炭素繊維を充填したPTFE複合材の引張りおよび摩耗特性

抄録

Fiber-reinforced PTFE (Polytetrafluoroetylene) composites have been widely used in sliding portion such as piston rings of compressors because of low friction, high heat and chemical resistances. However, the piston rings used under oil-less conditions tend to show relatively short lives. It is therefore important to improve their mechanical and wear properties further to extend the inspection period and the product life. In this paper, plates of carbon-fiber-filled PTFE composites were made using two types of PTFE (thin sheets and powder), and tensile and wear tests were performed. It was found from these tests that the longitudinal elastic modulus increased with the amount of carbon fibers. On the other hand, wear volume also increased with the amount of carbon fibers. Increase in carbon fiber content improves the rigidity of composite but deteriorates wear properties.