A simple way to prepare silicon carbide reinforced graphite composite lubricating materials

Abstract

SiC reinforced graphite composites were prepared via introducing carbide silicon into the natural graphite flakes (NGF) by hot-pressing process. Their physical and mechanical properties, including density, open porosity, flexural strength, and friction behavior were investigated. The addition of 30vol% SiC increased the bending strength of composites materials to 127 MPa, 2 times higher than 60 MPa of commercial pure graphite block. What was particularly interesting was that the as-obtained graphite composite with 30vol% SiC kept the same low friction coefficient of about 0.1 as pure graphite, and the wear resistance of composites increased.

Keywords

lubricating materials / silicon carbide / mechanical property / tribological property

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