Patent ID: 11873260
Assignee: GOODRICH CORPORATION
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  F | IPC C

Claim 4:
5. A method for forming an oxidation protection system on a composite structure, comprising: applying a boron slurry to the composite structure, wherein a first average particle size of a first group of boron compound particles in the boron slurry is about 9.3 micrometers, wherein a second average particle size of a second group of boron compound particles in the boron slurry is about 0.7 micrometers, and wherein the boron slurry comprises about 7.2% by weight boron carbide having the second average particle size of about 0.7 micrometers and about 16.9% by weight boron carbide having the first average particle size of about 9.3 micrometers;
performing a first low temperature bake by heating the composite structure at a first temperature;
applying a silicon slurry to the composite structure, wherein a third average particle size of a first group of silicon compound particles in the silicon slurry is about 1 micrometer, wherein a fourth average particle size of a second group of silicon compound particles in the silicon slurry is about 17 micrometers, and wherein the silicon slurry comprises about 9.3% by weight silicon carbide having the fourth average particle size of about 17 micrometers and about 21.7% by weight silicon carbide having the third average particle size of about 1 micrometers;
performing a second low temperature bake by heating the composite structure at a second temperature; and
performing a high temperature heat treatment by heating the composite structure at a third temperature, the third temperature being greater than the first temperature and the second temperature.