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Bulk amorphous alloy magnetostriction material and method of producing the same

A technology of magnetostrictive material and amorphous alloy, which is applied in the field of bulk amorphous alloy magnetostrictive material and its preparation, and achieves the effects of simple composition, high thermal stability, high glass transition temperature and crystallization temperature

Inactive Publication Date: 2012-09-26
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

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Effect test

Embodiment 1

[0018] In this embodiment, a copper mold injection method is used to prepare (Fe 72 Mo 4 B 24 ) 96 Dy 4 Bulk amorphous alloy rod.

[0019] Fe in atomic percentage 72 Mo 4 B 24 Accurately weigh Fe with a purity of 99.6%, Mo and FeB alloy with a purity of 99.8%, and put the weighed target component raw materials into a vacuum high-frequency induction melting furnace, and extract the vacuum to 4.0×10 -3 After Pa, fill with high-purity argon for protection, adjust the current from small to large, and induce heating until the sample melts. Repeated smelting 6 times to obtain evenly mixed Fe 72 Mo 4 B 24 Master alloy ingots. Take the Fe obtained 72 Mo 4 B 24 After removing the oxide layer, the master alloy ingot is broken into small pieces, and is ultrasonically cleaned in alcohol. Fe obtained 72 Mo 4 B 24 Small alloys and Dy with a purity of 99.9% are in atomic percentage (Fe 72 Mo 4 B 24 ) 96 Dy 4 Weigh and put it into a quartz tube with an opening at the lower end and a hole diamete...

Embodiment 2

[0021] In this embodiment, a copper mold injection method is used to prepare (Fe 72 Mo 4 B 24 ) 95 Dy 5 Bulk amorphous alloy rod.

[0022] Fe in atomic percentage 72 Mo 4 B 24 Accurately weigh Fe with a purity of 99.6%, Mo and FeB alloy with a purity of 99.8%, and put the weighed target component raw materials into a vacuum high-frequency induction melting furnace, and extract the vacuum to 4.0×10 -3 After Pa, fill with high-purity argon for protection, adjust the current from small to large, and induce heating until the sample melts. Repeated smelting 10 times to obtain evenly mixed Fe 72 Mo 4 B 24 Master alloy ingots. Take the Fe obtained 72 Mo 4 B 24 After removing the oxide layer, the master alloy ingot is broken into small pieces, and is ultrasonically cleaned in alcohol. Fe obtained 72 Mo 4 B 24 Small alloys and Dy with a purity of 99.9% are in atomic percentage (Fe 72 Mo 4 B 24 ) 95 Dy 5 Weigh and put it into a quartz tube with an opening at the lower end and a hole diamet...

Embodiment 3

[0024] In this embodiment, a copper mold injection method is used to prepare (Fe 72 Mo 4 B 24 ) 94 Dy 6 Bulk amorphous alloy rod.

[0025] Fe in atomic percentage 72 Mo 4 B 24 Accurately weigh Fe with a purity of 99.6%, Mo and FeB alloy with a purity of 99.8%, and put the weighed target component raw materials into a vacuum high-frequency induction melting furnace, and extract the vacuum to 4.0×10 -3 After Pa, fill with high-purity argon for protection, adjust the current from small to large, and induce heating until the sample melts. Repeated smelting 9 times to obtain evenly mixed Fe 72 Mo 4 B 24 Master alloy ingots. Take the Fe obtained 72 Mo 4 B 24 After removing the oxide layer, the master alloy ingot is broken into small pieces, and is ultrasonically cleaned in alcohol. Fe obtained 72 Mo 4 B 24 Small alloys and Dy with a purity of 99.9% are in atomic percentage (Fe 72 Mo 4 B 24 ) 94 Dy 6 Weigh it and put it into a quartz tube with an opening at the lower end and a hole diam...

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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 super cooling 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 changes in a magnetic field, ferromagnetic and ferrimagnetic materials cause small changes in size or volume. This phenomenon is called magnetostriction. The magnitude of the magnetostrictive effect is represented by the magnetostrictive coefficient λ. Its value is λ=δl / l, and l and δl are the original length of the magnet and the change in length after magnetization. Traditional magnetostrictive materials are Ni and Fe-based alloys. The saturation magnetostriction coefficient λs of these metals and alloys is (±30-70)×10 -6 Because the lambda of this type of material is too small, the range of use is limited. In the early 1960s, it was discovered that rare earth elements (R) have many unique magnetic properties. For example...

Claims

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Application Information

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