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US4188211A
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Thermally stable amorphous magnetic alloy
Assignee: TDK Corp
•
Filing: 1978-02-09
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Granted: 1980-02-12
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Expires: 1998-02-09
Abstract
Abstract During investigation of thermal stability of the amorphous magnetic alloys by the Inventors, it was discovered that, due to the application of heat to the alloys, the hysteresis loop of the conventional, amorphous magnetic alloys was shifted in such a manner that the initial permeability of the alloys was decreased. It was also discovered that the initial permeability of the conventional amorphous magnetic alloys was irreversibly changed due to the application of heat to and the withdrawal of heat from the alloys. The present invention is characterized by the discovery of an unexpected relationship between the content of metallic elements and a metalloid element(s) of the amorphous alloy composition, thereby providing novel alloy compositions with thermally stable magnetic properties. The present invention is also characterized by incorporating an additional element or elements into an amorphous magnetic alloy, thereby providing the alloy with thermal stability.
Inventors
- 👤 Norishige Yamaguchi
- 👤 Kazuo Ohya
- 👤 Osamu Kohmoto
- 👤 Hiroki Fujishima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:12
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/153; C; C22; C22C; C22C45/00; C22C45/04
Claims Analysis
Total Claims: 46
Claim 1
Independent Claim
109 words
An essentially amorphous, magnetic alloy having stable magnetic properties after heating to a temperature in the range of 100° to 200° C. said alloy having the general formula: (Fe.sub.a Co.sub.b Ni.sub.c).sub.x (Si.sub.e B.sub.f).sub.y, wherein, a, b and c are the molar fractions of iron, cobalt and nickel, respectively, wherein a+b+c=1.00; e and f are the molar fractions of silicon and boron, respectively, wherein e+f=1.00; x is the atomic percent of iron, cobalt and nickel; and y is an atomic percent of silicon and boron, based on the alloy, respectively, and, wherein a, c, e, f and y are defined by the following relationships: 0.03≦a≦0.12 0≦c≦0.60 27.5-8c≦y≦35-19c 0≦ey≦25, and 0≦fy≦30.
Claim 2
Dependent Claim
109 words
An essentially amorphous, magnetic alloy having stable magnetic properties after heating to a temperature in the range of 100° to 200° C. said alloy having the general formula: (Fe.sub.a Co.sub.b Ni.sub.c).sub.x (Si.sub.e B.sub.f).sub.y, wherein, a, b and c are the molar fractions of iron, cobalt and nickel, respectively, wherein a+b+c=1.00; e and f are the molar fractions of silicon and boron, respectively, wherein e+f=1.00; x is the atomic percent of iron, cobalt and nickel; and y is an atomic percent of silicon and boron, based on the alloy, respectively, and, wherein a, c, e, f and y are defined by the following relationships: 0.03≦a≦0.12 0≦c≦0.60 27.5-8c≦y≦35-19c 0≦ey≦25, and 0≦fy≦30.
Claim 3
Dependent Claim
24 words
An alloy according to claim 1, wherein said values a, c, e and y are defined by the following relationships: 0.04≦a≦0.09 0≦c≦0.30, and 5≦ey≦20.
Claim 4
Dependent Claim
120 words
An essentially amorphous, magnetic alloy having stable magnetic properties after heating to a temperature in the range of 100° to 200° C. said alloy having the general formula: (Fe.sub.a Co.sub.b Ni.sub.c).sub.x (Si.sub.e B.sub.f P.sub.g C.sub.h).sub.y, wherein, a, b and c are the molar fractions of iron, cobalt and nickel, respectively, wherein a+b+c=1.00; e, f, g and h are the molar fractions of silicon, boron, phosphorous and carbon, respectively, wherein e+f+g+h=1.00; x is the atomic % of iron, cobalt and nickel; and y is the atomic % of silicon, boron, phosphorous and carbon based on the alloy, respectively and, a, c, e, f, g and h and y are defined by the following relationships: 0.03≦a≦0.12; 0≦c≦0.60; 27.5-8c≦y≦35-19c; 0≦ey≦25; 0≦fy≦30, and; 0<(g+h)<0.8(e+f).
Claim 5
Dependent Claim
120 words
An essentially amorphous, magnetic alloy having stable magnetic properties after heating to a temperature in the range of 100° to 200° C. said alloy having the general formula: (Fe.sub.a Co.sub.b Ni.sub.c).sub.x (Si.sub.e B.sub.f P.sub.g C.sub.h).sub.y, wherein, a, b and c are the molar fractions of iron, cobalt and nickel, respectively, wherein a+b+c=1.00; e, f, g and h are the molar fractions of silicon, boron, phosphorous and carbon, respectively, wherein e+f+g+h=1.00; x is the atomic % of iron, cobalt and nickel; and y is the atomic % of silicon, boron, phosphorous and carbon based on the alloy, respectively and, a, c, e, f, g and h and y are defined by the following relationships: 0.03≦a≦0.12; 0≦c≦0.60; 27.5-8c≦y≦35-19c; 0≦ey≦25; 0≦fy≦30, and; 0<(g+h)<0.8(e+f).
Claim 6
Dependent Claim
25 words
An alloy according to claim 3, wherein a, c, e, y, g and h are defined by the following relationships: 0.04≦a≦0.09 0≦c≦0.30 5≦ey≦20, and 0<(g+H)<0.5(e+f).
Claim 7
Dependent Claim
196 words
An essentially amorphous magnetic alloy having stable magnetic properties after heating to a temperature in the range of 100° to 200° C. and which has a reduced irreversible dependence of the initial permeability over a temperature range of -40° C. to 120° C., said alloy having the general formula: (Fe.sub.a Co.sub.b Ni.sub.c).sub.x (Si.sub.e B.sub.f).sub.y, wherein, a, b and c are the molar fractions of iron, cobalt and nickel, respectively, wherein a+b+c=1.00; e and f are the molar fractions of silicon and boron, respectively, wherein e+f=1.00; x is the atomic % of iron cobalt and nickel and y is the atomic % of silicon and boron, respectively, based on the composition expressed by said general formula, and, further, said values a, b, e, f and y are defined by the following relationships: 0.03≦a≦0.12; 0.40≦b≦0.85; 20≦y≦35; 0≦ye≦25, and; 0<fy≦30; and, wherein at least one element selected from the group consisting of Ti, Zr, V, Nb, Ta, Cr, Mo, W, Zn, Al, Ga, In, Ge, Sn, Pb, As, Sb and Bi in an amount from 0.5 to 6.0 atomic % based on the total components of the amorphous alloy is present in said alloy expressed by said general formula.
Claim 8
Dependent Claim
196 words
An essentially amorphous magnetic alloy having stable magnetic properties after heating to a temperature in the range of 100° to 200° C. and which has a reduced irreversible dependence of the initial permeability over a temperature range of -40° C. to 120° C., said alloy having the general formula: (Fe.sub.a Co.sub.b Ni.sub.c).sub.x (Si.sub.e B.sub.f).sub.y, wherein, a, b and c are the molar fractions of iron, cobalt and nickel, respectively, wherein a+b+c=1.00; e and f are the molar fractions of silicon and boron, respectively, wherein e+f=1.00; x is the atomic % of iron cobalt and nickel and y is the atomic % of silicon and boron, respectively, based on the composition expressed by said general formula, and, further, said values a, b, e, f and y are defined by the following relationships: 0.03≦a≦0.12; 0.40≦b≦0.85; 20≦y≦35; 0≦ye≦25, and; 0<fy≦30; and, wherein at least one element selected from the group consisting of Ti, Zr, V, Nb, Ta, Cr, Mo, W, Zn, Al, Ga, In, Ge, Sn, Pb, As, Sb and Bi in an amount from 0.5 to 6.0 atomic % based on the total components of the amorphous alloy is present in said alloy expressed by said general formula.
Claim 9
Dependent Claim
40 words
An alloy according to claim 5, wherein said values a, b, e and y are defined by the following relationships: 0.04≦a≦0.09 0.40≦b≦0.70, and 5≦ey≦20, and the content of said at least one element is from 0.5 to 3.0 atomic %.
Claim 10
Dependent Claim
200 words
An essentially amorphous, magnetic alloy having stable magnetic properties after heating to a temperature in the range of 100° to 200° C. and which has a reduced irreversible dependence of the initial permeability over a temperature range of -40° C. to 120° C. said alloy having the general formula: (Fe.sub.a Co.sub.b Ni.sub.c).sub.x (Si.sub.e B.sub.f P.sub.g C.sub.h).sub.y, wherein, a, b and c are the molar fractions of iron, cobalt and nickel, respectively, wherein a+b+c=1.00; e, f, g and h are the molar fractions of silicon, boron, phosphorous and carbon, respectively, wherein e+f+g+h=1.00; x is the atomic % of iron, cobalt and nickel; and y is the atomic % of silicon, boron, phosphorous and carbon based on the alloy respectively, and said values a, c, e, f, g, h and y are defined by the following relationships: 0.03≦a≦0.12; 0.40≦b≦0.85; 0≦ey≦25; 0≦fy≦30, and; 0<(g+h)≦0.8(e+f), and, wherein at least one element selected from the group consisting of Ti, Zr, V, Nb, Ta, Cr, Mo, W, Zn, Al, Ga, In, Ge, Sn, Pb, As, Sb and Bi in an amount from 0.5 to 6.0 atomic % based on the total components of the amorphous alloy is present in said alloy expressed by said general formula.
Claim 11
Dependent Claim
200 words
An essentially amorphous, magnetic alloy having stable magnetic properties after heating to a temperature in the range of 100° to 200° C. and which has a reduced irreversible dependence of the initial permeability over a temperature range of -40° C. to 120° C. said alloy having the general formula: (Fe.sub.a Co.sub.b Ni.sub.c).sub.x (Si.sub.e B.sub.f P.sub.g C.sub.h).sub.y, wherein, a, b and c are the molar fractions of iron, cobalt and nickel, respectively, wherein a+b+c=1.00; e, f, g and h are the molar fractions of silicon, boron, phosphorous and carbon, respectively, wherein e+f+g+h=1.00; x is the atomic % of iron, cobalt and nickel; and y is the atomic % of silicon, boron, phosphorous and carbon based on the alloy respectively, and said values a, c, e, f, g, h and y are defined by the following relationships: 0.03≦a≦0.12; 0.40≦b≦0.85; 0≦ey≦25; 0≦fy≦30, and; 0<(g+h)≦0.8(e+f), and, wherein at least one element selected from the group consisting of Ti, Zr, V, Nb, Ta, Cr, Mo, W, Zn, Al, Ga, In, Ge, Sn, Pb, As, Sb and Bi in an amount from 0.5 to 6.0 atomic % based on the total components of the amorphous alloy is present in said alloy expressed by said general formula.
Claim 12
Dependent Claim
42 words
An alloy according to claim 7, wherein said values a, b, e, y, g and h are defined by the following relationships: 0.04≦a≦0.09 0.40≦b≦0.70 5≦ey≦20 0<(g+h)≦0.50(e+f), and the content of said at least one element is form 0.5 to 3.0 atomic %.
Claim 13
Dependent Claim
25 words
Alloys of claim 1 of the formula (Fe.sub.0.07-0.08 Co.sub.0.62-0.63 Ni.sub.0.30).sub.71-73 (Si.sub.e B.sub.f).sub.27-29 wherein e and f are the molar fractions of Si and B, respectively.
Claim 14
Dependent Claim
25 words
Alloys of claim 1 of the formula (Fe.sub.0.09-0.10 Co.sub.0.30-0.46 Ni.sub.0.45-0.60).sub.76-74 (Si.sub.e B.sub.f).sub.24-26 wherein e and f are the molar fractions of Si and B, respectively.
Claim 15
Dependent Claim
12 words
An alloy of claim 1 of the formula (Fe.sub.0.05 Co.sub.0.95).sub.72.5 Si.sub.16.5 B.sub.11
Claim 16
Dependent Claim
12 words
An alloy of claim 1 of the formula (Fe.sub.0.04 Co.sub.0.96).sub.69 Si.sub.18 B.sub.13
Claim 17
Dependent Claim
12 words
An alloy of claim 1 of the formula (Fe.sub.0.03 Co.sub.0.97).sub.65 Si.sub.21 B.sub.14
Claim 18
Dependent Claim
13 words
An alloy of claim 1 of the formula (Fe.sub.0.07 Co.sub.0.73 Ni.sub.0.20).sub.74 Si.sub.16 B.sub.10
Claim 19
Dependent Claim
13 words
An alloy of claim 1 of the formula (Fe.sub.0.05 Co.sub.0.75 Ni.sub.0.20).sub.69 Si.sub.18 B.sub.13
Claim 20
Dependent Claim
13 words
An alloy of claim 1 of the formula (Fe.sub.0.08 Co.sub.0.62 Ni.sub.0.30).sub.73 Si.sub.16 B.sub.11
Claim 21
Dependent Claim
13 words
An alloy of claim 1 of the formula (Fe.sub.0.07 Co.sub.0.63 Ni.sub.0.30).sub.71 Si.sub.17 B.sub.12
Claim 22
Dependent Claim
13 words
An alloy of claim 1 of the formula (Fe.sub.0.10 Co.sub.0.45 Ni.sub.0.45).sub.76 Si.sub.15 B.sub.9
Claim 23
Dependent Claim
13 words
An alloy of claim 1 of the formula (Fe.sub.0.09 Co.sub.0.40 Ni.sub.0.45).sub.74 Si.sub.16 B.sub.10
Claim 24
Dependent Claim
13 words
An alloy of claim 1 of the formula (Fe.sub.0.11 Co.sub.0.20 Ni.sub.0.60).sub.77.3 Si.sub.13.7 B.sub.9
Claim 25
Dependent Claim
13 words
An alloy of claim 1 of the formula (Fe.sub.0.10 Co.sub.0.30 Ni.sub.0.60).sub.76.4 Si.sub.13.6 B.sub.10
Claim 26
Dependent Claim
14 words
An alloy of claim 3 of the formula (Fe.sub.0.08 Co.sub.0.62 Ni.sub.0.30).sub.73 Si.sub.10 B.sub.11 P.sub.6
Claim 27
Dependent Claim
14 words
An alloy of claim 3 of the formula (Fe.sub.0.08 Co.sub.0.62 Ni.sub.0.30).sub.73 Si.sub.10 B.sub.11 C.sub.6
Claim 28
Dependent Claim
15 words
An alloy of claim 3 of the formula (Fe.sub.0.08 Co.sub.0.62 Ni.sub.0.30).sub.73 Si.sub.10 B.sub.5 P.sub.6 C.sub.6
Claim 29
Dependent Claim
12 words
An alloy of claim 1 of the formula (Fe.sub.0.08 Co.sub.0.62 Ni.sub.0.30).sub.73 B.sub.27
Claim 30
Dependent Claim
13 words
An alloy of claim 1 of the formula (Fe.sub.0.08 Co.sub.0.62 Ni.sub.0.30).sub.73 Si.sub.7 B.sub.20
Claim 31
Dependent Claim
13 words
An alloy of claim 1 of the formula (Fe.sub.0.08 Co.sub.0.62 Ni.sub.0.30).sub.73 Si.sub.17 B.sub.16
Claim 32
Dependent Claim
13 words
An alloy of claim 1 of the formula (Fe.sub.0.03 Co.sub.0.62 Ni.sub.0.30).sub.73 Si.sub.20 B.sub.7
Claim 33
Dependent Claim
13 words
Alloys of claim 5 of the formula (Fe.sub.0.07 Co.sub.0.85 Ni.sub.0.08).sub.75 Si.sub.15 B.sub.10 Mo.sub.5-8
Claim 34
Dependent Claim
13 words
Alloys of claim 5 of the formula (Fe.sub.0.08 Co.sub.0.75 Ni.sub.0.17).sub.75 Si.sub.15 B.sub.10 Mo.sub.5-8
Claim 35
Dependent Claim
13 words
Alloys of claim 5 of the formula (Fe.sub.0.09 Co.sub.0.75 Ni.sub.0.26).sub.75 Si.sub.15 B.sub.10 Mo.sub.5-8
Claim 36
Dependent Claim
13 words
Alloys of claim 5 of the formula (Fe.sub.0.11 Co.sub.0.40 Ni.sub.0.49).sub.75 Si.sub.15 B.sub.10 Mo.sub.1-3
Claim 37
Dependent Claim
13 words
Alloys of claim 5 of the formula (Fe.sub.0.12 Co.sub.0.65 Ni.sub.0.23).sub.80 Si.sub.12 B.sub.8 Mo.sub.5-8
Claim 38
Dependent Claim
14 words
An alloy of claim 5 of the formula (Fe.sub.0.04 Co.sub.0.65 Ni.sub.0.31).sub.65 Si.sub.21 B.sub.14 Mo.sub.1
Claim 39
Dependent Claim
41 words
Alloys of claim 5 of the formula (Fe.sub.0.09 Co.sub.0.65 Ni.sub.0.26).sub.75 Si.sub.15 B.sub.10 Z.sub.5 wherein Z is an element selected from the group consisting of Ti, Zr, V, Nb, Ta, Cr, W, Zn, Al, Ga, In, Sn, Pb, As, Sb and Bi.
Claim 40
Dependent Claim
32 words
Alloys of claim 5 of the formula (Fe.sub.0.09 Co.sub.0.65 Ni.sub.0.26).sub.75 Si.sub.15 B.sub.10 X.sub.5 wherein X is a combination of elements selected from the group consisting of (Ti+Mo), (Ta+Al), (Nb+Ge), (W+Sb) and (Cr'Sn).
Claim 41
Dependent Claim
13 words
An alloy of claim 5 of the formula (Fe.sub.0.09 C.sub.0.65 Ni.sub.0.26).sub.75 B.sub.25 Mo.sub.5
Claim 42
Dependent Claim
14 words
An alloy of claim 5 of the formula (Fe.sub.0.09 Co.sub.0.65 Ni.sub.0.26).sub.75 Si.sub.5 B.sub.20 Mo.sub.5
Claim 43
Dependent Claim
14 words
An alloy of claim 5 of the formula (Fe.sub.0.09 Co.sub.0.65 Ni.sub.0.26).sub.75 Si.sub.10 B.sub.15 Mo.sub.5
Claim 44
Dependent Claim
14 words
An alloy of claim 5 of the formula (Fe.sub.0.09 Co.sub.0.65 Ni.sub.0.26).sub.75 Si.sub.20 B.sub.5 Mo.sub.5
Claim 45
Dependent Claim
15 words
An alloy of claim 7 of the formula (Fe.sub.0.09 Co.sub.0.65 Ni.sub.0.26).sub.75 Si.sub.8 B.sub.10 P.sub.5 Mo.sub.5
Claim 46
Dependent Claim
16 words
An alloy of claim 7 of the formula (Fe.sub.0.09 Co.sub.0.65 Ni.sub.0.26).sub.75 Si.sub.8 B.sub.5 P.sub.7 C.sub.5 Mo.sub.5
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| 3.5 Years (Year 4) | 1983-02-11 | 1983-08-13 | 1984-02-12 | $2000.00 | Window Closed / Lapsed |
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