Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of high-strength graphene modified SiCf/SiC composite material
The invention discloses a preparation method of a high-strength graphene modified SiCf/SiC composite material, which comprises the following steps: arranging SiC fiber cloth in a chemical vapor deposition furnace, and growing a pyrolytic carbon interface with the thickness of 100-200nm on the surface of the SiC fiber cloth through chemical vapor infiltration; preparing a water-based graphene dispersion liquid; the preparation method comprises the following steps: carrying out vacuum impregnation on pyrolytic carbon interface-containing fiber cloth in a graphene dispersion liquid, introducing graphene to the surface of the pyrolytic carbon interface-containing fiber cloth, taking out the fiber cloth, drying, clamping with a mold by taking three layers as a group, and depositing a SiC matrix for 50 hours through a chemical vapor infiltration method to obtain a porous SiCf/SiC composite material; the preparation method comprises the following steps: introducing graphene into a porous SiCf/SiC composite material through an impregnation process, drying, depositing a SiC matrix for 50 hours, impregnating and introducing graphene into the obtained SiCf/SiC composite material again, drying, depositing the SiC matrix for 50 hours, and repeating the steps until the density of the composite material reaches about 2.70 g/cm < 3 >. Graphene is introduced as a tough phase of the ceramic-based composite material through a vacuum impregnation method, so that the performance of the ceramic-based composite material is improved.
本发明公开了一种高强度石墨烯改性SiCf/SiC复合材料的制备方法，包括以下步骤：通过SiC纤维布置于化学气相沉积炉中，通过化学气相渗透在SiC纤维布表面生长100‑200nm厚热解碳界面；水基石墨烯分散液配置；将含热解碳界面纤维布真空浸渍于石墨烯分散液中，在含热解碳界面纤维布表面引入石墨烯，取出该纤维布烘干后以3层为一组采用模具夹紧，通过化学气相渗透法沉积50h SiC基体得到多孔SiCf/SiC复合材料；通过浸渍工艺在多孔SiCf/SiC复合材料中引入石墨烯，烘干后沉积50h SiC基体，将所得SiCf/SiC复合材料再次浸渍引入石墨烯，烘干后沉积50h SiC基体，如此反复直至复合材料密度达约2.70g/cm3。本发明通过真空浸渍的方法引入石墨烯作为陶瓷基复合材料强韧相，进而提升陶瓷基复合材料的性能。
Preparation method of high-strength graphene modified SiCf/SiC composite material
The invention discloses a preparation method of a high-strength graphene modified SiCf/SiC composite material, which comprises the following steps: arranging SiC fiber cloth in a chemical vapor deposition furnace, and growing a pyrolytic carbon interface with the thickness of 100-200nm on the surface of the SiC fiber cloth through chemical vapor infiltration; preparing a water-based graphene dispersion liquid; the preparation method comprises the following steps: carrying out vacuum impregnation on pyrolytic carbon interface-containing fiber cloth in a graphene dispersion liquid, introducing graphene to the surface of the pyrolytic carbon interface-containing fiber cloth, taking out the fiber cloth, drying, clamping with a mold by taking three layers as a group, and depositing a SiC matrix for 50 hours through a chemical vapor infiltration method to obtain a porous SiCf/SiC composite material; the preparation method comprises the following steps: introducing graphene into a porous SiCf/SiC composite material through an impregnation process, drying, depositing a SiC matrix for 50 hours, impregnating and introducing graphene into the obtained SiCf/SiC composite material again, drying, depositing the SiC matrix for 50 hours, and repeating the steps until the density of the composite material reaches about 2.70 g/cm < 3 >. Graphene is introduced as a tough phase of the ceramic-based composite material through a vacuum impregnation method, so that the performance of the ceramic-based composite material is improved.
本发明公开了一种高强度石墨烯改性SiCf/SiC复合材料的制备方法，包括以下步骤：通过SiC纤维布置于化学气相沉积炉中，通过化学气相渗透在SiC纤维布表面生长100‑200nm厚热解碳界面；水基石墨烯分散液配置；将含热解碳界面纤维布真空浸渍于石墨烯分散液中，在含热解碳界面纤维布表面引入石墨烯，取出该纤维布烘干后以3层为一组采用模具夹紧，通过化学气相渗透法沉积50h SiC基体得到多孔SiCf/SiC复合材料；通过浸渍工艺在多孔SiCf/SiC复合材料中引入石墨烯，烘干后沉积50h SiC基体，将所得SiCf/SiC复合材料再次浸渍引入石墨烯，烘干后沉积50h SiC基体，如此反复直至复合材料密度达约2.70g/cm3。本发明通过真空浸渍的方法引入石墨烯作为陶瓷基复合材料强韧相，进而提升陶瓷基复合材料的性能。
Preparation method of high-strength graphene modified SiCf/SiC composite material
一种高强度石墨烯改性SiCf/SiC复合材料的制备方法
CHEN ZHAOKE (Autor:in)
17.01.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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