Method of making composite casting and composite casting

• US 8,283,047 B2
• Filed: 06/08/2006
• Issued: 10/09/2012
• Est. Priority Date: 06/08/2006
• Status: Active Grant

• Current Assignee: Howmet Aerospace, Inc.
• Original Assignee: Howmet Corporation (Howmet Aerospace, Inc.)
• Inventors: Vogt, Russell G., Wolter, George W.
• Primary Examiner(s): McNeil, Jennifer
• Assistant Examiner(s): Savage, Jason L
• Application Number:
  US11/449,389
• Publication Number:
  US 20070284073A1
• Time in Patent Office: 2,315 Days
• Field of Search: None
• US Class Current: 428/614
• CPC Class Codes: B22D 19/02 for making reinforced articles B22D19/14 takes precedence
• CPC Class Codes: B22D 19/14 the objects being filamentary or particulate in form making alloys containing fibres or filaments by contacting the fibres or filaments with molten metal C22C47/08
• CPC Class Codes: Y10T 428/12486 Laterally noncoextensive components [e.g., embedded, etc.]
• CPC Class Codes: Y10T 428/12493 Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
• CPC Class Codes: Y10T 428/12576 Boride, carbide or nitride component
• CPC Class Codes: Y10T 428/31678 Of metal

Abstract

Method of making a composite casting involves providing a reinforcement insert with a ceramic coating, positioning the coated insert in a mold, and casting the molten metallic material into the mold where the metallic material is solidified. The composite casting produced includes the reinforcement insert disposed in a solidified metallic matrix with a ceramic coating between the reinforcement insert and the matrix.

Claims

1. A composite casting, comprising a reinforcement insert having an oxide ceramic insert coating thereon and disposed in a cast and solidified metallic matrix with the cast and solidified matrix against the ceramic insert coating wherein the ceramic insert coating has a thickness of about 0.1 mil to about 5 mils and is substantially non-reacted with the cast and solidified matrix.

2. The casting of claim 1 wherein the metallic matrix comprises titanium or a titanium alloy.

3. The casting of claim 1 wherein the insert comprises silicon carbide.

4. The casting of claim 1 wherein the insert comprises boron carbide.

5. The casting of claim 1 wherein the insert comprises silicon nitride.

6. The casting of claim 1 wherein the insert comprises an intermetallic compound.

7. The casting of claim 1 wherein the oxide ceramic material comprises erbium oxide or yttrium oxide.

8. The casting of claim 1 wherein the insert is plate-shaped.

9. A composite casting, comprising a reinforcement insert having a ceramic insert coating and disposed in a cast and solidified metallic matrix comprising titanium with the cast and solidified matrix against the ceramic insert coating wherein the ceramic insert coating is selected from the group consisting of erbium oxide and yttrium oxide and the matrix and wherein the ceramic insert coating has a thickness of about 0.1 mil to about 5 mils and is substantially non-reacted with the cast and solidified matrix comprising titanium.

10. The casting of claim 9 wherein the insert comprises silicon carbide.

11. The casting of claim 9 wherein the insert comprises boron carbide.

12. The casting of claim 9 wherein the insert comprises silicon nitride.

13. The casting of claim 9 wherein the insert comprises an intermetallic compound.

14. The casting of claim 9 wherein the insert is plate-shaped.