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A kind of cobalt-based amorphous alloy thin strip and its preparation method and use

A technology of amorphous alloy and thin strip, which is applied in the field of cobalt-based amorphous alloy thin strip and its preparation, can solve the problems of poor soft magnetic properties, achieve high magnetic flux density, significant GMI effect, and difficult crystallization

Active Publication Date: 2022-07-26
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the above problems of poor soft magnetic properties of materials in the prior art, the object of the present invention is to provide a cobalt-based amorphous alloy thin strip and its preparation method for solving the problems in the prior art

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  • A kind of cobalt-based amorphous alloy thin strip and its preparation method and use
  • A kind of cobalt-based amorphous alloy thin strip and its preparation method and use
  • A kind of cobalt-based amorphous alloy thin strip and its preparation method and use

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Embodiment 1

[0052] In this embodiment, the preparation chemical formula is Co 68 Fe 6.5 Si 12.5 B 10 Nb 2 Ni 1 The cobalt-based amorphous alloy thin strip includes the following steps:

[0053] 1) Co, B, Ni, FeB, FeSi, FeNb with a purity of not less than 99.99% are converted into Co according to the chemical formula 68 Fe 6.5 Si 12.5 B 10 Nb 2 Ni 1 For ingredients, a total of 50g.

[0054] 2) The obtained ingredients were mixed and put into a crucible of a vacuum induction melting furnace, and in an argon atmosphere, smelted at 1500° C. for 20 minutes, smelted 3 times, and then cast into an alloy ingot.

[0055] 3) The obtained alloy ingot is broken, and the broken alloy ingot is then put into absolute ethanol for ultrasonic cleaning 5min and taken out to dry; the dry bulk alloy ingot is put into a high-vacuum single-roller spin-quenching belt In the machine, the molten alloy ingot was sprayed onto a copper roll with a rotating linear speed of 30 m / s for cooling to obtain an a...

Embodiment 2

[0061] In this embodiment, the preparation chemical formula is Co 68 Fe 6.5 Si 12.5 B 10 Nb 1 Ni 2 The cobalt-based amorphous alloy thin strip includes the following steps:

[0062] 1) Co, B, Ni, FeB, FeSi, FeNb with a purity of not less than 99.99% are converted into Co according to the chemical formula 68 Fe 6.5 Si 12.5 B 10 Nb 1 Ni 2 For ingredients, a total of 50g.

[0063] 2) The obtained ingredients were mixed and put into a crucible of a vacuum induction melting furnace, and in an argon atmosphere, smelted at 1500° C. for 20 minutes, smelted 3 times, and then cast into an alloy ingot.

[0064] 3) The obtained alloy ingot is broken, and the broken alloy ingot is then put into absolute ethanol for ultrasonic cleaning 5min and taken out to dry; the dry bulk alloy ingot is put into a high-vacuum single-roller spin-quenching belt In the machine, the molten alloy ingot was sprayed onto a copper roll with a rotating linear speed of 20 m / s for cooling to obtain an a...

Embodiment 3

[0069] In this embodiment, the preparation chemical formula is Co 68 Fe 6.5 Si 12.5 B 10 Nb 0.5 Ni 2.5 The cobalt-based amorphous alloy thin strip includes the following steps:

[0070] 1) Co, B, Ni, FeB, FeSi, FeNb with a purity of not less than 99.99% are converted into Co according to the chemical formula 68 Fe 6.5 Si 12.5 B 10 Nb 0.5 Ni 2.5 For ingredients, a total of 50g.

[0071] 2) The obtained ingredients were mixed and put into a crucible of a vacuum induction melting furnace, and in an argon atmosphere, smelted at 1500° C. for 20 min, smelted 3 times, and then cast into an alloy ingot.

[0072] 3) The obtained alloy ingot is broken, and the broken alloy ingot is then put into absolute ethanol for ultrasonic cleaning 5min and taken out to dry; the dry bulk alloy ingot is put into a high-vacuum single-roller spin-quenching belt In the machine, the molten alloy ingot was sprayed onto a copper roll with a rotating linear speed of 30 m / s for cooling to obtain ...

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Abstract

The invention discloses a cobalt-based amorphous alloy thin strip and a preparation method and application thereof. A cobalt-based amorphous alloy ribbon is composed of the chemical formula Co 68 Fe 6.5 Si 12.5 B 10 Nb x Ni 3‑x The alloy is formed, where x=0.5~2.5. In the present invention, Ni and Nb elements are added to the traditional cobalt-based amorphous CoFeSiB, so that the soft magnetic properties of the amorphous alloy can be improved, and a more obvious skin effect can be obtained, thereby making the GMI effect more significant; Its mechanical properties have been improved, it can withstand greater tensile stress, and it can be better applied to GMI stress sensors.

Description

technical field [0001] The invention belongs to the technical field of magnetic materials, and in particular relates to a cobalt-based amorphous alloy thin strip and a preparation method and application thereof. Background technique [0002] The Giant Magneto-impedance (GMI) effect refers to the phenomenon that the AC impedance of the material changes significantly with the applied magnetic field. This phenomenon was first discovered in 1992 from cobalt-based amorphous wires. The GMI performance can be measured by the impedance change rate, that is, the GMI ratio. The formula is GMI ratio=(△z / z)=(z(H)-z(H) max )) / z(H max ), where z(H) is the AC impedance of the material under the magnetic field strength H, z(H) max ) is the AC impedance of the material when the magnetic field strength takes the maximum value. At present, the main scope of research on the GMI effect is not limited to amorphous wires, but also amorphous thin ribbons and films. It is generally believed that...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C45/04C22F1/10C21D9/52B22D11/06G01R33/06
CPCC22C45/04B22D11/0611C22F1/10C21D9/52G01R33/063
Inventor 陆伟帅商亮王韬磊向震陆顺达
Owner TONGJI UNIV
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