Formulations for oxidation protection of composite articles

Patent metadata

Field	Value
Publication number	US-10087101-B2
Application number	US-201514671637-A
Country	US
Kind code	B2
Filing date	Mar 27, 2015
Priority date	Mar 27, 2015
Publication date	Oct 2, 2018
Grant date	Oct 2, 2018

Abstract

The present disclosure includes carbon-carbon composite articles having oxidation protection coatings for limiting thermal and catalytic oxidation reactions and methods for applying oxidation protection coatings to carbon-carbon composite articles.

First claim

What is claimed is:

1. An article comprising:
a carbon-carbon composite structure;
an oxidation protection composition including a base layer disposed on an outer surface of the carbon-carbon composite structure and a sealing layer disposed on an outer surface of the base layer,
wherein the base layer comprises a first phosphate glass composition having a plurality of graphene nanoplatelets and a boron nitride additive dispersed throughout the base layer, and
wherein the sealing layer comprises a second phosphate glass composition and is substantially free of boron nitride.

2. The article of claim 1 , wherein the first phosphate glass composition of the base layer comprises between about 10 weight percent and about 35 weight percent of the boron nitride additive.

3. The article of claim 1 , wherein the first phosphate glass composition of the base layer 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 0.040 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 ).

4. The article of claim 1 , wherein the second phosphate glass composition of the sealing layer 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 0.040 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 ).

5. The article of claim 4 , wherein the second phosphate glass composition further comprises an aluminum phosphate.

6. The article of claim 1 , wherein the article comprises a component of an aircraft wheel braking assembly.

7. The article of claim 1 , wherein the second phosphate glass composition comprises 75.01% by weight a phosphate glass matrix.

8. The article of claim 7 , wherein the first phosphate glass composition comprises 73.22% by weight a first phosphate glass matrix and 24.54% by weight boron nitride.

9. The article of claim 7 , wherein the first phosphate glass composition comprises 80.2% by weight a first phosphate glass matrix and 17.53% by weight boron nitride.

Assignees

• Goodrich Corp

Inventors

• Mazany Anthony M

Classifications

• C23D3/00

  Chemical treatment of the metal surfaces prior to coating · CPC title

• C03C3/064

  containing boron · CPC title

• C04B41/52

  Multiple coating or impregnating {multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation} · CPC title

• F16D69/023

  Composite materials containing carbon and carbon fibres or fibres made of carbonizable material · CPC title

• C03C8/24

  Fusion seal compositions being frit compositions having non-frit additions, i.e. for use as seals between dissimilar materials, e.g. glass and metal; Glass solders · CPC title