硅灰石形貌和尺寸因素对PTFE复合材料摩擦学性能的影响  

Effects of Filler's Size and Shape on the Tribological Properties of PTFE Composites

作　　者：孙庆杰[1] 冯新[1] 汪怀远[1] 史以俊[1] 陆小华[1] 

机构地区：[1]南京工业大学材料化学工程重点实验室,江苏南京210009

出　　处：《高分子材料科学与工程》2009年第5期56-59,共4页Polymer Materials Science & Engineering

基　　金：国家高技术研究发展计划(863计划:2003AA333010);国家自然科学基金资助项目(20246002)

摘　　要：利用同种材质的硅灰石填料有着不同的形貌(纤维状和粒状)和尺寸(d=10μm～60μm;l=50μm～600μm)的特征,考察了填料的形貌和尺寸因素对聚四氟乙烯(PTFE)复合材料磨损性能的影响,并探讨了其影响机理。研究发现,在低载荷下,对于同样尺寸的填料,粒状填料比纤维状填料填充的PTFE复合材料有着更好的耐磨性;而对于纤维状填料,小尺寸填料填充的PTFE复合材料有着更加优越的耐磨性能。在高载荷下,情况则完全相反,此时大尺寸及纤维状填料填充的PTFE复合材料的耐磨性能更加优越。Effects of filler＇s shape （fiber and particle） and size （d = 10μm--60 μm; l =50 μm--600 μm） on the tribological properties of wollastonites filled PTFE composites were studied. The results show that PTFE composites filled with particle-shaped filler have better wear resistance than the composites filled with the same size of fiber under lower load. Meanwhile, under the same condition, PTFE composites filled with smaller size of wollastonite fiber exhibit better wear resistance than the fiber filled composites with bigger size. However, the results are different absolutely when the tests are under higher load condition. PTFE composites filled with bigger size and fiber-shaped of wollastonite exhibit better wear resistance.

关 键 词：硅灰石 摩擦磨损 聚四氟乙烯复合材料 尺寸形貌 载荷 

分 类 号：O631.21[理学—高分子化学]