Method of making composite casting and composite casting

• US 20070284073A1
• Filed: 06/08/2006
• Published: 12/13/2007
• 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.
• Granted Patent: US 8,283,047 B2
• Time in Patent Office: Days
• US Class Current: 164/100
• 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. Method of making a composite casting, including the steps of providing a reinforcement insert with a ceramic coating, positioning the coated insert in a mold, and introducing the molten metallic material into the mold where the metallic material is solidified.

2. The method of claim 1 wherein the molten metallic material comprises molten titanium or molten titanium alloy.

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

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

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

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

7. The method of claim 6 wherein the intermetallic compound comprises Ti and Al.

8. The method of claim 1 wherein the insert is coated with the ceramic coating by a vapor deposition of ceramic material thereon.

9. The method of claim 8 wherein the insert is coated with the ceramic coating by a electron beam physical vapor deposition of ceramic material thereon.

10. The method of claim 1 wherein the insert is coated by spraying the ceramic coating thereon.

11. The method of claim 10 wherein the insert is coated by plasma spraying or flame spraying.

12. The method of claim 1 wherein the insert is coated by applying a ceramic slurry to the insert and drying the slurry.

13. The method of claim 1 wherein the insert is coated with erbium oxide.

14. The method of claim 1 wherein the insert is coated with yttrium oxide.

15. The method of claim 1 wherein the insert is positioned in a ceramic investment shell mold.

16. The method of claim 1 wherein the insert is positioned in a metallic mold.

17. The method of claim 1 wherein the insert is positioned in a graphite mold.

18. The method of claim 1 wherein the insert is suspended in the mold.

19. A composite casting, comprising a reinforcement insert disposed in a metallic matrix with a ceramic material between the reinforcement insert and the matrix.

20. The casting of claim 19 wherein the metallic matrix comprises titanium or a titanium alloy.

21. The casting of claim 19 wherein the insert comprises silicon carbide.

22. The casting of claim 19 wherein the insert comprises boron carbide.

23. The casting of claim 19 wherein the insert comprises silicon nitride.

24. The casting of claim 19 wherein the insert comprises an intermetallic compound.

25. The casting of claim 19 wherein the ceramic material comprises erbium oxide or yttrium oxide.

26. A composite casting, comprising a reinforcement insert disposed in a metallic matrix comprising titanium with a ceramic insert coating selected from the group consisting of erbium oxide and yttrium oxide between the reinforcement insert and the matrix.

27. The casting of claim 26 wherein the insert comprises silicon carbide.

28. The casting of claim 26 wherein the insert comprises boron carbide.

29. The casting of claim 26 wherein the insert comprises, silicon nitride.

30. The casting of claim 26 wherein the insert comprises an intermetallic compound.