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 coeffi cient of about 0.1 as pure graphite, and the wear resistance of composites increased.

SiC skeleton‐reinforced highly oriented graphite with good thermophysical and electromagnetic shielding properties

“…The thermal expansion of graphite perpendicular to the basal plane can be reduced when it endures tensile stress 10 . The introduction of other materials with lower CTE into the highly oriented graphite matrix, such as AlN, 11 SiC, 12 Cu, 13 and Al, 14 can place graphite under tensile stress in the through‐plane direction, and the CTE of the designed composites is then reduced in this direction. In these reinforcements, SiC is prominent because it not only exhibits low density, high TC, and low CTE, but it also possesses excellent dielectric loss properties.…”