MULTICOMPONENT FECOSIM SOFT MAGNETIC ALLOY AND PREPARATION METHOD THEREOF

Abstract

A multicomponent FeCoSiM soft magnetic alloy is provided. M of the alloy is one or more of V, Cr and Ni. A sum of atomic percentages of alloy elements in the alloy is 100%. The atomic percents of the alloy elements meet the following conditions: Fe, 68˜78 at %; Co, 4˜12 at %; Si, 14˜18 at %; V, 0˜4 at %; Cr, 0˜4 at %; and Ni, 0˜4 at %. The preparation method of the alloy includes weighing raw materials according to the atomic percentages of the alloy elements and then performing melting and annealing heat treatment each in vacuum or a protective atmosphere. The alloy is obtained by a reasonable design of compositions and contents. A magnetocrystalline anisotropy constant of the alloy is low, a magnetostrictive coefficient of the alloy approaches zero and the alloy has characteristics of high saturation flux density and low coercivity.

Claims

1. (canceled)

2. A preparation method of a multicomponent FeCoSiM soft magnetic alloy, comprising: proportioning: selecting raw materials according to components of the multicomponent FeCoSiM soft magnetic alloy to obtain selected raw materials, cleaning the selected raw materials to obtain cleaned raw materials, and weighing the cleaned raw materials according to percentages of the components to obtain weighed raw materials, wherein the components of the multicomponent FeCoSiM soft magnetic alloy essentially consist of iron (Fe), cobalt (Co), silicon (Si) and a transition metal element M; melting: performing arc melting or induction melting to the weighed raw materials in vacuum or a protective atmosphere to obtain alloy ingots; and annealing: performing annealing heat treatment to the alloy ingots in vacuum or another protective atmosphere.

3. The preparation method of the multicomponent FeCoSiM soft magnetic alloy according to claim 2, wherein in the proportioning, each of the raw materials is a metal with a purity no less than 99.9% or a nonmetallic material with a purity no less than 99.9%.

4. The preparation method of the multicomponent FeCoSiM soft magnetic alloy according to claim 2, wherein the cleaning the selected raw materials comprises: placing the selected raw materials in absolute ethanol or acetone to remove oil stains and organic matters on surfaces of the selected raw materials by an ultrasonic cleaning.

5. The preparation method of the multicomponent FeCoSiM soft magnetic alloy according to claim 2, wherein in the melting, an air pressure of the vacuum is less than 5×10.sup.−3 pascals (Pa), and the protective atmosphere is an argon gas or a nitrogen gas with a purity no less than 99.9 volume percent (vol %).

6. The preparation method of the multicomponent FeCoSiM soft magnetic alloy according to claim 2, wherein in the melting, an electromagnetic stirring is used and each of the alloy ingots is melted repeatedly for 4˜6 times to reduce component segregation.

7. The preparation method of the multicomponent FeCoSiM soft magnetic alloy according to claim 2, wherein the annealing comprises: performing the annealing heat treatment to the alloy ingots at 700 Celsius degrees (° C.)˜900° C. for 1 hour (h)˜3 h and then cooling with a furnace.

8. The preparation method of the multicomponent FeCoSiM soft magnetic alloy according to claim 2, wherein in the annealing, an air pressure of the vacuum is less than 5×10.sup.−3 Pa and the protective atmosphere is a mixture gas of an argon gas or a nitrogen gas with a purity no less than 99.9 vol % and a hydrogen gas of 5˜10 vol %.

9. The preparation method of the multicomponent FeCoSiM soft magnetic alloy according to claim 2, wherein the transition metal element M is one or more selected from the group consisting of vanadium (V), chromium (Cr) and nickel (Ni).

10. The preparation method of the multicomponent FeCoSiM soft magnetic alloy according to claim 9, wherein the percentages of respective components of the multicomponent FeCoSiM soft magnetic alloy meet the following conditions: Fe, 68˜78 atomic percent (at %); Co, 4˜12 at %; Si, 14˜18 at %; V, 0˜4 at %; Cr, 0˜4 at %; and

Description

DETAILED DESCRIPTION OF THE EMBODIMENTS

Embodiment 1

[0014] A multicomponent FeCoSiM soft magnetic alloy is provided. Percentages of respective components of the multicomponent FeCoSiM soft magnetic alloy respectively are: Fe, 76 at %; Si, 15 at %; Co, 6 at %; and V, 3 at %. The preparation method of the multicomponent FeCoSiM soft magnetic alloy includes the following steps:

[0015] 1) proportioning: selecting Fe particles with a purity of 99.95%, Co particles with a purity of 99.95%, V particles with a purity of 99.95% and polycrystalline Si lumps with a purity of 99.999%, and weighing raw materials with a total amount of 60 grams (g) according to the above percentages of the respective components. Before the weighing the raw materials, putting the raw materials into the absolute ethanol for the ultrasonic cleaning for 5 minutes (min) and drying the raw materials after the ultrasonic cleaning.

[0016] 2) melting alloy: using a vacuum arc melting furnace, vacuumizing to the air pressure less than 5×10.sup.−3 Pa and then injecting 0.05 megapascals (MPa) high-purity argon as a protective atmosphere (also referred to as protective gas), and obtaining a soft magnetic alloy with uniform compositions by single melting for 3 min and repeated remelting for 6 times.

[0017] 3) annealing heat treatment: placing the soft magnetic alloy (also referred to as melted alloy) in a tubular furnace, injecting the high-purity argon as a protective atmosphere, and annealing at 900° C. for 1 h and then cooling with the tubular furnace.

[0018] A static hysteresis loop of the prepared alloy (the multicomponent FeCoSiM soft magnetic alloy) was measured. The saturation magnetization of the multicomponent FeCoSiM soft magnetic alloy is 171.0 emu per gram (emu/g) and the coercivity is 0.32 Oersted (Oe).

Embodiment 2

[0019] A multicomponent FeCoSiM soft magnetic alloy is provided. Percentages of respective components of the multicomponent FeCoSiM soft magnetic alloy respectively are: Fe, 68 at %; Si, 18 at %; Co, 10 at %; and Cr, 4 at %. The preparation method of the multicomponent FeCoSiM soft magnetic alloy includes the following steps:

[0020] 1) proportioning: selecting Fe particles with a purity of 99.95%, Co particles with a purity of 99.95%, Cr particles with a purity of 99.95% and polycrystalline Si lumps with a purity of 99.999%, and weighing raw materials with a total amount of 40 g according to the above percentages of the respective components. Before the weighing the raw materials, putting the raw materials into the absolute ethanol for the ultrasonic cleaning for 5 min and drying the raw materials after the ultrasonic cleaning.

[0021] 2) melting alloy: using a vacuum induction melting furnace, vacuumizing to the air pressure less than 5×10.sup.−3 Pa, and obtaining a soft magnetic alloy with uniform compositions by single melting for 5 min and repeated remelting for 4 times.

[0022] 3) annealing heat treatment: placing the soft magnetic alloy in a vacuum tubular furnace, vacuumizing to the air pressure less than 5×10.sup.−3 Pa, and annealing at 750° C. for 3 h and then cooling with the vacuum tubular furnace.

[0023] A static hysteresis loop of the multicomponent FeCoSiM soft magnetic alloy was measured. The saturation magnetization of the multicomponent FeCoSiM soft magnetic alloy is 163.5 emu/g and the coercivity is 0.25 Oe.

Embodiment 3

[0024] A multicomponent FeCoSiM soft magnetic alloy is provided. Percentages of respective components of the multicomponent FeCoSiM soft magnetic alloy respectively are: Fe, 78 at %; Si, 15 at %; Co, 4 at %; and Ni, 3 at %. The preparation method of the multicomponent FeCoSiM soft magnetic alloy includes the following steps:

[0025] 0.1) proportioning: selecting Fe particles with a purity of 99.95%, Co particles with a purity of 99.95%, Ni particles with a purity of 99.95% and polycrystalline Si lumps with a purity of 99.999%, and weighing raw materials with a total amount of 40 g according to the above percentages of the respective components. Before the weighing the raw materials, putting the raw materials into the absolute ethanol for the ultrasonic cleaning for 5 min and drying the raw materials after the ultrasonic cleaning.

[0026] 2) melting alloy: using a vacuum arc melting furnace, vacuumizing to the air pressure less than 5×10.sup.−3 Pa and then injecting 0.05 MPa high-purity nitrogen gas as a protective gas, using the electromagnetic stirring in the melting, and obtaining a soft magnetic alloy with uniform compositions by single melting for 4 min and repeated remelting for 6 times.

[0027] 3) annealing heat treatment: placing the soft magnetic alloy in a vacuum tubular furnace, vacuumizing to the air pressure less than 5×10.sup.−3 Pa, and annealing at 900° C. for 1 h and then cooling with the vacuum tubular furnace.

[0028] A static hysteresis loop of the multicomponent FeCoSiM soft magnetic alloy was measured. The saturation magnetization of the multicomponent FeCoSiM soft magnetic alloy is 175.0 emu/g and the coercivity is 0.30 Oe.

Embodiment 4

[0029] A multicomponent FeCoSiM soft magnetic alloy is provided. Percentages of respective components of the multicomponent FeCoSiM soft magnetic alloy respectively are: Fe, 74 at %; Si, 17 at %; Co, 6 at %; Ni, 2 at %; and Cr, 1 at %. The preparation method of the multicomponent FeCoSiM soft magnetic alloy includes the following steps:

[0030] 1) proportioning: selecting Fe particles with a purity of 99.95%, Co particles with a purity of 99.95%, Ni particles with a purity of 99.95%, Cr particles with a purity of 99.95% and polycrystalline Si lumps with a purity of 99.999%, and weighing raw materials with a total amount of 50 g according to the above percentages of the respective components. Before the weighing the raw materials, putting the raw materials into the absolute ethanol for the ultrasonic cleaning for 10 min and drying the raw materials after the ultrasonic cleaning.

[0031] 2) melting alloy: using a vacuum arc melting furnace, vacuumizing to the air pressure less than 5×10.sup.−3 Pa and then injecting 0.06 MPa high-purity argon gas as a protective gas, using the electromagnetic stirring in the melting, and obtaining a soft magnetic alloy with uniform compositions by single melting for 5 min and repeated remelting for 5 times.

[0032] 3) annealing heat treatment: placing the soft magnetic alloy in a vacuum tubular furnace, injecting high-purity argon gas as a protective gas, and annealing at 800° C. for 1.5 h and then cooling with the vacuum tubular furnace.

[0033] A static hysteresis loop of the multicomponent FeCoSiM soft magnetic alloy was measured. The saturation magnetization of the multicomponent FeCoSiM soft magnetic alloy is 166.5 emu/g and the coercivity is 0.35 Oe.

Embodiment 5

[0034] A multicomponent FeCoSiM soft magnetic alloy is provided. Percentages of respective components of the multicomponent FeCoSiM soft magnetic alloy respectively are: Fe, 76 at %; Si, 18 at %; Co, 4 at %; Ni, 4 at %; and V, 2 at %. The preparation method of the multicomponent FeCoSiM soft magnetic alloy includes the following steps:

[0035] 1) proportioning: selecting Fe particles with a purity of 99.95%, Co particles with a purity of 99.95%, Ni particles with a purity of 99.95%, V particles with a purity of 99.95% and polycrystalline Si lumps with a purity of 99.999%, and weighing raw materials with a total amount of 50 g according to the above percentages of the respective components. Before the weighing the raw materials, putting the raw materials into the absolute ethanol for the ultrasonic cleaning for 5 min and drying the raw materials after the ultrasonic cleaning.

[0036] 2) melting alloy: using a vacuum arc melting furnace, vacuumizing to the air pressure less than 5×10.sup.−3 Pa and then injecting 0.05 MPa high-purity argon gas as a protective gas, using the electromagnetic stirring in the melting, and obtaining a soft magnetic alloy with uniform compositions by single melting for 5 min and repeated remelting for 4 times.

[0037] 3) annealing heat treatment: placing the soft magnetic alloy in a vacuum tubular furnace, injecting a mixture gas of the argon gas and 10 vol % hydrogen gas as a protective gas, and annealing at 750° C. for 3 h and then cooling with the vacuum tubular furnace.

[0038] A static hysteresis loop of the multicomponent FeCoSiM soft magnetic alloy was measured. The saturation magnetization of the multicomponent FeCoSiM soft magnetic alloy is 168.0 emu/g and the coercivity is 0.28 Oe.

Embodiment 6

[0039] A multicomponent FeCoSiM soft magnetic alloy is provided. Percentages of respective components of the multicomponent FeCoSiM soft magnetic alloy respectively are: Fe, 73 at %; Si, 16 at %; Co, 6 at %; Cr, 3 at %; and V, 2 at %. The preparation method of the multicomponent FeCoSiM soft magnetic alloy includes the following steps:

[0040] 1) proportioning: selecting Fe particles with a purity of 99.95%, Co particles with a purity of 99.95%, Ni particles with a purity of 99.95%, V particles with a purity of 99.95% and polycrystalline Si lumps with a purity of 99.999%, and weighing raw materials with a total amount of 50 g according to the above percentages of the respective components. Before the weighing the raw materials, putting the raw materials into the absolute ethanol for the ultrasonic cleaning for 5 min and drying the raw materials after the ultrasonic cleaning.

[0041] 2) melting alloy: using a vacuum arc melting furnace, vacuumizing to the air pressure less than 5×10.sup.−3 Pa and then injecting 0.05 MPa high-purity argon gas as a protective gas, using the electromagnetic stirring in the melting, and obtaining a soft magnetic alloy with uniform compositions by single melting for 5 min and repeated remelting for 4 times.

[0042] 3) annealing heat treatment: placing the soft magnetic alloy in a vacuum tubular furnace, injecting high-purity argon gas as a protective gas, and annealing at 850° C. for 3 h and then cooling with the vacuum tubular furnace.

[0043] A static hysteresis loop of the multicomponent FeCoSiM soft magnetic alloy was measured. The saturation magnetization of the multicomponent FeCoSiM soft magnetic alloy is 168.0 emu/g and the coercivity is 0.36 Oe.