High temperature oxidation protection for composites

Patent metadata

Field	Value
Publication number	US-11505507-B2
Application number	US-202117378207-A
Country	US
Kind code	B2
Filing date	Jul 16, 2021
Priority date	Dec 15, 2016
Publication date	Nov 22, 2022
Grant date	Nov 22, 2022

Abstract

The present disclosure provides a method for coating a composite structure, comprising forming a first slurry by combining a first pre-slurry composition comprising a first phosphate glass composition, with a primary flow modifier and a first carrier fluid, wherein the primary flow modifier comprises at least one of cellulose or calcium silicate; applying the first slurry on a surface of the composite structure to form a base layer; and heating the composite structure to a temperature sufficient to adhere the base layer to the composite structure.

First claim

What is claimed is:

1. A slurry for an oxidation protection system on a composite structure, comprising:
a carrier fluid;
a first pre-slurry composition comprising a first phosphate glass composition;
a primary flow modifier comprising at least one of cellulose or calcium silicate; and
a secondary flow modifier comprising at least one of poly(vinyl alcohol) or a salt of poly(acrylic acid).

2. The slurry of claim 1 , wherein the first pre-slurry composition comprises an acid aluminum phosphate, wherein a molar ratio of aluminum to phosphoric acid is between 1 to 2 and 1 to 3.

3. The slurry of claim 1 , wherein the first phosphate glass composition is represented by the formula a(A′ 2 O) x (P 2 O 5 ) y1 b(G f O) y2 c(A″O) z :
A′ is selected from: lithium, sodium, potassium, rubidium, cesium, and mixtures thereof;
G f is selected from: boron, silicon, sulfur, germanium, arsenic, antimony, and mixtures thereof;
A″ is selected from: vanadium, aluminum, tin, titanium, chromium, manganese, iron, cobalt, nickel, copper, mercury, zinc, thulium, lead, zirconium, lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, actinium, thorium, uranium, yttrium, gallium, magnesium, calcium, strontium, barium, tin, bismuth, cadmium, and mixtures thereof;
a is a number in the range from 1 to about 5;
b is a number in the range from 0 to about 10;
c is a number in the range from 0 to about 30;
x is a number in the range from about 0.050 to about 0.500;
y 1 is a number in the range from about 0.100 to about 0.950;
y 2 is a number in the range from 0 to about 0.20; and
z is a number in the range from about 0.01 to about 0.5;
( x+y 1 +y 2 +z )=1; and
x <( y 1 +y 2 ).

Assignees

• Goodrich Corp

Inventors

• Poteet Steven A

Classifications

• C03C3/097

  containing phosphorus, niobium or tantalum · CPC title

• C04B41/86 Primary

  Glazes; Cold glazes · CPC title

• C04B41/89

  for obtaining at least two superposed coatings having different compositions · CPC title

• B64C25/36

  Arrangements or adaptations of wheels, tyres or axles in general · CPC title

• B64C25/42

  Arrangement or adaptation of brakes · CPC title