EP0271657A2
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Fe-base soft magnetic alloy and method of producing same
Assignee: Proterial Ltd
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Filing: 1987-10-06
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Granted: —
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Expires: 2007-10-06
Abstract
Abstract An Fe-base soft magnetic alloy having the composition represented by the general formula: [Fe 1-a M a ] 100-x-y-z-α-β-γ Cu x Si y B z Mʹ α Mʺ β X γ wherein M is Co and/or Ni, Mʹ is at least one element selected from the group consisting of Nb, W, Ta, Zr, Hf, Ti and Mo, M" is at least one element selected from the group consisting of V, Cr, Mn, Aℓ, elements in the platinum group, Sc, Y, rare earth elements, Au, Zn, Sn and Re, X is at least one element selected from the group consisting of C, Ge, P, Ga, Sb, In, Be and As, and a, x, y, z, α, β and γ respectively satisfy 0≦a≦0.5, 0.1≦x≦3, 0≦y≦30, 0≦z≦25, 5≦y+z≦30, 0.1≦α≦30, β≦10 and γ≦10, at least 50% of the alloy structure being fine crystalline particles having an average particle size of 1000Å or less. This alloy has low core loss, time variation of core loss, high permeability and low magnetostriction.
Inventors
- 👤 Yoshihito Yoshizawa
- 👤 Kiyotaka Yamauchi
- 👤 Shigeru Oguma
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 17:36
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/54; C22C45/00; C22C45/02; C21; C21D; C21D1/00; C21D1/04; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/153; H01F1/15308
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
82 words
An Fe-base soft magnetic alloy having the composition represented by the general formula: [Fe 1-a M a ] 100-x-y-z-α Cu x Si y B z Mʹ α wherein M is Co and/or Ni, Mʹ is at least one element selected from the group consisting of Nb, W, Ta, Zr, Hf, Ti and Mo, and a, x, y, z and α respectively satisfy 0≦a≦0.5, 0.1≦x≦3, 0≦y≦30, 0≦z≦25, 5≦y+z≦30 and 0.1≦α≦30, at least 50% of the alloy structure being occupied by fine crystalline particles.
Claim 2
Dependent Claim
82 words
An Fe-base soft magnetic alloy having the composition represented by the general formula: [Fe 1-a M a ] 100-x-y-z-α Cu x Si y B z Mʹ α wherein M is Co and/or Ni, Mʹ is at least one element selected from the group consisting of Nb, W, Ta, Zr, Hf, Ti and Mo, and a, x, y, z and α respectively satisfy 0≦a≦0.5, 0.1≦x≦3, 0≦y≦30, 0≦z≦25, 5≦y+z≦30 and 0.1≦α≦30, at least 50% of the alloy structure being occupied by fine crystalline particles.
Claim 3
Dependent Claim
58 words
The Fe-base soft magnetic alloy according to claim 1, wherein said a, x, y, z and α respectively satisfy 0≦a≦0.1, 0.1≦x≦3, 6≦y≦25, 2≦z≦25, 14≦y+z≦30 and 0.1≦α≦10, and at least 50% of the alloy structure consists of fine crystalline particles having an average particle size of 1000Å or less when measured on their maximum sizes, thus having low magnetostriction.
Claim 4
Dependent Claim
26 words
The Fe-base soft magnetic alloy according to claim 1, wherein said a, x, y, z and α respectively satisfy 0≦a≦0.1, 0.5≦x≦2, 10≦y≦25, 3≦z≦18, 18≦y+z≦28 and 2≦α≦8.
Claim 5
Dependent Claim
30 words
The Fe-base soft magnetic alloy having a low magnetostriction according to claim 3, wherein said a, x, y, z and α respectively satisfy 0≦a≦0.05, 0.5≦x≦2, 11≦y≦24, 3≦z≦9, 18≦y+z≦27 and 2≦α≦8.
Claim 6
Dependent Claim
18 words
The Fe-base soft magnetic alloy having a low magnetostriction according to claim 3, wherein said Mʹ is Nb.
Claim 7
Dependent Claim
31 words
6 . The Fe-base soft magnetic alloy having a low magnetostriction according to claim 3, wherein said crystalline particles are mainly composed of an iron solid solution having a bcc structure.
Claim 8
Dependent Claim
24 words
7 . The Fe-base soft magnetic alloy having a low magnetostriction according to claim 3, having a saturation magnetostriction λs between -5×10⁻⁶ and +5×10⁻⁶.
Claim 9
Dependent Claim
23 words
The Fe-base soft magnetic alloy according to claim 7 , wherein said saturation magnetostriction λs is in the range of -1.5×10⁻⁶ - +1.5×10⁻⁶.
Claim 10
Dependent Claim
150 words
An Fe-base soft magnetic alloy having the composition represented by the general formula: [Fe 1-a M a ] 100-x-y-z-α-β-γ Cu x Si y B z E >Mʹ α Mʺ β X γ wherein M is Co and/or Ni, Mʹ is at least one element selected from the group consisting of Nb, W, Ta, Zr, Hf, Ti and Mo, Mʺ is at least one element selected from the group consisting of V, Cr, Mn, Aℓ, elements in the platinum group, Sc, Y, rare earth elements, Au, Zn, Sn and Re, X is at least one element selected from the group consisting of C, Ge, P, Ga, Sb, In, Be and As, and a, x, y, z, α, β and γ respectively satisfy 0≦a≦0.5, 0.1≦x≦3, 0≦y≦30, 0≦z≦25, 5≦y+z≦30, 0.1≦α≦30, β≦10 and γ≦10, at least 50% of the alloy structure being fine crystalline particles having an average particle size of 1000Å or less.
Claim 11
Dependent Claim
150 words
An Fe-base soft magnetic alloy having the composition represented by the general formula: [Fe 1-a M a ] 100-x-y-z-α-β-γ Cu x Si y B z E >Mʹ α Mʺ β X γ wherein M is Co and/or Ni, Mʹ is at least one element selected from the group consisting of Nb, W, Ta, Zr, Hf, Ti and Mo, Mʺ is at least one element selected from the group consisting of V, Cr, Mn, Aℓ, elements in the platinum group, Sc, Y, rare earth elements, Au, Zn, Sn and Re, X is at least one element selected from the group consisting of C, Ge, P, Ga, Sb, In, Be and As, and a, x, y, z, α, β and γ respectively satisfy 0≦a≦0.5, 0.1≦x≦3, 0≦y≦30, 0≦z≦25, 5≦y+z≦30, 0.1≦α≦30, β≦10 and γ≦10, at least 50% of the alloy structure being fine crystalline particles having an average particle size of 1000Å or less.
Claim 12
Dependent Claim
30 words
The Fe-base soft magnetic alloy according to claim 9 , wherein said a, x, y, z, α, β and γ respectively satisfy 0≦a≦0.1, 0.1≦x≦3, 6≦y≦25, 2≦z≦25, 14≦y+z≦30, 0.1≦α≦10, β≦5 γ≦5.
Claim 13
Dependent Claim
30 words
The Fe-base soft magnetic alloy according to claim 9, wherein said a, x, y, z, α, β and γ respectively satisfy 0≦a≦0.1, 0.5≦x≦2, 10≦y≦25, 3≦z≦18, 18≦y+z≦28, 2≦α≦8, β≦5 and γ≦5.
Claim 14
Dependent Claim
31 words
The Fe-base soft magnetic alloy according to claim 9 , wherein said a, x, y, z, α, β and γ respectively satisfy 0≦a≦0.05 0.5≦x≦2, 11≦y≦24 3≦z≦9, 18≦y+z≦27, 2≦α≦8, β≦5 and γ≦5.
Claim 15
Dependent Claim
24 words
The Fe-base soft magnetic alloy according to any of the claims 1 to 12, wherein the balance of said alloy structure is substantially amorphous.
Claim 16
Dependent Claim
23 words
The Fe-base soft magnetic alloy according to any of the claims 1 to 13,wherein said alloy structure substantially consists of fine crystalline particles.
Claim 17
Dependent Claim
28 words
The Fe-base soft magnetic alloy according to any of the claims 1 to 14, wherein said crystalline particles have an average particle size of 1000 Å or less.
Claim 18
Dependent Claim
21 words
The Fe-base soft magnetic alloy according to any of the claims 9 to 15, wherein said Mʹ is Nb and/or Mo.
Claim 19
Dependent Claim
22 words
The Fe-base soft magnetic alloy according to any of the claims 9 to 16, wherein y and z satisfy 5≦y+z≦10 when 10≦α≦30.
Claim 20
Dependent Claim
20 words
The Fe-base soft magnetic alloy according to any of the claims 9 to 16, wherein y and z satisfy 0≦z/y<1.
Claim 21
Dependent Claim
23 words
The Fe-base soft magnetic alloy according to any of the claims 9 to 18, wherein X is C and y+z+γ satisfy 15≦y+z+γ≦35 (γ=0).
Claim 22
Dependent Claim
34 words
The Fe-base soft magnetic alloy according to any of the claims 1 to 19, wherein said crystalline particles have an average particle size of 500Å or less, more preferably of 200 Å or less.
Claim 23
Dependent Claim
20 words
The Fe-base soft magnetic alloy according to claim 19, wherein said crystalline particles have an average particle size of 50-200Å.
Claim 24
Independent Claim
56 words
A method of producing an Fe-base soft magnetic alloy according to any of the claims 1 to 21; comprising the steps of [a] rapidly quenching a melt of the above composition to form an amorphous alloy; and [b] heat-treating said amorphous alloy to generate fine crystalline particles having an average particle size of 1000Å or less.
Claim 25
Dependent Claim
26 words
The method according to claim 22, wherein said heat treatment is carried out by heating said amorphous alloy at 450-700°C for 5 minutes to 24 hours.
Claim 26
Dependent Claim
19 words
The method according to claim 22 or 23, wherein said heat treatment is carried out in a magnetic field.
References Cited (Backward Citations)
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