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Preparation method of whisker modified carbon/carbon composite material
The invention relates to a carbon/carbon composite material and a preparation method thereof, in particular to a nano SiO2 whisker modified carbon/carbon composite material and a preparation method thereof. Nano SiO2 whiskers are uniformly dispersed on the surface of each layer of carbonfiber web, the carbonfiber webs are overlaid layer by layer and woven, and a carbon fiber preform is obtained; CVI (chemical vapor infiltration) treatment is performed; a carbon fibergreen body containing pyrolytic carbon is obtained; and finally, graphitization treatment is performed, and the whisker modified carbon/carbon composite material is obtained. The nano SiO2 whiskers are uniformly added to full-web carbon fiber felt, pyrolytic carbonnucleation and growth environment in the CVI process is changed, the pyrolytic carbon structure is improved, the performance of the carbon/carbon composite material is improved; and compared with an unmodified carbon/carbon composite material, the degree of graphitization is increased by 25%-30%, the thermal conductivity is improved by 24%-28%, and the resistivity is reduced by 12%-15%.
Preparation method of whisker modified carbon/carbon composite material
The invention relates to a carbon/carbon composite material and a preparation method thereof, in particular to a nano SiO2 whisker modified carbon/carbon composite material and a preparation method thereof. Nano SiO2 whiskers are uniformly dispersed on the surface of each layer of carbonfiber web, the carbonfiber webs are overlaid layer by layer and woven, and a carbon fiber preform is obtained; CVI (chemical vapor infiltration) treatment is performed; a carbon fibergreen body containing pyrolytic carbon is obtained; and finally, graphitization treatment is performed, and the whisker modified carbon/carbon composite material is obtained. The nano SiO2 whiskers are uniformly added to full-web carbon fiber felt, pyrolytic carbonnucleation and growth environment in the CVI process is changed, the pyrolytic carbon structure is improved, the performance of the carbon/carbon composite material is improved; and compared with an unmodified carbon/carbon composite material, the degree of graphitization is increased by 25%-30%, the thermal conductivity is improved by 24%-28%, and the resistivity is reduced by 12%-15%.
Preparation method of whisker modified carbon/carbon composite material
ZHANG FUQIN (author) / XIA LIHONG (author) / WANG XINGXING (author) / ZHENG JIXIANG (author)
2015-04-01
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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