# US 11,114,224 B2 · Magnet material, permanent magnet, motor, and power generator

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,114,224 B2
- Document ID: US11114224B2
- Status: Granted
- Kind: B2
- Application number: 16/354,298
- Filed: 2019-03-15
- Published: 2019-07-11
- Granted: 2021-09-07
- Earliest claimed: 2013-11-07
- Assignees: Kabushiki Kaisha Toshiba
- Applicants: Kabushiki Kaisha Toshiba
- Inventors: Masaki Endo; Yasutaka Nishida; Shinya Sakurada; Keiko Okamoto; Fumihiko Aiga
- Web page: https://patentgrep.com/patent/US11114224B2

## CPC

- H01F 1/047: Alloys characterised by their composition
- C22C 33/04: by melting
- C22C 33/06: using master alloys
- C22C 38/001: {containing N}
- C22C 38/002: {containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60}
- C22C 38/02: containing silicon
- C22C 38/04: containing manganese
- C22C 38/06: containing aluminium
- C22C 38/10: containing cobalt
- C22C 38/12: containing tungsten, tantalum, molybdenum, vanadium, or niobium
- C22C 38/24: with vanadium
- C22C 38/30: with cobalt
- C22C 38/32: with boron
- C22C 38/38: with more than 1.5% by weight of manganese
- H01F 1/08: pressed, sintered, or bound together
- H01F 7/02: Permanent magnets {[PM]}
- H01F 7/021: {Construction of PM (H01F7/0278 takes precedence; PM compositions H01F1/032)}
- H02K 1/02: characterised by the magnetic material
- H02K 1/27: Rotor cores with permanent magnets
- B22F 2998/10: Processes characterised by the sequence of their steps
- C22C 33/0278: {with at least one alloying element having a minimum content above 5%}
- C22C 2202/02: Magnetic
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})
- B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER

## Abstract

A magnet material of an embodiment includes a composition represented by a formula 1: (Fe1-x-yCoxTy)2(B1-aAa)b, and a metallic structure having a CuAl2 crystal phase as a main phase. T is at least one element selected from V, Cr, and Mn. A is at least one element selected from C, N, Si, S, P, and Al. An atomic ratio x of Co and an atomic ratio y of the element T satisfy 0.01≤y≤0.5 and x+y≤0.5. When the element T includes at least one element selected from V and Cr, a total atomic ratio of V and Cr is 0.03 or more. When the element T includes Mn, an atomic ratio of Mn is 0.3 or less. An atomic ratio a of the element A satisfies 0≤a≤0.4. A total atomic ratio b of B and the element A satisfies 0.8≤b≤1.2.

## Claims

### Claim 1

A magnet material, comprising:
a composition represented by a composition formula 1:
(Fe1-x-yCoxMny)2(B1-aAa)b
where A is at least one element selected from the group consisting of C, N, Si, S, P, and Al, an atomic ratio x of Co and an atomic ratio y of Mn satisfy 0.1≤x≤0.4, 0.01≤y≤0.3, and x+y≤0.5, an atomic ratio a of the element A satisfies 0≤a0.4≤0.4, and a total atomic ratio b of B and the element A satisfies 0.8≤b≤1.2; and
a metallic structure having a CuAl2 crystal phase as a main phase.

### Claim 2 (depends on 1)

The magnet material of claim 1, wherein the atomic ratio y of Mn satisfies 0.05≤y≤0.3.

### Claim 3 (depends on 1)

The magnet material of claim 1, wherein a coercive force of the magnet material is 10.5 kA/m or more.

### Claim 4 (depends on 1)

The magnet material of claim 1, wherein a coercive force of the magnet material is 10.5 kA/m or more and 34.2 kA/m or less.

### Claim 5 (depends on 1)

The magnet material of claim 1, wherein a saturation magnetization of the magnet material is 1.24 T or more.

### Claim 6 (depends on 1)

The magnet material of claim 1, wherein a saturation magnetization of the magnet material is 1.24 T or more and 1.38 T or less.

### Claim 7 (depends on 1)

A permanent magnet, comprising the magnet material of claim 1.

### Claim 8 (depends on 7)

A motor, comprising the permanent magnet of claim 7.

### Claim 9 (depends on 7)

A power generator, comprising the permanent magnet of claim 7.

### Claim 10

A magnet material, comprising:
a composition represented by a composition formula 2:
(Fe1-x-y-zCoxMnyTz)2(B1-aAa)b
where T is at least one element selected from the group consisting of V and Cr, A is at least one element selected from the group consisting of C, N, Si, S, P, and Al, an atomic ratio x of Co, an atomic ratio y of Mn and an atomic ratio z of the element T satisfy 0.1≤x≤0.4, 0.01≤y≤0.3, 0≤z≤0.4, and x+y+z≤0.5, an atomic ratio a of the element A satisfies 0≤a≤0.4, and a total atomic ratio b of B and the element A satisfies 0.8≤b≤1.2; and
a metallic structure having a CuAl2 crystal phase as a main phase.

### Claim 11 (depends on 10)

A permanent magnet, comprising the magnet material of claim 10.

### Claim 12 (depends on 11)

A motor, comprising the permanent magnet of claim 11.

### Claim 13 (depends on 11)

A power generator, comprising the permanent magnet of claim 11.