Highly Tunable, Inexpensive and Easily Fabricated Magnetocaloric Materials

Patent metadata

Field	Value
Publication number	US-2024068072-A1
Application number	US-202318500222-A
Country	US
Kind code	A1
Filing date	Nov 2, 2023
Priority date	Dec 28, 2017
Publication date	Feb 29, 2024
Grant date	—

Abstract

A method is provided of making a magnetocaloric alloy composition comprising Ni, Co, Mn, and Ti, which preferably includes certain beneficial substitutional elements, by melting the composition and rapidly solidifying the melted composition at a cooling rate of at least 100 K/second (Kelvin/second) to improve a magnetocaloric property of the composition. The rapidly solidified composition can be heat treated to homogenize the composition and annealed to tune the magneto-structural transition for use in a regenerator.

First claim

1 .- 7 . (canceled)

8 . A magnetocaloric alloy composition comprising Ni, Co Mn, and Ti wherein at least one of Fe, Cr, V, Sc, Zr, Nb, Mo, Zn, and Cu is substituted for a portion of at least one of Ni, Co, Mn, or Ti.

9 . The composition according to claim 8 represented by Ni 37.5 Co 12.5-x Fe x Mn 35 Ti 15 with 0<x<12.5.

10 . The composition according to claim 8 represented by Ni 37.5-x Fe x Co 12.5 Mn 35 Ti 15 with 0<x<37.5.

11 . The composition according to claim 8 represented by Ni 37.5-x Cu x Co 12.5 Mn 35 Ti 15 with 0<x<37.5.

12 . The composition according to claim 8 represented by Ni 37.5-x Zn x Co 12.5 Mn 35 Ti 15 with 0<x<37.5.

13 . The composition according to claim 8 represented by Ni 37.5 Co 12.5 Mn 35-x Fe x Ti 15 with 0<x<35.

14 . The composition according to claim 8 represented by Ni 37.5 Co 12.5 Mn 35-x Cr x Ti 15 with 0<x<35.

15 . The composition according to claim 8 represented by Ni 37.5 Co 12.5 Mn 35-x Mo x Ti 15 with 0<x<35.

16 . The composition according to claim 8 represented by Ni 37.5 Co 12.5 Mn 35 Ti 15-x V x with 0<x<15.

17 . The composition according to claim 8 represented by Ni 37.5 Co 12.5 Mn 35 Ti 15-x Zr x with 0<x<15.

18 . The composition according to claim 8 represented by Ni 37.5 Co 12.5 Mn 35 Ti 15-x Sc x with 0<x<15.

19 . The composition according to claim 8 represented by Ni 37.5 Co 12.5 Mn 35 Ti 15-x Nb x with 0<x<15.

20 .- 29 . (canceled)

30 . The composition of claim 8 that includes at least one of Fe, Cu, and Zn as a substitutional alloy element for a portion of Ni in an amount of greater than 0 to less than 37.5 atomic %.

31 . The composition of claim 8 that comprises Fe as a substitutional alloy element for a portion of Co in an amount greater than 0 to less than 12.5 atomic %.

32 . The composition of claim 8 that comprises at least one of Fe, Cr and Mo as a substitutional alloy element for a portion of Mn in an amount greater than 0 to less than 35 atomic %.

33 . The composition of claim 8 that comprises at least one of V, Zr, Sc, and Nb as a substitutional alloy element for Ti in an amount greater than 0 to less than 15 atomic %.

34 . The composition of claim 8 that comprises Ni in an amount greater than 0 to less than 37.5 atomic %, Co in an amount greater than 0 to less than 12.5 atomic %, Mn in an amount greater than 0 to less than 35 atomic %, Ti in an amount greater than 0 to less than 15 atomic %, and the at least one of Fe, Cr, V, Sc, Zr, Nb, Mo, Zn, and Cu in an amount greater than 0 atomic % to less than 5 atomic % to adjust magneto-structural transition temperature.

Assignees

• Univ Iowa State Res Found Inc

Inventors

• Bez Henrique Neves
• Biswas Anis
• Pathak Arjun K
• Mudryk Yaroslav
• Zarkevich Nikolai A
• Balema Viktor
• Pecharsky Vitalij K

Classifications

• C22C19/03

  based on nickel · CPC title

• C22C19/005

  with Manganese as the next major constituent · CPC title

• C22F1/10

  of nickel or cobalt or alloys based thereon · CPC title

• C22C1/023 Primary

  Alloys based on nickel · CPC title

• C21D8/1211

  Rapid solidification; Thin strip casting · CPC title