Carbon / carbon composite material are high temperature friction materials of excellent performance, as the brake materials have been successfully applied in aviation industry. But the friction and wear properties of carbon / carbon composite material strongly depends on the experimental conditions and preparation process.
Compared with other friction materials, carbon / carbon composite materials with low density, high temperature resistant, high strength, thermal shock resistance, corrosion resistance, good vibration resistance and suitable friction coefficient and friction performance, is a comprehensive performance excellent high temperature friction material.
Carbon / carbon composite material have become the preferred materials for aircraft brake discs. In France, for the civil aviation flying Airbus Company the machine brake system has been completely replaced by carbon / carbon plate steel plate; in the United States, many military aircraft have been using carbon / carbon brake disc, such as F-16, B-1 etc.
In addition to do the brake disc, carbon / carbon composite material can also be used as sliding bearing material and piston of internal combustion engine.Carbon / carbon composites as friction material will be used more widely.
Carbon / carbon composite material reinforced by carbon fiber and matrix for pyrolytic carbon, both of them are amorphous carbon.
The matrix type is one of the important factors affecting the friction and wear properties. In two different density of carbon / carbon composites, medium density of carbon / carbon composite has good friction performance, which has low coefficient of friction, the wear volume than low density and high density of carbon / carbon composite low one order of magnitude.
The carbon / carbon composite friction has a strong influence on Wear Properties of carbon fiber orientation. At low speeds, when the parallel fiber on friction surface, the wear rate is much lower than the fiber perpendicular to the direction of the friction surface to and friction coefficient fiber perpendicular to the direction of the friction surface is much higher than; at high speed, friction coefficient and wear rate are not big difference. Z to the fiber content increases, can improve the carbon / carbon composite thermal conductivity rate, reduce the friction surface temperature will also affect the friction and wear properties of carbon / Carbon Composites