An investigation of the friction and wear behaviors of ceramic particle filled polyphenylene sulfide composites

摘要

The composites of polyphenylene sulfide (PPS) filled with 1-3μm size ceramic particles ofA1{sub}2O{sub}3, SiC, Si{sub}3N{sub}4, and Cr{sub}3C{sub}2 were prepared by compressionmolding. The hardness and the friction and wear behaviors of these composites were studied. For thelatter a pin-on-disc friction and wear tester was used and sliding was performed between 5 mm× 6mm pins and AISI 02 tool steel counterface at a speed of 1.0 m s{sub}-1 and a normal load of 19.6 N.The worn composite pin surfaces and the transfer films formed on the counterface were examined byscanning electron microscopy. An X-ray photoelectron spectrometer (XPS) was used tocharacterize the chemical states of the elements in the transfer film for the possible tribochemicalchanges which occurred during sliding. It was found that SiC, Si{sub}3N{sub}4, andCr{sub}3C{sub}2 as the fillers increased the wear resistance of PPS considerably whileA1{sub}2O{sub}3 decreased it. The fillers promoted the decomposition of PPS and generatedcompounds which accounted for the changes in wear resistance of the composite. The fillers alsocaused abrasion and thereby disrupted the transfer film in some cases. XPS and SEM observationshave been used to develop understanding for the changes in wear resistance of the composites withthe use of fillers.