A study of the modification of the friction and wear behavior of polyphenylene sulfide by particulate Ag2S and PbTe fillers

Abstract The tribological behavior of polyphenylene sulfide (PPS) reinforced with particulate inorganic fillers was studied. The composites were molded with Ag2S and PbTe fillers in varying proportions. Sliding tests were performed in a pin-on-disk configuration at a speed of 1.0 m/s, nominal pressure of 0.65 MPa, and counterface roughness of 0.1 μm Ra. The counterface was a hardened tool steel disk. Microscopic analysis of the transfer films formed on the counterface during sliding was performed. X-ray photoelectron spectroscopy (XPS) was used to analyze the compositions in the transfer film in the vicinity of the counterface. The As2S filler decreased the wear rate of PPS significantly while PbTe increased it considerably. The microscopic examination of the counterface surface showed that a thin, uniform and strongly adhering polymer transfer film was formed when Ag2S was used as the filler but there was little transfer film formed in the case of PbTe filler. XPS analysis revealed that chemical reaction occurred during sliding between the filler and the counterface Fe in the case of Ag2S while there was no such chemical reaction when PbTe was used as the filler. The chemical reaction in the case of Ag2S filler contributed to enhanced adhesion between the transfer film and the counterface and thus led to reduced wear.

[1]  W. Stickle,et al.  Handbook of X-Ray Photoelectron Spectroscopy , 1992 .

[2]  Herbert Herman,et al.  Treatise on Materials Science and Technology , 1979 .

[3]  S. Bahadur,et al.  Transfer film bonding and wear studies on CuS-nylon composite sliding against steel , 1994 .

[4]  S. Bahadur,et al.  The transfer and wear of nylon and CuS-nylon composites: Filler proportion and counterface characteristics , 1993 .

[5]  S. Bahadur,et al.  The growth and bonding of transfer film and the role of CuS and PTFE in the tribological behavior of PEEK , 1995 .

[6]  D. Tabor,et al.  The friction and wear of high density polythene: The action of lead oxide and copper oxide fillers , 1974 .

[7]  Guoren He,et al.  Friction and wear of poly(phenylene sulphide) and its carbon fibre composites: I unlubricated , 1987 .

[8]  Q. Xue,et al.  The effect of particle size of nanometer ZrO2 on the tribological behaviour of PEEK , 1996 .

[9]  S. Bahadur,et al.  The investigation of the action of fillers by XPS studies of the transfer films of PEEK and its composites containing CuS and CuF2 , 1993 .

[10]  D. Tabor,et al.  The wear of filled polytetrafluoroethylene , 1984 .

[11]  Gong Deli,et al.  Investigation of adhesion wear of filled polytetrafluoroethylene by ESCA, AES and XRD , 1990 .

[12]  Shyam Bahadur,et al.  The role of copper compounds as fillers in transfer film formation and wear of nylon , 1992 .

[13]  Klaus Friedrich,et al.  On sliding friction and wear of PEEK and its composites , 1995 .

[14]  A. I. Sviridyonok,et al.  A study of transfer in frictional interaction of polymers , 1973 .

[15]  S. Bahadur,et al.  The effect of ZnF2, ZnS and PbS fillers on the tribological behavior of nylon 11 , 1992 .

[16]  S. Bahadur,et al.  Tribochemical studies by XPS analysis of transfer films of Nylon 11 and its composites containing copper compounds , 1993 .

[17]  The Wear of Polymers , 1979 .

[18]  R. Janssen,et al.  Wear and friction of aramid fiber and polytetrafluoroethylene filled composites , 1997 .

[19]  Wei-min Liu,et al.  An investigation of the friction and wear properties of nanometer Si3N4 filled PEEK , 1996 .

[20]  S. Bahadur,et al.  The role of copper compounds as fillers in the transfer and wear behavior of polyetheretherketone , 1992 .

[21]  C. Speerschneider,et al.  The role of filler geometrical shape in wear and friction of filled PTFE , 1962 .