Amorphous magnetic alloy

• US 4,385,932 A
• Filed: 06/04/1981
• Issued: 05/31/1983
• Est. Priority Date: 06/24/1980
• Status: Expired due to Term

• Current Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
• Original Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
• Inventors: Inomata, Koichiro, Hasegawa, Michio, Shimanuki, Senji, Haga, Masakatsu
• Primary Examiner(s): Sheehan, John P.
• Application Number:
  US06/270,568
• Time in Patent Office: 726 Days
• Field of Search: 75/123 B, 75/123 H, 75/123 N, 75/123 J, 75/123 L, 75/123 M, 75/126 B, 75/126 C, 75/126 D, 75/126 E, 75/126 F, 75/126 P , 75/126 Q, 75/128 A, 75/128 C, 75/128 F, 75/128 G, 75/128 Z, 75/128 T, 75/128 W, 75/128 V, 75/134 F, 75/134 V, 75/134 M , 75/134 S, 75/134 P, 75/170, 75/171
• US Class Current: 148/304
• CPC Class Codes: C22C 45/02 with iron as the major constituent
• CPC Class Codes: H01F 1/15308 based on Fe/Ni H01F1/15325 takes precedence

Abstract

An amorphous magnetic alloy has a general formula:

(Fe.sub.1-a.Ni.sub.a).sub.100-x-y.Si.sub.x.B.sub.y

where

0.2≦a≦0.7

1≦x≦20

5≦y≦9.5

15≦x+y≦29.5

The alloy is low in iron loss and suitable for forming a magnetic core used under a high frequency.

Claims

1. An amorphous magnetic alloy low in iron loss having a general formula:

space="preserve" listing-type="equation">(Fe.sub.1-a.Ni.sub.a).sub.100-x-y.Si.sub.x.B.sub.y

where,

0.2≦

a≦

0.7

1≦

x≦

20

5≦

y≦

9.5

10.5≦

x+y≦

29.5.

2. The amorphous magnetic alloy according to claim 1, wherein the boron content meets the condition of:

6≦

y≦

8.

3. The amorphous magnetic alloy according to claim 1, wherein the nickel content meets the condition of:

0.3≦

a≦

0.45.

4. The amorphous magnetic alloy according to claim 1, wherein Fe is partly replaced by at least one element selected from the group consisting of Ti, V, Cr, Mn, Co, Zr, Nb, Mo, Ta and W in an amount of 1 to 10 atomic % based on the sum of transition metals in the alloy.