IP Library Granted Patent US 12,344,564
Granted Patent B2
US 12,344,564 · App. 17/571,083 · Granted Jul 1, 2025

Oxidation protection with improved water resistance for composites

Inventors: Jun Nable (Hamden, CT); Steven A. Poteet (Ashland, MA); Xia Tang (West Hartford, CT); James T. Beals (West Hartford, CT)
Assignee: GOODRICH CORPORATION
C04B41/009C04B35/563C04B35/583C04B41/0072C04B41/5022C04B41/5035C04B41/52C04B41/86C04B41/89C04B2235/3217C04B2235/3418C04B2235/365C04B2235/3804C04B2235/3821C04B2235/386C04B2235/447C04B2235/9684
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Quick Facts
Patent No.
US 12,344,564
App. No.
17/571,083
Granted
Jul 1, 2025
Kind
B2
Abstract

Systems and methods for forming an oxidation protection system on a composite structure are provided. In various embodiments, the oxidation protection system comprises a boron-glass layer formed on the composite substrate and a silicon-glass layer formed over the boron-glass layer. Each of the boron-glass layer and the silicon-glass layer includes a glass former.

Claims (11)

1. An oxidation protection system disposed on an outer surface of a substrate, the oxidation protection system, comprising:

a boron-glass layer disposed over the outer surface, the boron-glass layer comprising a boron compound, a first glass compound, and a first glass former, wherein the boron compound comprises a mixture of boron carbide powder and boron nitride powder, the boron nitride powder being a greater weight percentage of the boron compound than the boron carbide powder; and

a silicon-glass layer disposed on the boron-glass layer, the silicon-glass layer comprising a silicon compound, a second glass compound, and a second glass former.

2. The oxidation protection system of claim 1 , wherein at least one of the first glass former or the second glass former comprises silica, and wherein at least one of the first glass compound or the second glass compound comprises borosilicate glass.

3. The oxidation protection system of claim 2 , further comprising a pretreatment layer formed between the boron-glass layer and the outer surface of the substrate, the pretreatment layer including at least one of aluminum oxide, silicon dioxide, or monoaluminium phosphate.

4. The oxidation protection system of claim 2 , wherein at least one of the boron-glass layer or the silicon-glass layer includes monoaluminium phosphate.

5. The oxidation protection system of claim 2 , wherein the boron-glass layer further comprises aluminum oxide, and wherein the silicon-glass layer further comprises zirconium boride.

6. The oxidation protection system of claim 2 , wherein the first glass former comprises silica, the first glass former is between 10% and 40% by weight percentage of the boron-glass layer, and the boron compound is between 7% and 18% by weight percentage of the boron-glass layer.

7. The oxidation protection system of claim 6 , wherein the boron carbide powder forms between 4% and 6% of the weight percentage of the boron-glass layer and the boron nitride powder forms between 10% and 13% of the weight percentage of the boron-glass layer.

8. The oxidation protection system of claim 6 , wherein the boron carbide powder forms between 1% and 2.5% of the weight percentage of the boron-glass layer and the boron nitride powder forms between 4.5% and 6.5% of the weight percentage of the boron-glass layer.

9. The oxidation protection system of claim 6 , wherein the boron carbide powder has an average particle size between 5 μm and 10 μm.

Assignments (3)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 12, 2022
From: RAYTHEON TECHNOLOGIES CORPORATION
To: GOODRICH CORPORATION
Reel/Frame 059574/0946 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 28, 2022
From: NABLE, JUN; POTEET, STEVEN A.
To: GOODRICH CORPORATION
Reel/Frame 059411/0500 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 28, 2022
From: TANG, XIA; BEALS, JAMES T.
To: RAYTHEON TECHNOLOGIES CORPORATION
Reel/Frame 059411/0548 →
Continuity (1)
Related Publication 20230219859A1 · Jul 13, 2023
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