Bulk amorphous alloy magnetostriction material and method of producing the same

A technology of magnetostrictive materials and amorphous alloys, applied in the field of bulk amorphous alloy magnetostrictive materials and their preparation, to achieve high thermal stability, high glass transition temperature and crystallization temperature, and high magnetostrictive coefficient Effect

Inactive Publication Date: 2009-08-19
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the amorphous alloys reported by Inoue are limited to thin strips, and there are few studies on the magnetostrictive properties of metallic glasses at home and abroad.

Method used

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  • Bulk amorphous alloy magnetostriction material and method of producing the same
  • Bulk amorphous alloy magnetostriction material and method of producing the same
  • Bulk amorphous alloy magnetostriction material and method of producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] This embodiment adopts copper mold injection casting method to prepare diameter 2-3mm (Fe 72 Mo 4 B 24 ) 96 Dy 4 Bulk amorphous alloy rods.

[0019] By atomic percent Fe 72 Mo 4 B 24 Accurately weigh Fe with a purity of 99.6%, Mo and FeB alloys with a purity of 99.8%, put the weighed target composition raw materials into a vacuum high-frequency induction melting furnace, and draw a vacuum to 4.0×10 -3 Pa, filled with high-purity argon protection, adjust the current from small to large, induction heating until the sample melts. Repeated smelting 6 times to obtain evenly mixed Fe 72 Mo 4 B 24 Master alloy ingots. Fe 72 Mo 4 B 24 The master alloy ingot is broken into small pieces after removing the oxide layer, and ultrasonically cleaned in alcohol. Get Fe 72 Mo 4 B 24 Small block alloys and Dy with a purity of 99.9% by atomic percentage (Fe 72 Mo 4 B 24 ) 96 Dy 4 Weigh it and put it into a quartz tube with an open lower end and a hole diameter of 0....

Embodiment 2

[0021] This embodiment adopts copper mold injection casting method to prepare diameter 2-3mm (Fe 72 Mo 4 B 24 ) 95 Dy 5 Bulk amorphous alloy rods.

[0022] By atomic percent Fe 72 Mo 4 B 24 Accurately weigh Fe with a purity of 99.6%, Mo and FeB alloys with a purity of 99.8%, put the weighed target composition raw materials into a vacuum high-frequency induction melting furnace, and draw a vacuum to 4.0×10 -3 Pa, filled with high-purity argon protection, adjust the current from small to large, induction heating until the sample melts. Repeated smelting 10 times to obtain evenly mixed Fe 72 Mo 4 B 24 Master alloy ingots. Fe 72 Mo 4 B 24 The master alloy ingot is broken into small pieces after removing the oxide layer, and ultrasonically cleaned in alcohol. Get Fe 72 Mo 4 B 24 Small block alloys and Dy with a purity of 99.9% by atomic percentage (Fe 72 Mo 4 B 24 ) 95 Dy 5 Weigh it, and put it into a quartz tube with an open lower end and a hole diameter of ...

Embodiment 3

[0024] This embodiment adopts copper mold injection casting method to prepare diameter 2-4mm (Fe 72 Mo 4 B 24 ) 94 Dy 6 Bulk amorphous alloy rods.

[0025] By atomic percent Fe 72 Mo 4 B 24 Accurately weigh Fe with a purity of 99.6%, Mo and FeB alloys with a purity of 99.8%, put the weighed target composition raw materials into a vacuum high-frequency induction melting furnace, and draw a vacuum to 4.0×10 -3 Pa, filled with high-purity argon protection, adjust the current from small to large, induction heating until the sample melts. Repeated smelting 9 times to obtain evenly mixed Fe 72 Mo 4 B 24 Master alloy ingots. Fe 72 Mo 4 B 24 The master alloy ingot is broken into small pieces after removing the oxide layer, and ultrasonically cleaned in alcohol. Get Fe 72 Mo 4 B 24 Small block alloys and Dy with a purity of 99.9% by atomic percentage (Fe 72 Mo 4 B 24 ) 94 Dy 6 Weigh it and put it into a quartz tube with an open lower end and a hole diameter of 0....

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Abstract

The invention discloses a block amorphous alloy magnetostriction material and a preparation method thereof. The block amorphous alloy magnetostriction material has the following chemical formula: (FeaMobBc) 1-xDyx, wherein, a is more than or equal to 65 and less than or equal to 75, b more than or equal to 2 and less than or equal to 8, c is more than or equal to 20 and less than or equal to 25, x is more than or equal to 1 and less than or equal to 10, and a plus b plus c equals 100. The preparation method of the block amorphous alloy has the following steps: firstly, materials are mixed by following the general formula of FeaMobBc; FeaMobBc is melted into master alloy; then a master alloy spindle is ground to small pieces; according to atomic ratio of (FeaMobBc) 1-xDyx, Dy metal is added; a bar-shaped alloy sample is obtained by putting the raw materials to a silica tube for smelting and carrying out direct spray casting; as a result, volatilization of rare earth element Dy can be reduced. The block amorphous alloy magnetostriction material of the invention has very high magnetostriction coefficient and wide supercooling liquid phase region. Moreover, the thermal stability thereof is high and the glass transition temperature and crystallization temperature thereof are relatively high, thus contributing to the application of the material at relatively high temperature. Therefore, the amorphous alloy enjoys potential application prospect.

Description

technical field [0001] The invention relates to the field of amorphous magnetostrictive materials, in particular to a bulk amorphous alloy magnetostrictive material and a preparation method thereof. Background technique [0002] When the magnetization state is changed in a magnetic field, ferromagnetic and ferrimagnetic materials cause small changes in size or volume, a phenomenon known as magnetostriction. The magnitude of the magnetostrictive effect is represented by the magnetostrictive coefficient λ. Its value is λ=δ1 / 1, 1 and δ1 are the original length of the magnet and the length change after magnetization. The traditional magnetostrictive materials are Ni and Fe-based alloys. The saturation magnetostriction coefficient λs of such metals and alloys is (±30-70)×10 -6 , because the λ of this type of material is too small, the scope of application is limited. In the early 1960s, it was discovered that rare earth elements (R) have many unique magnetic properties. For e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/02C22C33/04
Inventor 严密陶姗
Owner ZHEJIANG UNIV
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