The Development of Wear Resistance Carbon/Carbon Composites and Their Brake Properties

On the basis of tests and exploration, the ordinary pressure gradient technology(PGT) was improved, deposition chamber and equipment of directional flow for deposited gas was designed, and the technological parameters were simultaneously adjusted, C/C composites were successfully prepared by improving pressure gradient technology (IPGT), in view of the question of long manufacturing cycle and miscellaneous technological process for chemical vapour deposition C/C composites. The producing period can be reduced as much as 60%, and intermediate machining and high temperature heat treatment step during common CVD methods are not necessary, so that the production cost is obviously dropped. The inertia dynamic test of whole dimension sample indicated that the products have not only better friction and wear properties, the stable variation of brake moment with velocity, small specific wear, but also are not delamined and fractured. The requirement of brake for aeroplane and so on can be fully satisfied.