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采用液相沉淀法制备了N,N-二辛基二硫代氨基甲酸修饰的Cd S纳米粒子,利用FTIR、XRD和SEM对其形貌与结构进行了表征,并利用MHK-500A环-块摩擦磨损试验机研究了Cd S纳米粒子含量和不同润滑条件对聚四氟乙烯基粘结固体润滑涂层摩擦学性能的影响.结果表明:所合成的Cd S纳米粒子大小均匀,粒径为20~30 nm;且Cd S纳米粒子能够改善涂层的摩擦学性能,当Cd S纳米粒子的添加质量分数为5%时,涂层的摩擦学性能最佳,摩擦系数和耐磨寿命分别为0.256和490 m/μm;与干摩擦相比,RP-3航空煤油润滑下涂层具有较低的摩擦系数和较长的耐磨寿命,且航空煤油有益于涂层承载能力的提高,使涂层在1 000 N的载荷下仍具有较好的摩擦学性能.
The CdS nanoparticles modified by N, N-dioctyldithiocarbamic acid were prepared by liquid-phase precipitation. The morphology and structure of CdS nanoparticles were characterized by FTIR, XRD and SEM. The friction and wear tester was used to study the effect of CdS nanoparticle content and tribological conditions on the tribological properties of polytetrafluoroethylene-based bonded solid lubricated coatings. The results show that the size of CdS nanoparticles is 20 ~ 30 nm. And CdS nanoparticles can improve the tribological properties of the coating. When the additive mass fraction of CdS nanoparticles is 5%, the tribological properties of the coating are the best, the friction coefficient and wear life are 0.256 And 490 m / μm. Compared with dry friction, RP-3 aviation kerosene lubricated undercoating has lower friction coefficient and longer wear life, and aviation kerosene is beneficial to the increase of coating bearing capacity, At 1 000 N load still has good tribological properties.