Preparation of carbon/carbon composite by pyrolysis of ethanol and methane
Preparation of carbon/carbon composite by pyrolysis of ethanol and methane
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DOI：
10.1016/j.matdes.2014.08.036
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发表时间：
2015
影响因子：
8.4
通讯作者：
J. Ren;Kezhi Li;Shouyang Zhang;X. Yao;Song Tian
中科院分区：
文献类型：
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作者：
J. Ren;Kezhi Li;Shouyang Zhang;X. Yao;Song Tian
以乙醇和甲烷的混合气体为前驱体，采用等温化学气相渗透法制备了高织构C/C复合材料。在1180 °C下用2至IOkPa的气体压力渗透预成型件。对于85小时的渗透，平均体积密度高达1.8 ± 0.02 g cm−3。渗透碳的纹理进行了研究，通过偏光显微镜和其特征在于与援助的消光角。用扫描电镜观察了热解炭基体的织构和断口形貌。以乙醇和甲烷为原料，通过热解制得了具有高织构热解炭基体和高致密度的C/C复合材料。这表明乙醇和甲烷的混合物是制备C/C复合材料的一种很有前途的前驱体。
A high textured carbon/carbon (C/C) composite was prepared using the mixture gas of ethanol and methane as the precursor by isothermal chemical vapor infiltration. The preform was infiltrated at 1180 °C with the gas pressure from 2 to 10 kPa. For 85 h infiltration, the average bulk density is up to 1.8 ± 0.02 g cm−3. The texture of the infiltrated carbon was studied by polarized-light microscopy and characterized with the aid of the extinction angle. Texture and fracture morphology of the pyrolytic carbon matrix were observed using scanning electronic microscope. C/C composites with high textured pyrolytic carbon matrix and high density were obtained by pyrolysis of ethanol and methane. This indicates the mixture of ethanol and methane is a promising candidate of the precursors for the preparation of C/C composites.