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Fabrication of carbon-carbon composites by forced flow-thermal gradient chemical vapor infiltration

Published online by Cambridge University Press:  03 March 2011

Sundar Vaidyaraman ,
W. Jack Lackey ,
Garth B. Freeman ,
Pradeep K. Agrawal  and
Matthew D. Langman
Sundar Vaidyaraman
Affiliation:
School of Chemical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332
W. Jack Lackey
Affiliation:
Georgia Tech Research Institute, Georgia Institute of Technology, Atlanta, Georgia 30332
Garth B. Freeman
Affiliation:
Georgia Tech Research Institute, Georgia Institute of Technology, Atlanta, Georgia 30332
Pradeep K. Agrawal
Affiliation:
School of Chemical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332
Matthew D. Langman
Affiliation:
Georgia Tech Research Institute, Georgia Institute of Technology, Atlanta, Georgia 30332
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Abstract

Carbon fiber-carbon matrix composites were fabricated using the forced flow-thermal gradient chemical vapor infiltration (FCVI) process. The preforms for the infiltration were prepared by stacking 40 layers of carbon cloth in a graphite holder. The preforms were infiltrated with carbon using propylene or methane as a reactant, with hydrogen as a diluent. Composites with porosities as low as 7% have been processed within 8-12 h. The highest deposition rate obtained in the present study was ∼3 μm/h, which is more than an order of magnitude faster than the typical value of 0.1-0.25 μm/h for the isothermal infiltration process.

Type
Articles
Information
Journal of Materials Research , Volume 10 , Issue 6 , June 1995 , pp. 1469 - 1477
Copyright
Copyright © Materials Research Society 1995

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