Fe-based amorphous alloy powder, dust core using the same, and coil-embedded dust core
First Claim
1. An Fe-based amorphous alloy powder having a composition represented by a formula:
- (Fe100-a-b-c-x-y-z-tNiaSnbCrcPxCyBzSit)100-α
Mα
, whereinan addition amount a of Ni satisfies 0 at %≦
a≦
10 at %,an addition amount b of Sn satisfies 0 at %≦
b≦
3 at %,an addition amount c of Cr satisfies 0 at %≦
c≦
6 at %,an addition amount x of P satisfies 6.8 at %≦
x≦
10.8 at %,an addition amount y of C satisfies 2.2 at %≦
y≦
9.8 at %,an addition amount z of B satisfies 0 at %≦
z≦
4.2 at %, andan addition amount t of Si satisfies 0 at %≦
t≦
3.9 at %,wherein a metal element M is at least one selected from the group consisting of Ti, Al, Mn, Zr, Hf, V, Nb, Ta, Mo, and W, and an addition amount a of the metal element M satisfies 0.04 wt %≦
α
≦
0.6 wt %,and wherein a concentration of the metal element M is higher in a powder surface layer than that inside the powder.
3 Assignments
0 Petitions
Accused Products
Abstract
An Fe-based amorphous alloy powder of the present invention has a composition represented by (Fe100-a-b-c-x-y-z-tNiaSnbCrcPxCyBzSit)100-αMα. In this composition, 0 at %≦a≦10 at %, 0 at %≦b≦3 at %, 0 at %≦c≦6 at %, 6.8 at %≦x≦10.8 at %, 2.2 at %≦y≦9.8 at %, 0 at %≦z≦4.2 at %, and 0 at %≦t≦3.9 at % hold, a metal element M is at least one selected from the group consisting of Ti, Al, Mn, Zr, Hf, V, Nb, Ta, Mo, and W, and the addition amount α of the metal element M satisfies 0.04 wt %≦α≦0.6 wt %. Accordingly, besides a decrease of a glass transition temperature (Tg), an excellent corrosion resistance and high magnetic characteristics can be obtained.
11 Citations
18 Claims
-
1. An Fe-based amorphous alloy powder having a composition represented by a formula:
- (Fe100-a-b-c-x-y-z-tNiaSnbCrcPxCyBzSit)100-α
Mα
, whereinan addition amount a of Ni satisfies 0 at %≦
a≦
10 at %,an addition amount b of Sn satisfies 0 at %≦
b≦
3 at %,an addition amount c of Cr satisfies 0 at %≦
c≦
6 at %,an addition amount x of P satisfies 6.8 at %≦
x≦
10.8 at %,an addition amount y of C satisfies 2.2 at %≦
y≦
9.8 at %,an addition amount z of B satisfies 0 at %≦
z≦
4.2 at %, andan addition amount t of Si satisfies 0 at %≦
t≦
3.9 at %,wherein a metal element M is at least one selected from the group consisting of Ti, Al, Mn, Zr, Hf, V, Nb, Ta, Mo, and W, and an addition amount a of the metal element M satisfies 0.04 wt %≦
α
≦
0.6 wt %,and wherein a concentration of the metal element M is higher in a powder surface layer than that inside the powder. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
- (Fe100-a-b-c-x-y-z-tNiaSnbCrcPxCyBzSit)100-α
Specification
-
- Resources
-
Current AssigneeAlps Alpine Co., Ltd.
-
Original AssigneeAlps Green Devices Co., Ltd. (Alps Alpine Co., Ltd.)
-
InventorsTsuchiya, Keiko, Okamoto, Jun, Koshiba, Hisato
-
Primary Examiner(s)Chan, Tsz
-
Application NumberUS13/942,579Publication NumberTime in Patent Office449 DaysField of Search336/83, 336/200, 336/233US Class Current336/233CPC Class CodesB22F 1/08 Metallic powder characteris...C22C 33/0257 characterised by the range ...C22C 38/00 Ferrous alloys, e.g. steel ...C22C 45/02 with iron as the major cons...H01F 1/15308 based on Fe/Ni H01F1/15325 ...H01F 2017/048 with encapsulating core, e....H01F 27/255 made from particles H01F27/...H01F 41/0246 Manufacturing of magnetic c...
