PTFE填充泡沫铝/聚甲醛复合材料力学与摩擦学性能的研究  

Mechanical and tribological properties of polytetrafluoroethylene filled aluminum foam/polyoxymethylene interpenetrating phase composites

作　　者：龚建彬[1] 粟洋 刘爱学[1] 杨海洋[1] 

机构地区：[1]株洲时代新材料科技股份有限公司,湖南株洲410004 [2]北汽(广州)汽车有限公司,广东广州510000

出　　处：《电力机车与城轨车辆》2015年第A01期78-81,共4页Electric Locomotives & Mass Transit Vehicles

摘　　要：采用注塑成型的方式,将聚甲醛(POM)注入开孔泡沫铝(AF)中,形成一种互穿结构的复合材料(IPC)。该复合材料与纯泡沫铝和聚甲醛相比,其弯曲强度和冲击强度都有很大改善。在泡沫铝/聚甲醛复合材料中加入10%PTFE,能有效改善材料机械性能。对复合材料(IPC)进行的销-盘式摩擦试验表明,AF/POM/PTFE材料的摩擦系数比AF/POM低约12.7%,磨损量减少33.3%。对材料的磨损表面进行的SEM和EDS分析表明,复合材料耐磨性的增加与摩擦过程中形成的转移膜有关。A new type of interpenetrating phase composites （IPC） is prepared by impregnating open-cell aluminum foam （AF） with polyoxymethylene （POM） through an injection molding process. The IPC shows relatively high bending strength and impact strength when compared to pure AF and POM. With the addition of 10wt.% polytetrafluoroethylene （PTFE）,the mechanical properties are improved. Tribological tests of IPC are carried out with a pin-disk machine. The friction coefficient of AF/POM/PTFE IPC is about 12.7% lower than that of AF/POM IPC and the abrasion loss reduces by 33.3%. The worn surfaces are characterized by scanning electron microscope （SEM） and energy dispersive X-ray spectroscopy （EDS） to explore the wear mechanism. The reason of the increase in the wear resistance can be explained by the transfer film which delays the wear process.

关 键 词：IPC 摩擦学性能 机械性能 泡沫铝 聚甲醛 PTFE 

分 类 号：U260.67[机械工程—车辆工程]