Deposition mechanism and microstructure of pyrocarbon prepared by chemical vapor infiltration with kerosene as precursor

被引：25

作者：

Wu, Xiaowen ^{[1
]}

Luo, Ruiying ^{[1
]}

Zhang, Jincao ^{[1
]}

Xiang, Qiao ^{[1
]}

Ni, Yongfeng ^{[1
]}

机构：

[1] Beihang Univ, Sch Sci, Ctr Mat Phys & Chem, Beijing 100191, Peoples R China

来源：

CARBON | 2009年 / 47卷 / 06期

关键词：

PYROLYTIC CARBON; C/C COMPOSITES; DENSIFICATION; KINETICS; CHEMISTRY; PREFORM; CVI;

D O I：

10.1016/j.carbon.2009.01.035

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Large-size carbon/carbon composites (phi 450 x phi 230 x 15 mm(3)) have been produced by chemical vapor infiltration with kerosene as precursor. The microstructure of pyrocarbon was examined by polarized light microscopy and scanning electron microscopy. The infiltration kinetics was analyzed to investigate the infiltration rate limitation by parameters such as temperature. The results show that rough laminar carbon constitutes the majority of the matrix at a medium temperature (about 1100 degrees C), while smooth laminar and isotropic structures occur at temperatures lower than 1000 degrees C and higher than about 1200 degrees C, respectively. The apparent activation energy of kerosene decomposition in the temperature range 900-1200 degrees C is about 125.6 kJ/mol. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1429 / 1435

页数：7

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