✦ LIBER ✦

Densification of carbon/carbon composites by pulse chemical vapor infiltration

✍ Scribed by Hyeok Je Jeong; Hee Dong Park; Jae Do Lee; Jong Ook Park

Publisher: Elsevier Science
Year: 1996
Tongue: English
Weight: 508 KB
Volume: 34
Category: Article
ISSN: 0008-6223
DOI: 10.1016/0008-6223(95)00208-1

No coin nor oath required. For personal study only.

✦ Synopsis

Two-dimensional carbon/carbon composites were densified with carbon by pyrolysis of propane using the pulse chemical vapor infiltration (CVI) process which repeats the cycle of evacuation and introduction of gas. The experimental parameters were deposition temperature, reactant gas concentration, flow rate, gas introduction time, evacuation time, and pulse number. The most effective parameters of pulse CVI to densify carbon/carbon composites are deposition temperature and gas introduction time. There was a deposition temperature at which the deposition rate was maximum. At higher deposition temperatures, soot was formed. When the gas introduction time was long, bulk density was higher and infiltration uniformity was better. Through these experiments, the optimum experimental condition for densification was found.

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