Carbon carbon composite material for a series of unique mechanical, thermal and tribological system can replace the metal base composite material of a new generation of brake materials, its main characteristics are as follows:
Density is small, the density of the material at about 1.8 g/cm3, is 1/3 to 1/4 of metal matrix composites. Using the materials of brake components, compared to about 40% weight loss. For military aircraft, the aircraft can be improved measure of payload and lighter; For commercial aircraft, lose weight 1 kg equivalent to 3000 litres of fuel savings annually. So the cost of its use effect is remarkable.
Thermal stability is good, when to stop the plane take off, the surface temperature of the brake pads of more than 2000 ℃ above, carbon/carbon composites are neither melt adhesive, also won't buckling deformation, can continue to use after cooling; More than 660 ℃, the temperature of the metal matrix composites above will generate buckling deformation, lead to melt adhesive, need to repair the brake components. Therefore, made of carbon/carbon composites brake pads can not only improve the design margin of brake components, also improves the use safety of brake components. manufacturer: Beijing Greatwall Co.,Ltd..
The heat capacity of the heat capacity is big, the material is 2.5 times that of metal matrix composites have good heat function, improve the heat storage capacity of heat reservoir, reduce the operating temperature of the heat reservoir.
Stable friction coefficient, the material in a wide range of temperatures and stable friction coefficient, the plane soft braking process, improved the aircraft brake comfort.
Low wear rate, long service life. For at least 2 times of metal matrix composites, reduced the maintenance of the brake components.
Is higher than strength, especially the high temperature strength of steel more than 2 times , compared with the metal matrix composites, the material itself can be used as structural components, don't need other material skeleton support structure, simplify the structure of the brake components, improve the reliability and maintainability of the brake components.
Because of the material has the above characteristics, is especially suitable for used as aircraft brake materials, so since the 1990 s, carbon brake has become the standard configuration of new aircraft and a wide range of applications.