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| Study on the properties of wollastonite fiber -molybdenum disulfide filled polytetrafluoroethylene composites |
| XU En-en，FAN Hui-li，GUO Zhi-meng，Zhang Le-mei |
| Institute for Advanced Materials and Technology， University?of?Science?and?Technology?Beijing， Beijing 100083， China |
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Abstract Polytetrafluoroethylene (PTFE) composites filled with wollastonite fiber (WF) and molybdenum?disulfide (MoS2) were prepared through powder metallurgy. The influence of WF content on the tensile strength， hardness， friction and wear properties of the WF- MoS2/PTFE composites were investigated. The friction surface was observed by scanning electron microscope (SEM). The results show that the hardness increases， and the elongation at break reduces about 70% than pure PTFE by filling with the WF and MoS2. Tensile strength of the composite decreases gradually when mass percent of WF is more than 7%. The friction coefficient of the composite increases rapidly and the wear loss further decreases with addition of WF. The investigation of SEM indicates that WF on the friction surface gives priority to the load， the friction between PTFE matrix and dual surface is reduced， thus the wear loss is decreased. MoS2 particles are easy to wear， and its fragment has lubrication effect. PTFE filling with 18% MoS2 and 7% WF (mass percent) has a relative lower friction coefficient and wear loss.
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Received: 26 October 2015
Published: 01 February 2016
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2016, Vol. 26 
