以甲烷为碳源，通过化学气相沉积和化学蒸汽渗透两步法将热解炭填充至碳纳米管阵列间的空隙而制备出碳纳米管阵列/热解炭复合材料。采用扫描电镜和拉曼光谱仪对样品的结构进行表征。结果表明，碳纳米管被热解炭填充和覆盖形成均相的复合膜，其密度增加4倍，同时热解炭已石墨化。
A two-step preparation of aligned CNT ( ACNT )/pyrolytic carbon composites was carried out with chemical vapor deposition and chemical vapor infiltration by filling the space within the ACNT film with pyrolytic carbon, using methane as carbon precursor. The structure of the composites was investigated by scanning electron microscopy and Raman spectroscopy. Results showed that the CNTs were coated unevenly with densely-packed carbon spheres at 950℃. At 1 050℃, the CNTs were uniformly coated which increased their diameters from 20-60 nm to 400-500 nm and closed pores were formed as a result of the fast formation and a slow diffusion of carbonaceous nuclei during the latter stages of deposition. At both temperatures, the density of the film in-creased more than four fold when the pyrolytic carbon was graphitized.
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