Rapid densification of porous carbon–carbon composites by thermal‐gradient chemical vapor infiltration
作者:
I. Golecki,
R. C. Morris,
D. Narasimhan,
N. Clements,
期刊:
Applied Physics Letters
(AIP Available online 1995)
卷期:
Volume 66,
issue 18
页码: 2334-2336
ISSN:0003-6951
年代: 1995
DOI:10.1063/1.113974
出版商: AIP
数据来源: AIP
摘要:
Porous carbon–carbon preforms, 10.8 cm o.d.×4.4 cm i.d.×3.0 cm thick have been densified in a one‐cycle, 26 h process. The disks are heated by induction, creating an inside‐out thermal gradient, and are exposed to cyclopentane vapor in a water‐cooled vacuum chamber. Rough‐laminar carbon microstructure is obtained; a compressive strength of 268 MPa is measured at 1.79 g/ cm3density. The densification rate is monitored in real time. The precursor utilization efficiency is 20%–30%. Our patented process can be applied to other materials, has significant scale‐up potential and is economically competitive. ©1995 American Institute of Physics.
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