磨损量达37.5％;自修复膜的主要成分为Fe,Si,O,C,A1,Mg,Ag,证明了纳米材料添加剂直接参与了自修复膜的形成;自修复膜的形成主要发生于运行10h(18km)以后.%The influence of friction and wear performance with palygorskite (P) /Ag nano-composite lubricant additive on 45# steel-45# steel pair treated by quenching and tempering were investigated by MMU-10G friction wear testing machine in the condition that friction surfaces were lubricated by the 150N base oil contained P/Ag composite nanomaterials in the mass fraction of I%. Wear mass losses were estimated by weighing, and the topographies of worn surfaces were characterized by SEM and the main elements of the final surfaces were detected by EDX, moreover, using metallographic microscope observed the topography of auto-restoration film at different growth stages. The results show that the nano-P/Ag composite additive reduces the wear mass loss of the 45 # steel-45# steel pair as high as 37. 5%. The main elements of auto-restoration film contain Fe, Si,O,C, Al, Mg, Ag, which proves that the composite additive participates in the forming of auto-restoration film. The auto-restoration film mainly forms in the time after 10h(or after running for 18km).