Multiphase compositions for oxidation protection of composite articles

Patent metadata

Field	Value
Publication number	US-9790133-B2
Application number	US-201514671430-A
Country	US
Kind code	B2
Filing date	Mar 27, 2015
Priority date	Mar 27, 2015
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

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

First claim

What is claimed is:

1. A method for limiting an oxidation reaction in a composite substrate, comprising:
mixing a first glass phase matrix with a second glass phase matrix to form a multiphase glass slurry, wherein the second glass phase matrix has a second glass transition temperature that is at least 100 degrees Celsius higher than a first glass transition temperature of the first glass phase matrix; wherein the second glass phase matrix comprises at least one of: a first sealing glass having a density of 2.99 grams per cubic centimeter (g/cc), a softening point of 395° C., a coefficient of thermal expansion of 21.6 ppm/° C., and a glass transition temperature of 318° C.; a second sealing glass having a density of 6.79 g/cc, a softening point of 408° C., a coefficient of thermal expansion of 10.5 ppm/° C., and a glass transition temperature of 324° C.; a third sealing glass having a density of 2.96 g/cc, a softening point of 422° C., a coefficient of thermal expansion of 20 ppm/° C., and a glass transition temperature of 350° C.; a fourth sealing glass having a density of 5.73 g/cc, a softening point of 490° C., a coefficient of thermal expansion of 8.2 ppm/° C., and a glass transition temperature of 411° C.; a fifth sealing glass having a density of 2.34 g/cc, a softening point of 590° C., a coefficient of thermal expansion of 9.4 ppm/° C., and a glass transition temperature of 465° C.; a sixth sealing glass having a density of 3.32 g/cc, a softening point of 622° C., a coefficient of thermal expansion of 5.8 ppm/° C., and a glass transition temperature of 460° C.; a seventh sealing glass having a density of 2.61 g/cc, a softening point of 639° C., a coefficient of thermal expansion of 9.3 ppm/° C., and a glass transition temperature of 487° C.; an eighth sealing glass having a density of 3.14 g/cc, a softening point of 648° C., a coefficient of thermal expansion of 4 ppm/° C., and a glass transition temperature of 539° C.; a ninth sealing glass having a density of 2.59 g/cc, a softening point of 654° C., a coefficient of thermal expansion of 10 ppm/° C., and a glass transition temperature of 481° C.; a tenth sealing glass having a density of 3.03 g/cc, a softening point of 658° C., a coefficient of thermal expansion of 8.7 ppm/° C., and a glass transition temperature of 589° C.; an eleventh sealing glass having a density of 2.25 g/cc, a softening point of 673° C., a coefficient of thermal expansion of 5.7 ppm/° C., and a glass transition temperature of 577° C.; a twelfth sealing glass having a density of 2.41 g/cc, a softening point of 680° C., a coefficient of thermal expansion of 5 ppm/° C., and a glass transition temperature of 505° C.; a thirteenth sealing glass having a density of 2.66 g/cc, a softening point of 699° C., a coefficient of thermal expansion of 7.2 ppm/° C., and a glass transition temperature of 613° C.; a fourteenth sealing glass having a density of 2.91 g/cc, a softening point of 717° C., a coefficient of thermal expansion of 3.1 ppm/° C., and a glass transition temperature of 575° C.; a fifteenth sealing glass having a density of 2.33 g/cc, a softening point of 717° C., and a coefficient of thermal expansion of 4.3 ppm/° C.; a sixteenth sealing glass having a density of 2.34 g/cc, a softening point of 719° C., a coefficient of thermal expansion of 4.7 ppm/° C., and a glass transition temperature of 544° C.; a seventeenth sealing glass having a density of 2.55 g/cc, a softening point of 726° C., a coefficient of thermal expansion of 5.9 ppm/° C., and a glass transition temperature of 650° C.; or an eighteenth sealing glass having a density of 2.72 g/cc, a softening point of 862° C., a coefficient of thermal expansion of 5.2 ppm/° C., and a glass transition temperature of 717° C.; applying the multiphase glass slurry to an outer surface of a carbon-carbon composite structure; and
heating the carbon-carbon composite structure to a temperature sufficient to adhere the multiphase glass slurry to the carbon-carbon composite structure.

2. The method of claim 1 , wherein the first glass phase matrix 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 ).

3. The method of claim 1 , wherein prior to applying the multiphase glass slurry to the carbon-carbon composite structure, a first pretreating composition is applied to the outer surface of the carbon-carbon composite structure, the first pretreating composition comprising an aluminum oxide and water and an optional surfactant.

4. The method of claim 3 , wherein after applying the first pretreating composition to the outer surface of the carbon-carbon composite structure, the carbon-carbon structure is heated, and wherein after heating the carbon-carbon structure, a second pretreating composition comprising a phosphoric acid, one of an aluminum phosphate, an aluminum hydroxide, and an aluminum oxide, and a metal salt is applied to an outer surface of the first pretreating composition, wherein the carbon-carbon composite structure is porous and the second pretreating composition penetrates at least some of a plurality of pores of the carbon-carbon composite structure.

5. The method of claim 2 , wherein the multiphase glass slurry comprises between about 5% by weight and about 15% by weight of ammonium dihydrogen phosphate.

6. The method of claim 1 , wherein the multiphase glass slurry comprises between about 1% by weight and about 15% by weight of the second glass phase matrix.

Assignees

• Goodrich Corp

Inventors

• Mazany Anthony M

Classifications

• B05D3/0254

  After-treatment · CPC title

• B05D3/104

  Pretreatment of other substrates · CPC title

• C03C8/22

  containing two or more distinct frits having different compositions · CPC title

• C04B41/89

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

• C04B41/4539

  as a emulsion, dispersion or suspension · CPC title