作者：Zhang, JC;Luo, RY;Wu, XW;Li, Q;

作者单位：Beijing Univ Aeronaut & Astronaut, Coll Phys, Beijing 100083, Peoples R China.;Beijing Univ Aeronaut & Astronaut, Coll Phys, Beijing 100083, Peoples R China.;Beijing Univ Aeronaut & Astronaut, Coll Phys, Beijing 100083, Peoples R China.;Beijing Univ Aeron

刊名：Chemical vapor deposition

ISSN：0948-1907

出版年：2009-01-05

卷：15

期：40911

起页：33

止页：38

分类号：TQ175

语种：英文

关键词：carbon nanofibers;chemical vapor infiltration (CVI);fiber/matrix bond;hybrid multiscale composites;modeling;

内容简介

The simultaneous in-situ growth of carbon nanofibers (CNFs) and densification of a CNFs/CF hybrid multiscale felt are accomplished in a single step by thermal gradient chemical vapor infiltration using Fe as the catalyst and vaporized kerosene under atmospheric pressure. A three-dimensional CNF network which could bridge dissimilar components of composites is formed on carbon fibers (CFs). The length of CNFs can reach several micrometers and the diameters are about 80 rim. Smooth and rough surface densified CNFs can be produced after further higher temperature infiltration. CNFs, anchoring to CFs by the adherence of the catalyst nanoparticles, enhance the bonding between CFs and pyrocarbon as well as promoting the formation of a rough laminar pyrocarbon matrix. The deposition mechanisms and physical model are also discussed. This fast catalytic infiltration process can be applied to other ceramic materials and has significant enlargement potential.