Alternative TitleEffect of Carbon Matrix Structure on Electrical Properties of C/C Composites
庞生洋1; 刘峰2; 胡成龙1; 王石军1; 汤素芳1
Source Publication材料研究学报
Other AbstractC/C composites with different carbon matrix structures were prepared by CVI(chemical vapor infiltration)+PIC(resin precursor impregnation cracking)process using 2D carbon fiber needlepunched preforms as reinforcement and then were heat-treated at different temperatures.The effect of PyC(pyrolysis carbon)/ReC(resin carbon)ratio and degree of graphitization on the electrical resistivity of the composites was investigated.The results show that the electrical resistivity of the C/C composites of low density remains basically unchanged in a range of 27.3×10-6~28.0×10-6Ω·m with the increase of PyC/ReC,which can be mainly attributed to the opposite effect of the increase of lattice size and structural integrity of graphite microcrystals and the increase of porosity of the composites.However,the electrical resistivity of C/C composites of high density decreases from 24.9×10-6Ω·m to 20.5×10-6Ω·m with the increase of PyC/ReC ratio.Because the slight increase of the porosity has a small contribution on the difference of electrical resistivity by hindering the effective carrier transfer in the conductive network for the C/C composites of low porosity.The graphitization degree of C/C composites increases and the electrical resistivity decreases with the heat treatment temperature increased from 1800℃to 2500℃,which can be mainly attributed to the increase of carrier concentration and the weakening of grain boundary scattering.
Keyword复合材料 电阻率 炭基体 石墨化
Indexed ByCSCD
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Document Type期刊论文
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GB/T 7714
庞生洋,刘峰,胡成龙,等. 炭基体的结构对C/C复合材料导电性能的影响[J]. 材料研究学报,2019,33.0(012):935-941.
APA 庞生洋,刘峰,胡成龙,王石军,&汤素芳.(2019).炭基体的结构对C/C复合材料导电性能的影响.材料研究学报,33.0(012),935-941.
MLA 庞生洋,et al."炭基体的结构对C/C复合材料导电性能的影响".材料研究学报 33.0.012(2019):935-941.
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