Alloys comprising chromium and second metal material

Patent metadata

Field	Value
Publication number	US-11674205-B2
Application number	US-201916538026-A
Country	US
Kind code	B2
Filing date	Aug 12, 2019
Priority date	Mar 14, 2013
Publication date	Jun 13, 2023
Grant date	Jun 13, 2023

Abstract

Provided in one embodiment is a method, comprising: sintering a plurality of nanocrystalline particulates to form a nanocrystalline alloy, wherein at least some of the nanocrystalline particulates may include a non-equilibrium phase comprising a first metal material and a second metal material, and the first metal material may be soluble in the second metal material. The sintered nanocrystalline alloy may comprise a bulk nanocrystalline alloy.

First claim

What is claimed:

1. A sintered alloy, comprising:
Cr present in an amount of at least about 60 at %, and
at least one of the following elements present in an amount greater than or equal to 7.5 at %: Pd, Pt, Ni, Co, Ti, V, and Sc,
wherein the sintered alloy has a relative density of at least about 90%; and
wherein the sintered alloy has an average grain size of less than 1000 nm.

2. The sintered alloy of claim 1 , wherein the sintered alloy comprises the Cr and the Pd, Pt, Ni, Co, Ti, V, and/or Sc in a solid solution.

3. The sintered alloy of claim 1 , wherein the sintered alloy comprises Ti present in an amount greater than or equal to 7.5 at %.

4. The sintered alloy of claim 1 , wherein the sintered alloy is substantially thermodynamically stable at a temperature that is greater than or equal to about 1,000° C.

5. The sintered alloy of claim 1 , wherein the sintered alloy has a relative density of at least about 95%.

6. The sintered alloy of claim 1 , wherein the sintered alloy has a relative density of at least about 98%.

7. The sintered alloy of claim 1 , wherein the sintered alloy comprises Pd present in an amount greater than or equal to 7.5 at %.

8. The sintered alloy of claim 1 , wherein the sintered alloy comprises Pt present in an amount greater than or equal to 7.5 at %.

9. The sintered alloy of claim 1 , wherein the sintered alloy comprises Co present in an amount greater than or equal to 7.5 at %.

10. The sintered alloy of claim 1 , wherein the sintered alloy comprises V present in an amount greater than or equal to 7.5 at %.

11. The sintered alloy of claim 1 , wherein the sintered alloy comprises Sc present in an amount greater than or equal to 7.5 at %.

12. The sintered alloy of claim 1 , wherein the sintered alloy comprises Ni present in an amount of greater than or equal to 7.5 at %.

13. The sintered alloy of claim 1 , wherein at least one of the following elements is present in an amount greater than or equal to 10 at %: Pd, Pt, Ni, Co, Ti, V, and Sc.

14. The sintered alloy of claim 1 , wherein at least one of the following elements is present in an amount greater than or equal to 12.5 at %: Pd, Pt, Ni, Co, Ti, V, and Sc.

15. The sintered alloy of claim 1 , wherein at least one of the following elements is present in an amount greater than or equal to 15 at %: Pd, Pt, Ni, Co, Ti, V, and Sc.

16. A bulk alloy, comprising:
Cr present in an amount of at least about 60 at %, and
at least one of the following elements present in an amount greater than or equal to 7.5 at %: Pd, Pt, Ni, Co, Ti, V, and Sc,
wherein the bulk alloy has a relative density of at least about 90%; and
wherein the bulk alloy has an average grain size of less than 1000 nm.

17. The bulk alloy of claim 16 , wherein the bulk alloy comprises Pd present in an amount greater than or equal to 7.5 at %.

18. The bulk alloy of claim 16 , wherein the bulk alloy comprises Pt present in an amount greater than or equal to 7.5 at %.

19. The bulk alloy of claim 16 , wherein the bulk alloy comprises Co present in an amount greater than or equal to 7.5 at %.

20. The bulk alloy of claim 16 , wherein the bulk alloy comprises Ti present in an amount greater than or equal to 7.5 at %.

21. The bulk alloy of claim 16 , wherein the bulk alloy comprises V present in an amount greater than or equal to 7.5 at %.

22. The bulk alloy of claim 16 , wherein the bulk alloy comprises Sc present in an amount greater than or equal to 7.5 at %.

23. The bulk alloy of claim 16 , wherein the bulk alloy comprises Ni present in an amount of greater than or equal to 7.5 at %.

24. The bulk alloy of claim 16 , wherein at least one of the following elements is present in an amount greater than or equal to 10 at %: Pd, Pt, Ni, Co, Ti, V, and Sc.

25. The bulk alloy of claim 16 , wherein at least one of the following elements is present in an amount greater than or equal to 12.5 at %: Pd, Pt, Ni, Co, Ti, V, and Sc.

26. The bulk alloy of claim 16 , wherein at least one of the following elements is present in an amount greater than or equal to 15 at %: Pd, Pt, Ni, Co, Ti, V, and Sc.

27. The bulk alloy of claim 16 , wherein the bulk alloy has a relative density of at least about 95%.

28. The bulk alloy of claim 16 , wherein the bulk alloy has a relative density of at least about 98%.

Assignees

• Massachusetts Inst Technology

Inventors

• Schuh Christopher A
• Park Mansoo

Classifications

• B22F2998/10

  Processes characterised by the sequence of their steps · CPC title

• B22F3/10 Primary

  Sintering only · CPC title

• C22C27/04 Primary

  Alloys based on tungsten or molybdenum · CPC title

• B22F3/1035

  Liquid phase sintering · CPC title

• C22C27/06

  Alloys based on chromium · CPC title