High Entropy NiMn-based Magnetic Refrigerant Materials

• US 20160025386A1
• Filed: 07/23/2015
• Published: 01/28/2016
• Est. Priority Date: 07/28/2014
• Status: Abandoned Application

• Current Assignee: UT-Battelle LLC
• Original Assignee: UT-Battelle LLC
• Inventors: Barabash, Rozailya I., Barabash, Oleg M., Porter, Wallace D., Vineyard, Edward A., Watkins, Thomas R.
• Application Number:
  US14/807,203
• Publication Number:
  US 20160025386A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: C22C 19/005 with Manganese as the next major constituent
• CPC Class Codes: C22C 19/03 based on nickel
• CPC Class Codes: C22C 30/00 Alloys containing less than 50% by weight of each constituent
• CPC Class Codes: F25B 21/00 Machines, plants or systems, using electric or magnetic effects
• CPC Class Codes: F25B 2321/002 by using magneto-caloric effects
• CPC Class Codes: Y02B 30/00 Energy efficient heating, ventilation or air conditioning [HVAC]

Abstract

A magnetocaloric alloy composition consists essentially of 20-40 weight % Mn, 6-26 weight % In, 1-5 weight % Si, and 0.3-12 wt. % of at least one other element selected from the group consisting of: Ga, Ge, Ag, Gd, Co, Pd, Sm, V, and Sn, balance Ni.

Claims

1. A magnetocaloric alloy composition consisting essentially of 20-40 weight % Mn, 6-26 weight % In, 1-5 weight % Si, and 0.3-12 wt. % of at least one other element selected from the group consisting of:

Ga, Ge, Ag, Gd, Co, Pd, Sm, V, and Sn, balance Ni.

2. A magnetocaloric alloy composition in accordance with claim 1 wherein said at least one other element comprises 6 to 9 weight % Ga.

3. A magnetocaloric alloy composition in accordance with claim 1 wherein said at least one other element comprises 0.2 to 1 weight % Ge.

4. A magnetocaloric alloy composition in accordance with claim 1 wherein said at least one other element comprises 7 to 9 weight % Ag.

5. A magnetocaloric alloy composition in accordance with claim 1 wherein said at least one other element comprises 3 to 8 weight % Gd.

6. A magnetocaloric alloy composition in accordance with claim 1 wherein said at least one other element comprises 4 to 5 weight % Co.

7. A magnetocaloric alloy composition in accordance with claim 1 wherein said at least one other element comprises 7 to 9 weight % Pd.

8. A magnetocaloric alloy composition in accordance with claim 1 wherein said at least one other element comprises 6 to 9 weight % Sm.

9. A magnetocaloric alloy composition in accordance with claim 1 wherein said at least one other element comprises 2 to 3 weight % V.

10. A magnetocaloric alloy composition in accordance with claim 1 wherein said at least one other element comprises 10 to 12 weight % Sn.

11. A magnetocaloric device comprising at least one magnetocaloric material, at least one magnet, apparatus for moving said magnetocaloric material into and out of proximity with said magnet, and apparatus for transferring heat to and from said magnetocaloric material, said magnetocaloric material consisting essentially of 20-40 weight % Mn, 6-26 weight % In, 1-5 weight % Si, and 0.3-12 wt. % of at least one other element selected from the group consisting of:

Ga, Ge, Ag, Gd, Co, Pd, Sm, V, and Sn, balance Ni.

12. A magnetocaloric device in accordance with claim 11 wherein said at least one other element comprises 6 to 9 weight % Ga.

13. A magnetocaloric device in accordance with claim 11 wherein said at least one other element comprises 0.2 to 1 weight % Ge.

14. A magnetocaloric device in accordance with claim 11 wherein said at least one other element comprises 7 to 9 weight % Ag.

15. A magnetocaloric device in accordance with claim 11 wherein said at least one other element comprises 3 to 8 weight % Gd.

16. A magnetocaloric device in accordance with claim 11 wherein said at least one other element comprises 4 to 5 weight % Co.

17. A magnetocaloric device in accordance with claim 11 wherein said at least one other element comprises 7 to 9 weight % Pd.

18. A magnetocaloric device in accordance with claim 11 wherein said at least one other element comprises 6 to 9 weight % Sm.

19. A magnetocaloric device in accordance with claim 11 wherein said at least one other element comprises 2 to 3 weight % V.

20. A magnetocaloric device in accordance with claim 11 wherein said at least one other element comprises 10 to 12 weight % Sn.