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Cobalt base amorphous alloy wire and preparation method thereof

An amorphous alloy, cobalt-based technology, applied in the field of cobalt-based amorphous alloy wire and its preparation, can solve problems such as no substantial breakthrough, and achieve excellent mechanical properties and soft magnetic properties, high giant magneto-impedance change rate and Magnetic field sensitivity and excellent mechanical properties

Active Publication Date: 2010-05-19
NINGBO INNOVATION CENT FOR APPLIED MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

my country has also been carrying out related research, but so far no substantial breakthroughs have been made

Method used

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  • Cobalt base amorphous alloy wire and preparation method thereof
  • Cobalt base amorphous alloy wire and preparation method thereof
  • Cobalt base amorphous alloy wire and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The molecular formula of the cobalt-based amorphous alloy wire of this example is Co 64.8 Fe 7.2 Si 4.8 B 19.2 Nb 4 , the preparation steps are as follows: prepare 20 g of raw materials Co, Fe, B, Si and Nb with a purity greater than 99% according to the composition of the cobalt-based amorphous alloy wire of this embodiment, and then use a high-frequency induction melting furnace to melt under the protection of argon , the melting current is 6.5A, and the melting time is 12 minutes;

[0028] Break the smelted alloy ingot into small pieces of about 2g, put it into a glass test tube, connect the glass test tube to the vacuum system, repeatedly vacuumize 2 to 3 times, and then fill the glass test tube with argon gas at 1 atmosphere. And adjust the height of the cooling water so that it is 5-15 mm away from the bottom of the test tube, and at the same time adjust the appropriate current to melt the alloy. When the glass in contact with the molten alloy softens, pull ou...

Embodiment 2

[0032] The molecular formula of the cobalt-based amorphous alloy wire of this example is Co 63.1 Fe 3.9 Si 5.6 B 22.4 Nb 5 . The preparation steps are as follows: prepare 20 g of raw materials Co, Fe, B, Si and Nb with a purity greater than 99% according to the composition of the cobalt-based amorphous alloy wire in this embodiment, and then use a high-frequency induction melting furnace to melt under the protection of argon. The melting current is 7.0A, and the melting time is 10 minutes;

[0033] Break the smelted alloy ingot into small pieces of about 2g, put it into a glass test tube, connect the glass test tube to the vacuum system, repeatedly vacuumize 2 to 3 times, and then fill the glass test tube with argon gas at 1 atmosphere. And adjust the height of the cooling water so that it is 5-15mm away from the bottom of the test tube. At the same time, adjust the appropriate current to melt the alloy. When the glass in contact with the molten alloy softens, pull out a ...

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Abstract

The invention discloses a cobalt base amorphous alloy wire and a preparation method thereof. The molecular formula of the alloy is CoaFebBcSidNbe, wherein a is 60-70 percent, b is 2-10 percent, c is 15-25 percent, d is 3-6 percent, e is 2-6 percent and the summation of a, b, c, d and e is 100 percent. A glass coated spinning method is adopted for preparation method, and a prepared cobalt base amorphous alloy wire material has excellent soft magnetic property and mechanical property and higher colossal magneto resistive change rate and magnetic sensitivity ratio. The invention can greatly improve the colossal magneto resistive change rate and the magnetic sensitivity ratio of the cobalt base amorphous alloy wire, and the properties of the product are superior to that of like products in China at present, thus the cobalt base amorphous alloy wire can be widely applied to the fields of AC sensor technologies and magnetic-sensing sensor technologies.

Description

technical field [0001] The invention relates to a cobalt-based amorphous alloy wire and a preparation method thereof, and belongs to the technical field of magnetic sensitive sensors, magnetic materials and preparation thereof. Background technique [0002] The amorphous state refers to a state in which the material has no time to crystallize during the rapid cooling and solidification process, and the atomic arrangement maintains the short-range order and long-range disorder of liquid metal. Due to the lack of long-range atomic order, compared with traditional crystalline alloy materials, amorphous alloys exhibit many excellent properties, such as good mechanical properties, strong corrosion resistance, and unique magnetoelectric properties, etc. This makes amorphous alloys show a wide range of application prospects. [0003] As a magnetic material, amorphous soft magnetic alloys not only have excellent soft magnetic properties, such as high magnetic permeability, low coer...

Claims

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Application Information

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IPC IPC(8): C22C45/04C22C1/02
Inventor 沈宝龙宁伟蔡平平
Owner NINGBO INNOVATION CENT FOR APPLIED MAGNETICS CO LTD
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