PTFE复合材料的摩擦学性能及力学性能

利用MM-200型磨损试验机,对不同填料填充PTFE复合材料的摩擦磨损性能进行了研究,并探讨了淬火处理对PTFE复合材料摩擦学性能及力学性能的影响.研究发现,几乎所有填料均可大大降低PTFE复合材料的磨损,但其对PTFE复合材料性能的影响差别较大.聚苯脂填充PTFE复合材料虽然具有良好的摩擦磨损性能,但是其拉伸强度较小.PI增大了PTFE复合材料的摩擦系数,随着PI含量的增加,PTFE复合材料的拉伸强度增大,而其伸长率则减小.CdO填充PTFE复合材料虽具有良好的摩擦性能,但其伸长率较大.淬火处理使PTFE复合材料的结晶度下降,从而导致PTFE复合材料的硬度减小、耐磨性变差.

STUDY ON TRIBOLOGICAL AND MECHANICAL PROPERTIES OF PTFE COMPOSITES

The friction and wear properties of PTFE composites filled with different fillers were studied by using an MM-200 wear tester, then the effects of water quench treatment on the tribological and mechanical properties of the PTFE composites were investigated. Experimental results show that the wear of the PTFE composites can be greatly reduced by the fillers, but the effects of fillers on the properties of PTFE composites are different. The PTFE composites filled with Ekonol have excellent friction and wear properties, but its tensile strength is low. The filler of PI in PTFE increases the friction coefficients of the PTFE composites. With the increase of the content of PI in PTFE, the tensile strength of the PTFE composites increases, but its tension rate decreases. The PTFE composites filled with CdO have excellent friction properties, but its tension rate is high. Water quench treatment reduces the crystalline density of the PTFE composites, and this leads to the decrease of the hardness and anti-wear properties of the PTFE composites.