• 专利标题:   Preparing high-strength graphene-modified SiCf/silicon carbide composite material, comprises e.g. arranging silicon carbide fibers in chemical vapor deposition furnace, growing thick pyrolytic carbon interface on surface by chemical vapor infiltration, vacuum impregnating and depositing SiC matrix.
  • 专利号:   CN115611648-A
  • 发明人:   CHEN Z
  • 专利权人:   UNIV CENT SOUTH
  • 国际专利分类:   C04B035/565, C04B035/628, C04B035/80, C04B035/84
  • 专利详细信息:   CN115611648-A 17 Jan 2023 C04B-035/80 202312 Chinese
  • 申请详细信息:   CN115611648-A CN10876795 25 Jul 2022
  • 优先权号:   CN10876795

▎ 摘  要

NOVELTY - Preparing a high-strength graphene-modified SiCf/silicon carbide composite material, comprises (1) arranging the silicon carbide (SiC) fibers in a chemical vapor deposition furnace, growing a 100-200 nm thick pyrolytic carbon interface on the surface of the SiC fiber cloth by chemical vapor infiltration, (2) dispersing graphene with anionic surfactant ultrasonically for 2 hours to obtain a graphene dispersion, (3) vacuum impregnating the pyrolytic carbon-containing interfacial fiber cloth in the graphene dispersion liquid, introducing graphene on the surface of the pyrolytic carbon-containing interfacial fiber cloth, and drying, taking 3 layers as a group and clamping with a mold, and depositing a SiC matrix for 50 hours by chemical vapor infiltration to obtain a porous SiCf/SiC composite material, and (4) introducing graphene into the porous SiCf/SiC composite material by impregnation process, and repeating until the density of the composite material reached 2.70 g/cm3. USE - The method is useful for preparing high-strength graphene-modified SiCf/silicon carbide composite material. ADVANTAGE - The method enables to prepare high strength graphene SiCf/SiC composite material that improves the performance of the ceramic-based composite material. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic flow chart of method for preparing high-strength graphene-modified SiCf/silicon carbide composite material (Drawing includes non-English language text).