Carbon-carbon composites including isotropic carbon encapsulating layer and methods of forming the same
AssigneeHoneywell International Inc.
InventorsMark L. La Forest, Slawomir T. Fryska, Ryan Bourlier, Mark Behnke
Life of this patent
Estimating the term…
Abstract
A technique of forming a carbon-carbon composite material includes infusing a liquid carbonizable precursor into a porous preform, and the infused precursor is subsequently pyrolyzed to convert the precursor to isotropic carbon. The preform then can be densified with a densifying agent, followed by infusion of the liquid carbonizable precursor into the densified preform. In some examples, after pyrolyzing the liquid carbonizable precursor, isotropic carbon extends substantially throughout a volume of the carbon-carbon composite material.
Claims20
A method comprising:
- infusing a liquid carbonizable precursor into a porous preform;
- pyrolyzing the infused liquid carbonizable precursor to convert the precursor to porous isotropic carbon;
- infusing a densifying agent into the porous preform including the porous isotropic carbon;
- pyrolyzing the densifying agent to form porous anisotropic carbon from the densifying agent;
- infusing the liquid carbonizable precursor into the porous preform including porous anisotropic carbon;
- and
- pyrolyzing the infused liquid carbonizable precursor to convert the precursor to isotropic carbon and form a carbon-carbon composite material.
A carbon-carbon composite material comprising:
- a plurality of carbon fibers;
- and
- a carbon matrix substantially fully encapsulating the plurality of carbon fibers, wherein the carbon matrix comprises anisotropic carbon formed by pyrolyzing a densifying agent, and isotropic carbon extends substantially throughout a volume of the carbon-carbon composite material.
A method comprising:
- infusing at least one of a furfuryl alcohol, a furfuryl acetone, and a furfuryl alcohol anhydride into a porous preform comprising carbon fiber or a carbon fiber precursor;
- pyrolyzing the infused at least one of a furfuryl alcohol, a furfuryl acetone, and a furfuryl alcohol anhydride to convert the infused at least one of a furfuryl alcohol, a furfuryl acetone, and a furfuryl alcohol anhydride to porous isotropic carbon and form a rigidized preform;
- infusing a densifying agent into the rigidized preform;
- pyrolyzing the densifying agent to form porous anisotropic carbon within the rigidized preform;
- infusing at least one of a furfuryl alcohol, a furfuryl acetone, and a furfuryl alcohol anhydride into the porous anisotropic carbon within the rigidized preform;
- and
- pyrolyzing the infused at least one of a furfuryl alcohol, a furfuryl acetone, and a furfuryl alcohol anhydride to convert the infused at least one of a furfuryl alcohol, a furfuryl acetone, and a furfuryl alcohol anhydride to isotropic carbon and form a carbon-carbon composite material, wherein the isotropic carbon extends substantially throughout the carbon-carbon composite material, and wherein the method does not include any chemical vapor deposition/chemical vapor infiltration processes.
Dependencies are inferred from the claim text.