US 12,246,994 B2
High temperature oxidation protection for composites
Steven A. Poteet, Hamden, CT (US); Katherine Urena Pimentel, Manchester, CT (US); Philip Sheehan, Pueblo West, CO (US); and John Weaver, Colorado Springs, CO (US)
Assigned to GOODRICH CORPORATION, Charlotte, NC (US)
Filed by GOODRICH CORPORATION, Charlotte, NC (US)
Filed on Oct. 23, 2020, as Appl. No. 17/079,239.
Claims priority of provisional application 62/954,113, filed on Dec. 27, 2019.
Prior Publication US 2021/0198159 A1, Jul. 1, 2021
Int. Cl. C04B 41/50 (2006.01); C04B 35/83 (2006.01); C04B 41/00 (2006.01); C04B 41/45 (2006.01); C04B 41/89 (2006.01)
CPC C04B 41/5058 (2013.01) [C04B 35/83 (2013.01); C04B 41/0072 (2013.01); C04B 41/009 (2013.01); C04B 41/4535 (2013.01); C04B 41/4584 (2013.01); C04B 41/5023 (2013.01); C04B 41/5031 (2013.01); C04B 41/5035 (2013.01); C04B 41/5059 (2013.01); C04B 41/507 (2013.01); C04B 41/89 (2013.01); C04B 2235/9684 (2013.01)] 12 Claims
 
1. A method for forming an oxidation protection system on a composite structure, comprising:
applying a composite slurry to the composite structure, wherein the composite slurry comprises boron carbide, silicon carbide, borosilicate glass, an oxygen reactant compound including a silica forming component, and a carrier fluid, and wherein the oxygen reactant compound is between 1.0% and 10.0% of a dry weight of the composite slurry, the composite slurry comprises from 10% to 40% by weight the boron carbide, the oxygen reactant compound comprises particles having an average particle size of between 20 nm and 20 μm, the boron carbide comprises a boron compound powder comprising particles having an average particle size between 100 nm and 100 μm, and the silicon carbide comprises a silicon carbide powder comprising particles having an average particle size of between 500 nm and 20 μm, and the composite slurry is substantially free of phosphate; and
heating the composite structure to a temperature sufficient to form a boron-silicon-glass-oxygen reactant layer on the composite structure.