Abstract
This study compares the tribological, thermal and mechanical properties of epoxy-based composites with solid fillers (ultrahigh molecular weight polyethylene, molybdenum disulphide), and different in situ liquid lubricants in different volume proportions. Liquid lubricants used in this paper are three types of silicon oil with different viscosities, base oil and polyalphaolefins (PAO). The base oil-epoxy composite showed superior tribological performance among the three. The coefficient of friction of 0.1 and specific wear rate in the range of 10−7 mm3/Nm were obtained at an apparent pressure of 0.611 MPa. Transfer film formation with oil pockets on both the tribo-pair surfaces was identified as the main friction and wear reduction mechanisms. The surface of epoxy became hydrophobic, reducing adhesive interaction and friction.
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