几种微粒经纳米化后的润滑性变化  

Study on the Lubrication Properties of Several Nano-particles

作　　者：陶德华[1] 张玉伟[1] 付尚发[1] 

机构地区：[1]上海大学机械工程与自动化学院润滑研究室,上海200072

出　　处：《润滑与密封》2007年第8期95-98,110,共5页Lubrication Engineering

摘　　要：将微米级石墨、铜Cu、铝Al、锡Sn加于000#脂中进行超细纳米化加工制成纳米润滑脂。用四球机分别考察了制备的纳米润滑脂和其它微米级固体润滑剂(PTFE、MoS2、SiO2)以及含常用化学反应型抗磨极压剂(MoDTC、ZDTP和硫化异丁烯)的脂的摩擦性能。结果表明,经纳米化后Cu、Al、Sn和石墨的减摩效果和抗磨性比含微米级的相应脂都有了很大提高。承载能力试验表明只有纳米Sn承载能力比研磨前明显提高,因此纳米Sn显现最好综合摩擦特性,其减摩性、抗磨性、承载能力稍逊于化学反应型MoDTC。电镜TEM分析表明,含微粒润滑剂的摩擦特性同粒子材料的硬度、熔点有关,其中Sn较软,熔点低(232℃),延展性好,所以润滑性最好。Auger能谱分析表明,纳米粒子的润滑作用是由于它们在摩擦面上形成了物理沉积层。The greases containing nano-grade graphite, copper, aluminium and stannum were produced by fining the corresponding micron particles. The diameters of these particles were 40 - 100,15 - 50,20 - 40 and 20 - 50 nm respectively. The four-ball tester was used to evaluate the tribological properties of the greases containing nano-particles, micron particles and other anti-wear EP agents. The results indicate that the anti-friction and anti-wear properties of the particles were promoted markedly after fined to nano-grade. Only the grease containing nano-grade stannum promotes the loadcarrying capacities compared to micron grade, it shows excellent tribological properties, which is worse slightly than those of MoDTC. The TEM results show that the lubrication actions are related to their own physical characteristics, such as the hardness, melting points, nano stannum has lower hardness, lower melting point and better ductibility, so it makes markedly lubrication. The analysis results of AES indicate that the lubrication of the nano-partieles were due to the physical deposit layer on the rubbing surface.

关 键 词：纳米材料 摩擦学特性 润滑添加剂 

分 类 号：TQ028.53[化学工程]