US4881989A
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Fe-base soft magnetic alloy and method of producing same
Assignee: Proterial Ltd
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Filing: 1987-10-01
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Granted: 1989-11-21
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Expires: 2007-10-01
Abstract
Abstract An Fe-base soft magnetic alloy having the composition represented by the general formula: (Fe.sub.1-a M.sub.a).sub.100-x-y-z-α-β-γ Cu.sub.x Si.sub.y B z M' 60 M".sub.β X.sub.γ wherein M is Co and/or Ni, M' 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 1000 Å 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
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:42
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: 29
Claim 1
Independent Claim
84 words
An Fe-base soft magnetic alloy having the composition represented by the general formula: (Fe.sub.1-a M.sub.a).sub.100-x-y-z-α Cu.sub.x Si.sub.y B.sub.z M'.sub.α wherein M is Co and/or Ni, M' 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, 0.1≦z≦25, 5≦y+z≦30 and 0.1α≦30, at least 50% of the alloy structure being occupied by fine crystalline particles having an average particle size of 1000 Å or less.
Claim 2
Dependent Claim
84 words
An Fe-base soft magnetic alloy having the composition represented by the general formula: (Fe.sub.1-a M.sub.a).sub.100-x-y-z-α Cu.sub.x Si.sub.y B.sub.z M'.sub.α wherein M is Co and/or Ni, M' 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, 0.1≦z≦25, 5≦y+z≦30 and 0.1α≦30, at least 50% of the alloy structure being occupied by fine crystalline particles having an average particle size of 1000 Å or less.
Claim 3
Dependent Claim
19 words
The Fe-base soft magnetic alloy according to claim 1. wherein the balance of said alloy structure is substantially amorphous.
Claim 4
Dependent Claim
21 words
The Fe-base soft magnetic alloy according to claim 1, wherein said alloy structure is substantially composed of said fine crystalline particles.
Claim 5
Dependent Claim
30 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 having low magnetostriction.
Claim 6
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 7
Dependent Claim
30 words
The Fe-base soft magnetic alloy having a low magnetostriction according to claim 5, 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 8
Dependent Claim
18 words
The Fe-base soft magnetic alloy having a low magnetostriction according to claim 5, wherein said M' is Nb.
Claim 9
Dependent Claim
19 words
The Fe-base soft magnetic alloy according to claim 5, wherein the balance of said alloy structure is substantially amorphous.
Claim 10
Dependent Claim
23 words
The Fe-base soft magnetic alloy having a low magnetostriction according to claim 5, wherein said alloy structure substantially consists of fine crystalline particles.
Claim 11
Dependent Claim
24 words
The Fe-base soft magnetic alloy according to claim 1, wherein said fine crystalline particles have an average particle size of 500 Å or less.
Claim 12
Dependent Claim
24 words
The Fe-base soft magnetic alloy according to claim 10, wherein said fine crystalline particles have an average particle size of 200 Å or less.
Claim 13
Dependent Claim
25 words
The Fe-base soft magnetic alloy having a low magnetostriction according to claim 10, wherein said crystalline particles have an average particle size of 50-200 Å.
Claim 14
Dependent Claim
29 words
The Fe-base soft magnetic alloy having a low magnetostriction according to claim 5, wherein said crystalline particles ar mainly composed of an iron solid solution having a bcc structure.
Claim 15
Dependent Claim
25 words
The Fe-base soft magnetic alloy having a low magnetostriction according to claim 5, having a saturation magnetostriction λs between -5×10 -6 and +5×10 -6 .
Claim 16
Dependent Claim
24 words
The Fe-base soft magnetic alloy according to claim 14, wherein said saturation magnetostriction λs is in the range of -1.5×10 -6 -+1.5×10 -6 .
Claim 17
Dependent Claim
138 words
An Fe-base soft magnetic alloy having the composition represented by the general formula: (Fe.sub.1-a M.sub.a).sub.100-x-y-z-α-β-γ Cu.sub.x Si.sub.y B.sub.z M'.sub.αM".sub.β X.sub.γ wherein M is Co and/or Ni, M' 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≦z≦25, 5≦y+z≦30, 0.1≦α30, β≦10 and γ≦10, at least 50% of the alloy structure being fine crystalline particles having an average particle size of 1000 Å or less.
Claim 18
Dependent Claim
138 words
An Fe-base soft magnetic alloy having the composition represented by the general formula: (Fe.sub.1-a M.sub.a).sub.100-x-y-z-α-β-γ Cu.sub.x Si.sub.y B.sub.z M'.sub.αM".sub.β X.sub.γ wherein M is Co and/or Ni, M' 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≦z≦25, 5≦y+z≦30, 0.1≦α30, β≦10 and γ≦10, at least 50% of the alloy structure being fine crystalline particles having an average particle size of 1000 Å or less.
Claim 19
Dependent Claim
30 words
The Fe-base soft magnetic alloy according of claim 16, wherein said a, x, y, z, α, β and γ respectively satisfy 0≦a≦0.1, 0.1≦x≦3, 6≦y≦25, 2≦z25, 14≦y+z≦30, 0.1≦α≦10, β≦5 and γ≦5.
Claim 20
Dependent Claim
30 words
The Fe-base soft magnetic alloy according to claim 16, 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 21
Dependent Claim
30 words
The Fe-base soft magnetic alloy according to claim 16, 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 22
Dependent Claim
19 words
The Fe-base soft magnetic alloy according to claim 16, wherein the balance of said alloy structure is substantially amorphous.
Claim 23
Dependent Claim
19 words
The Fe-base soft magnetic alloy according to claim 16, wherein said alloy structure substantially consists of fine crystalline particles.
Claim 24
Dependent Claim
16 words
The Fe-base soft magnetic alloy according to claim 16, wherein said M' is Nb and/or Mo.
Claim 25
Dependent Claim
14 words
The Fe-base soft magnetic alloy according to claim 22, wherein said M' is Nb.
Claim 26
Dependent Claim
18 words
The Fe-base soft magnetic alloy according to claim 16, wherein said y and z satisfy 5≦y+z≦10 when 10≦α≦30.
Claim 27
Dependent Claim
23 words
The Fe-base soft magnetic alloy according to claim 16, wherein said crystalline particles have an average particle size of 500 Å or less.
Claim 28
Dependent Claim
23 words
The Fe-base soft magnetic alloy according to claim 16, wherein said crystalline particles have an average particle size of 200 Å or less.
Claim 29
Dependent Claim
21 words
The Fe-base soft magnetic alloy according to claim 16, wherein said crystalline particles have an average particle size of 50-200 Å.
References Cited (Backward Citations)
US4581080A
Cited
EP0125347A2
Cited
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