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A platform for research: civil engineering, architecture and urbanism
The invention relates to a preparation method of a high-strength light carbon fiber composite material. The preparation method comprises the following steps: 1, applying a sizing agent to the surfaces of continuous filament carbon fibers, and then winding the preprocessed continuous filament carbon fibers to form a highly oriented preformed blank of a cone-shaped C/C composite material; (2) immersing the preformed blank obtained in the step 1 in vacuum; (3) performing pressure carbonization on prepreg obtained in the step (2) under the protection of nitrogen, soaking into an impregnant solution to fill in the voids, and then performing CVD; (4) graphitizing a product obtained in the step (3), immersing and then performing the CVD; and (5) activating the compact C/C composite product obtained in the step (4) by use of water vapor to obtain a high-strength light C/C composite material. The high-strength light C/C composite material has the tensile strength of 800MPa or above, the thermal conductivity is 500-530W/(m.K) and the thermal diffusivity is 4.4cm2/s.
The invention relates to a preparation method of a high-strength light carbon fiber composite material. The preparation method comprises the following steps: 1, applying a sizing agent to the surfaces of continuous filament carbon fibers, and then winding the preprocessed continuous filament carbon fibers to form a highly oriented preformed blank of a cone-shaped C/C composite material; (2) immersing the preformed blank obtained in the step 1 in vacuum; (3) performing pressure carbonization on prepreg obtained in the step (2) under the protection of nitrogen, soaking into an impregnant solution to fill in the voids, and then performing CVD; (4) graphitizing a product obtained in the step (3), immersing and then performing the CVD; and (5) activating the compact C/C composite product obtained in the step (4) by use of water vapor to obtain a high-strength light C/C composite material. The high-strength light C/C composite material has the tensile strength of 800MPa or above, the thermal conductivity is 500-530W/(m.K) and the thermal diffusivity is 4.4cm2/s.
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