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以异丙醇或异辛醇、五硫化二磷、稀土氯化物为原料 ,合成了四种油溶性二烷基二硫代磷酸稀土盐 .以红外光谱和化学分析确定了所合成稀土盐的结构和化学组成 .在四球实验机上研究了几种稀土盐抗磨添加剂在不同加入量的情况下的最大无卡咬负荷及在不同负荷下抗磨损能力 ,并与二烷基二硫代磷酸锌的性能进行了比较 .结果表明 :本研究制备的油溶性二异丙基二硫代磷酸镧LaDDP - 3、二异丙基二硫代磷酸钕Nd DDP - 3和二异辛基二硫代磷酸镧LaDDP - 8、二异辛基二硫代磷酸钕NdDDP - 8具有比二烷基二硫代磷酸锌(ZnDDP)好的抗磨性能和减摩性能 .EDXA分析表明在实验条件下 ,稀土元素摩擦扩渗进入了材料的表面 ,这可能是此类稀土盐具有优秀的抗磨性能的主要原因
Four kinds of oil-soluble rare earth dialkyl dithiophosphate salts were synthesized from isopropanol, isooctanol, phosphorus pentasulfide and rare earth chloride.The structure and chemical composition of the synthesized rare earth salts were confirmed by IR and chemical analysis The maximum cardless bite load and wear resistance under different loadings of several rare earth salt antiwear additives were investigated on a four - ball test machine with the addition of zinc dialkyldithiophosphate The results show that LaDDP - 3, LaDDP - 3, Neodymium diisopropyldithiophosphate Nd DDP - 3 and lanthanum LaDDP - 8 , Neodymium diisooctyl dithiophosphate NdDDP - 8 has better wear resistance and antifriction property than zinc dialkyldithiophosphate (ZnDDP) .EDXA analysis shows that under the experimental conditions, rare earth elements infiltrate into The surface of the material, which may be the main reason for the excellent wear resistance of such rare earth salts