Conductive diamond/amorphous carbon composite material having high strength and process for preparing the same

A process for preparing the carbon composite material, comprising the steps of:

• (1) providing a block preform of glassy carbon;
• (2) loading the block preform of glassy carbon into a sintering mold, and then carrying out a first high temperature and high pressure sintering treatment;
• (3) after the first high temperature and high pressure sintering, cooling cavity of sintering equipment slowly to room temperature following by pressure relieve, taking out the sintered body, and then loading it into a sintering mold for a second high temperature and high pressure sintering, wherein cooling cavity of sintering equipment slowly to room temperature is a controlled stepwise cooling;
• (4) after the second high temperature and high pressure sintering, subjecting the sintered body to rapid cooling so as to cool the sintered body and cavity of sintering equipment quickly to room temperature, releasing pressure and taking out the sintered body for optional processing and post-processing,
• wherein the carbon composite material is composed of an amorphous carbon continuous phase and multiple separate diamond phases embedded in the amorphous carbon continuous phase, and wherein the diamond phases exhibit an ordered sp3 hybrid state, and the amorphous carbon continuous phase exhibits a disordered sp2 hybrid state.