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Title: Method of making carbon-carbon composites

Abstract

A process for making 2D and 3D carbon-carbon composites having a combined high crystallinity, high strength, high modulus and high thermal and electrical conductivity. High-modulus/high-strength mesophase derived carbon fibers are woven into a suitable cloth. Layers of this easily graphitizible woven cloth are infiltrated with carbon material to form green composites. The carbonized composite is then impregnated several times with pitch by covering the composite with hot pitch under pressure. The composites are given a heat treatment between each impregnant step to crack up the infiltrated carbon and allow additional pitch to enter the microstructure during the next impregnation cycle. The impregnated composites are then given a final heat treatment in the range 2500.degree. to 3100.degree. C. to fully graphitize the fibers and the matrix carbon. The composites are then infiltrated with pyrolytic carbon by chemical vapor deposition in the range 1000.degree. C. to 1300.degree. C. at a reduced. pressure.

Inventors:
 [1]
  1. (16716 Martincoit Rd., Poway, CA 92064)
Issue Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA
OSTI Identifier:
868810
Patent Number(s):
5217657
Assignee:
Engle, Glen B. (16716 Martincoit Rd., Poway, CA 92064) SNL
DOE Contract Number:  
AC04-76
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; carbon-carbon; composites; process; 2d; 3d; combined; crystallinity; strength; modulus; thermal; electrical; conductivity; high-modulus; high-strength; mesophase; derived; carbon; fibers; woven; suitable; cloth; layers; easily; graphitizible; infiltrated; material; form; green; carbonized; composite; impregnated; times; pitch; covering; hot; pressure; heat; treatment; impregnant; step; crack; allow; additional; enter; microstructure; impregnation; cycle; final; range; 2500; degree; 3100; graphitize; matrix; pyrolytic; chemical; vapor; deposition; 1000; 1300; reduced; carbon-carbon composites; matrix carbon; pyrolytic carbon; carbon fibers; carbon fiber; chemical vapor; vapor deposition; heat treatment; electrical conductivity; carbon composite; carbon material; carbonized composite; woven cloth; mesophase derived; final heat; infiltrated carbon; high-strength mesophase; carbon composites; carbon-carbon composite; /264/423/427/

Citation Formats

Engle, Glen B. Method of making carbon-carbon composites. United States: N. p., 1993. Web.
Engle, Glen B. Method of making carbon-carbon composites. United States.
Engle, Glen B. Fri . "Method of making carbon-carbon composites". United States. https://www.osti.gov/servlets/purl/868810.
@article{osti_868810,
title = {Method of making carbon-carbon composites},
author = {Engle, Glen B.},
abstractNote = {A process for making 2D and 3D carbon-carbon composites having a combined high crystallinity, high strength, high modulus and high thermal and electrical conductivity. High-modulus/high-strength mesophase derived carbon fibers are woven into a suitable cloth. Layers of this easily graphitizible woven cloth are infiltrated with carbon material to form green composites. The carbonized composite is then impregnated several times with pitch by covering the composite with hot pitch under pressure. The composites are given a heat treatment between each impregnant step to crack up the infiltrated carbon and allow additional pitch to enter the microstructure during the next impregnation cycle. The impregnated composites are then given a final heat treatment in the range 2500.degree. to 3100.degree. C. to fully graphitize the fibers and the matrix carbon. The composites are then infiltrated with pyrolytic carbon by chemical vapor deposition in the range 1000.degree. C. to 1300.degree. C. at a reduced. pressure.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {1}
}

Patent:

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