The invention discloses a carbon-carbon
composite material ring for hot pressed
sintering and a preparation method thereof. Firstly, high-strength carbon
fiber yarn impregnated with phenolic resin is wound on the outer side of a steel mold core with the taper of 1-5 degrees, after winding is conducted by 2-10 mm, carbon
fiber cloth impregnated with phenolic resin is wound by 1-3 mm, the breadth of the carbon
fiber cloth is the same as the height of the mold, and the carbon fiber cloth and the carbon fiber
yarn are wound repeatedly and alternately. After winding to a preset thickness, the mold is heated and cured. The cured carbon fiber reinforced phenolic resin material ring is taken down from the steel mold and sleeves on an expanding and inner
diameter expanding mold, then is put into a hot-pressing
sintering furnace, slowly heated and carbonized to 600 DEG C or above in the presence of flowing
nitrogen, and slowly pressurized while slowly heated and carbonized, the
maximum pressure is increased to 25-35 Mpa and is kept until the
carbonization is finished; and after cooling, discharging from the furnace, the carbon-carbon
composite material ring is taken down, dipped in the phenolic resin again, and heated and cured after dipping so as to obtain the carbon-carbon
composite material ring for hot pressed
sintering.