Adhesion of a Substrate onto a CMC Component

Patent metadata

Field	Value
Publication number	US-2018297346-A1
Application number	US-201715490138-A
Country	US
Kind code	A1
Filing date	Apr 18, 2017
Priority date	Apr 18, 2017
Publication date	Oct 18, 2018
Grant date	—

Abstract

Methods for adhering a substrate onto a surface of a ceramic component are provided. The method may include applying a first bond coating onto an attachment surface of the substrate, applying a first alumina coating onto the first bond coating on the attachment surface of the substrate, applying a second bond coating onto an outer surface of the ceramic component, applying a second alumina coating onto the second bond coating on the attachment surface of the substrate, applying a cement onto at least one of the first alumina coating and the second alumina coating, and adhering the attachment surface of the substrate onto the outer surface of the ceramic component. Connections between a metal substrate and a ceramic matrix composite component are also provided.

First claim

What is claimed is:

1 . A method of adhering a substrate onto a surface of a ceramic component, the method comprising:
applying a first bond coating onto an attachment surface of the substrate; applying a first alumina coating onto the first bond coating on the attachment surface of the substrate; applying a second bond coating onto an outer surface of the ceramic component; applying a second alumina coating onto the second bond coating on the attachment surface of the substrate; applying a cement onto at least one of the first alumina coating and the second alumina coating; and adhering the attachment surface of the substrate onto the outer surface of the ceramic component.

2 . The method as in claim 1 , wherein the substrate is formed from a metal or metal alloy.

3 . The method as in claim 1 , wherein the ceramic component comprises a ceramic matrix composite, and wherein an environmental barrier coating is on the surface of the ceramic component.

4 . The method as in claim 1 , wherein the first bond coating comprises Ni and Al.

5 . The method as in claim 4 , wherein the first bond coating comprises NiCrAlY.

6 . The method as in claim 1 , wherein the first bond coating has a thickness of about 25 μm to about 100 μm, and wherein the first alumina coating has a thickness of about 25 μm to about 100 μm.

7 . The method as in claim 1 , wherein the second bond coating comprises silicon metal, and wherein the second bond coating has a thickness of about 50 μm to about 150 μm, and further wherein the second alumina coating has a thickness of about 25 μm to about 100 μm.

8 . The method as in claim 1 , wherein the cement comprises an alumina adhesive.

9 . The method as in claim 1 , wherein the substrate comprises a stem extending from the substrate and at least one retainer arm extending from the stem to a terminal end.

10 . The method as in claim 9 , further comprising:
applying a cement onto the terminal end of the stem; and adhering the terminal end of the stem onto the surface of the ceramic component.

11 . The method as in claim 1 , wherein the ceramic component defines an aperture on the surface, and wherein the substrate comprises a probe extending into the aperture.

12 . A connection between a metal substrate and a ceramic matrix composite component, comprising:
a first bond coating and a first alumina coating on an attachment surface of the substrate; a second bond coating and a second alumina coating on an outer surface of the ceramic component; and a cement positioned between the attachment surface on the substrate and the surface of the ceramic component, wherein the first alumina coating and the second alumina coating face each other.

13 . The connection as in claim 12 , wherein the ceramic component comprises a ceramic matrix composite.

14 . The connection as in claim 13 , wherein the ceramic component is a flowpath component of a gas turbine engine and defines an aperture on the surface, and wherein the substrate comprises a probe extending into the aperture.

15 . The connection as in claim 12 , wherein the ceramic component is a combustion liner of a gas turbine engine and defines an aperture on the surface, and wherein the substrate comprises a pressure probe extending into the aperture.

16 . The connection as in claim 12 ,
wherein the first bond coating is directly on the attachment surface of the substrate, and wherein the first alumina coating is directly on the first bond coating; and wherein the second bond coating is directly on the outer surface of the ceramic component, and wherein the second alumina coating is directly on the second bond coating.

17 . The connection as in claim 12 , wherein the first bond coating comprises NiCrAlY, and wherein the first bond coating has a thickness of about 25 μm to about 100 μm, and further wherein the first alumina coating has a thickness of about 25 μm to about 100 μm.

18 . The connection as in claim 12 , wherein the second bond coating comprises silicon metal, and wherein the second bond coating has a thickness of about 50 μm to about 150 μm, and further wherein the second alumina coating has a thickness of about 25 μm to about 100 μm.

19 . The connection as in claim 12 , wherein the substrate comprises a stem extending from the substrate, and wherein the connection further comprises at least one retainer arm extending from the stem to a terminal end, and wherein the at least one retainer arm is adhered to the outer surface of the ceramic component via the cement.

20 . The connection as in claim 12 , wherein the ceramic component defines an aperture on the surface, and wherein the substrate comprises a probe extending into the aperture.

Assignees

• Gen Electric

Inventors

• Aug Daniel James
• Brown Joshua Daniel
• Dziech Aaron Michael
• Fields Joseph Herbert
• Gessner Kenneth Michael

Classifications

• B32B2250/44

  Number of layers variable across the laminate · CPC title

• B32B2307/306

  Resistant to heat · CPC title

• B32B9/005

  comprising one layer of ceramic material, e.g. porcelain, ceramic tile (layered products with at least two ceramic layers composed mainly of ceramic B32B18/00) · CPC title

• B32B13/06

  of metal · CPC title

• B32B7/12 Primary

  using interposed adhesives or interposed materials with bonding properties · CPC title