Rapid densification and properties of C/C brake discs

In order to decrease the manufacturing time and improve the properties of the C/C brake discs,a new process of rapid densification to manufacture C/C brake discs was developed.This process is a method of the isothermal pressure gradient CVI whose precursors are CH4 and C3H8.The CVI(chemical vapor infiltration) time of the discs manufactured by the new process is a half of the CVI time of the discs manufactured by the conventional process whose precursor is C3H6.In addition,the thermal conductivity of the discs produced by the new process has increased by more than 5%,the mechanical properties including tensile strength,compressing strength,bending strength and shearing strength have increased by more than 10%,and the properties of friction and wear have been raised by more than 20%.