Method for preparing carbon-fiber reinforced silicon carbonate base composite by gas-phase siliconizing technology

This invention relates to preparation method gas phase siliconizing technique preparing high compact fiber reinforcement SiC group composite material. Protection layer interface is formed on fiber surface through gas phase or liquid phase, then they are dipped and cracked through nm SiC slime to make certain density precast body of fiber reinforcement SiC group. Carbon is added into the body through dipping and cracking way to form group body with certain pore, the group body penetrates inner part of the multi-hole body through gas phase silicon after it is high temperature treated, then it reacts with carbon and fills the pore to get compact basal body. The density of the material can reach 2.25-2.30g/cm3, open porosity is 3-6 percent; it is large more higher than traditional method of getting Cf/SiC material.