Adhesive composition, carbon-carbon composite structures prepared therewith, and method of forming same
AssigneeSouthwest Research Institute
InventorsRenee C. Graef, David G. Paquette, Stuart T. Schwab
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Abstract
An adhesive composition for joining carbon-carbon composites comprising a polymeric thermosetting polysilazane, a ceramic powder, silicon powder, and carbon powder. The invention also comprises the method of making carbon-carbon composite structures utilizing such adhesive composition and to the resultant products.
Claims8
A carbon-carbon composite structure comprising at least two shaped carbon-carbon composites having at least a portion of a surface of each composite joined together with an adhesive comprising a polymeric thermosetting polysilazane, and for each 100 parts by weight thereof, 20 to 50 parts by weight of a ceramic powder, 10 to 40 parts by weight of silicon powder, and 5 to 15 parts by weight of carbon powder, which adhesive has been cured and fired to convert said polysilazane to a ceramic.
A method of forming a carbon-carbon composite structure comprising applying a curable adhesive layer onto at least a portion of a surface of a first shaped carbon-carbon composite, said adhesive comprising a polymeric thermosetting polysilazane, and for each 100 parts by weight thereof, 20 to 50 parts by weight of a ceramic powder, 10 to 40 parts by weight of silicon powder, and 5 to 15 parts by weight of carbon powder, placing at least a portion of a surface of at least one other shaped carbon-carbon composite in contact with said adhesive layer on said first shaped carbon-carbon composite to form said structure, curing said adhesive while maintaining said first and at least one other shaped carbon-carbon composite in contact, and then firing said structure at a temperature and for a time sufficient to convert said polysilazane to a ceramic.
Dependencies are inferred from the claim text.