摘要
以注塑成型法制备了聚四氟乙烯(PTFE)和MoS2填充PA1010复合材料,采用M-2000磨损试验机考察了复合材料与45钢对摩时的摩擦磨损性能,并利用扫描电子显微镜(SEM)分析了PA复合材料磨损表面及其偶件表面转移膜形貌。研究结果表明:PTFE填充PA1010可显著改善尼龙复合材料的摩擦磨损性能。PTFE质量分数为25%时,复合材料的摩擦学综合性能最佳。PTFE和MoS2共同填充PA1010时,复合材料的摩擦因数和磨损率随着PTFE含量的减少、MoS2含量的增加,整体呈现增大趋势,其中PA+20%PTFE+5%MoS2复合材料的减摩抗磨性能较好。在正常工作条件下(0.21-0.42 m/s,100-300 N),PA+25%PTFE复合材料的抗磨性优于相同条件下PA+20%PTFE+5%MoS2复合材料,但PA+20%PTFE+5%MoS2复合材料具有更宽的速度适用范围。PA复合材料的摩擦磨损性能与其在偶件表面形成的转移膜的特性有重要关系,转移膜的厚度大小、分布均匀状况以及和偶件的结合强度都会对复合材料的减摩抗磨性能产生影响。
All specimens of polytetrafluoroethylene（PTFE） and MoS2 filled polyamide 1010（PA1010） composites were prepared by a micro injection machine.The friction coefficient and wear rate of the composites sliding against carbon steel were investigated with the M-2000 ring-block wear tester.The worn surfaces of the composites and transfer films on the counterparts were observed by using a scanning electron microscope.The results show that PTFE can considerably improve the tribological properties of PA1010 composites.Especially,the PA＋25wt.%PTFE exhibits the best tribological properties.For the PTFE and MoS2 filled composites together,both friction coefficient and wear rate of composites increase with the decreasing content of PTFE and increasing of MoS2,and PA＋20wt.%PTFE＋5wt.%MoS2 shows the best properties of friction-reducing and wear-resistance.Under the same working condition（0.21～0.42 m/s,100～300 N）,the wear-resistance of PA＋25wt.%PTFE is better than that of PA＋20wt.%PTFE＋5wt.%MoS2.However the PA＋20wt.%PTFE＋5wt.%MoS2 can be used under higher sliding speed.The friction and wear behaviors of PA composites are closely related to the characteristics including thickness,distribution and the combined intensity of the transfer film formed on the counterparts.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2010年第1期17-21,共5页
Journal of Wuhan University of Technology
基金
国家自然科学基金(50875253)
高等学校博士学科点专项科研基金(20060290505)
教育部科学技术研究重点项目(107054)
