Carbon-carbon composite and method of making

Details Carbon-carbon composite and method of making Carbon-carbon composite and method of making

1989-01-18

1995-05-23

Nelson, Peter A.

Stock material or miscellaneous articles

Self-sustaining carbon mass or layer with impregnant or...

428552, 427113, B32B 900, B05D 512

Patent

active

054180635

ABSTRACT:
Carbon-Carbon composite products comprising laminate plies formed from the carbon fabric having pitch-based carbon strands of relatively high modulus of elasticity in the warp direction. The fill direction carbon strands have a relatively low modulus of elasticity when compared to the warp direction strands and have a substantially lower end count than the higher modulus warp direction strands. A carbonaceous matrix is integrated with the fabric plies in order to bond the plies together. The matrix material may be glassy carbon or more preferably a crystalline graphitized carbon. In forming such carbon-carbon composite products, a layup is established of a plurality of the carbon fabric plies impregnated with a carbon containing matrix material, typically a thermoset resin. The layup is cured or partially cured and then pyrolized to a temperature sufficient to carbonize the matrix material. The carbonized matrix material is then densified by chemical vapor infiltration (CVI) using a gaseous hydrocarbon material as a carbon source. Following the densification step, the layup is heated at an elevated temperature substantially in excess of the pyrolysis temperature which is sufficient to graphitize the matrix material.

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McAllister et al., Multidirectional Carbon-Carbon Composites, Handbook of Composites, vol. 4, pp. 109-175.
Delmonte, Technology of Carbon & Graphite Fiber Composites, Van Nostrand Reinhold Co., pp. 397-421.
Kirk-Othmer, Encyclopedia of Chemical Technology, 3rd Ed., 1978, vol. 4, pp. 622-631, "Carbon (Carbon and Artificial Graphite)".
Kirk-Othmer, Encyclopedia of Chemical Technology, 3rd Ed., Supp. vol., pp. 260-281, "Composites, High Performance".
Rubin, L., "High-Modulus Carbon Fiber Based Carbon-Carbon for Space Applications", 1986, Report No. SD-TR-86-45 Space Division, Air Force Systems Command, Los Angeles Air Force Station, Los Angeles, California 90009-2960.

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