Method of producing bulk amorphous alloy material with excellent mechanical performances and high-magnetostriction

A kind of amorphous alloy and stretching technology, which is applied in the field of preparation of bulk amorphous alloys to achieve the effects of good thermal stability, high magnetostriction coefficient and high hardness

Active Publication Date: 2010-07-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Method of producing bulk amorphous alloy material with excellent mechanical performances and high-magnetostriction
  • Method of producing bulk amorphous alloy material with excellent mechanical performances and high-magnetostriction
  • Method of producing bulk amorphous alloy material with excellent mechanical performances and high-magnetostriction

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Embodiment 1: preparation (Fe 72 Nb 4 B 24 ) 96 Tb 4 Bulk amorphous alloy rod

[0020] By atomic percent Fe 72 Nb 4 B 24 Fe with a purity of 99.6%, and alloys of Nb and FeB with a purity of 99.8% were accurately weighed. Put the weighed raw materials of target components into a vacuum high-frequency induction melting furnace, and draw a vacuum to 4.0×10 -3Pa, filled with high-purity argon protection, adjust the current from small to large, induction heating until the sample melts. Repeated smelting 5 times to obtain evenly mixed Fe 72 Nb 4 B 24 Master alloy ingots. Fe 72 Nb 4 B 24 The master alloy ingot is broken into small pieces after descaling, and ultrasonically cleaned in alcohol. The available Fe 72 Nb 4 B 24 Small block alloys and Tb with a purity of 99.9% by atomic percentage (Fe 72 Nb 4 B 24 ) 96 Tb 4 Weigh it and put it into a quartz tube with an open lower end and a hole diameter of 0.5mm, and draw a vacuum to 3.4×10 -3 After Pa, fill...

Embodiment 2

[0021] Embodiment 2: preparation (Fe 72 Nb 4 B 24 ) 95 Tb 5 Bulk amorphous alloy rod

[0022] By atomic percent Fe 72 Nb 4 B 24 Accurately weigh Fe with a purity of 99.6%, Nb with a purity of 99.8%, and FeB alloy. Put the weighed raw materials of target components 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 7 times to obtain evenly mixed Fe 72 Nb 4 B 24 Master alloy ingots. Fe 72 Nb 4 B 24 The master alloy ingot is broken into small pieces after descaling, and ultrasonically cleaned in alcohol. The available Fe 72 Nb 4 B 24 Small block alloys and Tb with a purity of 99.9% by atomic percentage (Fe 72 Nb 4 B 24 ) 95 Tb 5 Weigh it, put it into a quartz tube with an open lower end and a hole diameter of 0.6 mm, heat it in a vacuum by induction, and draw a vacuum to 3.6×10...

Embodiment 3

[0023] Embodiment 3: preparation (Fe 72 Nb 4 B 24 ) 94 Tb 6 Bulk amorphous alloy rod

[0024] By atomic percent Fe 72 Nb 4 B 24 Accurately weigh Fe with a purity of 99.6%, Nb with a purity of 99.8%, and FeB alloys, 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 Nb 4 B 24 Master alloy ingots. Fe 72 Nb 4 B 24 The master alloy ingot is broken into small pieces after descaling, and ultrasonically cleaned in alcohol. The available Fe 72 Nb 4 B 24 Small block alloys and Tb with a purity of 99.9% by atomic percentage (Fe 72 Nb 4 B 24 ) 94 Tb 6 Weigh it and put it into a quartz tube with an open lower end and a hole diameter of 0.4mm, and draw a vacuum to 3.4×10 -3 After Pa, fill the induction ...

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Abstract

The invention discloses a bulk amorphous alloy with both fine mechanical property and high magnetoconstriction and a preparation method thereof. The bulk amorphous alloy has the following chemical formula: (FeaNbbBc) 1-xTbx, wherein, a is more than or equal to 65 and less than or equal to 75, b is 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. For the bulk amorphous alloy, materials are mixed according to a general formula of FeaNbbBc; first, the FeaNbbBc is smelted into master alloy, and then a master alloy spindle is ground into small pieces; Tb metal is added according to atomic ratio of (FeaNbbBc) 1-xTbx; a bar-shaped alloy sampleis obtained by putting the raw materials to an induction furnace for melting and carrying out direct spray casting; as a result, volatilization of rare earth element Tb can be reduced. The bulk amorphous alloy of the invention has a magnetostriction coefficient ranging from 398ppm to 976ppm; meanwhile, the alloy has simple components, high thermal stability and fine mechanical performance and amorphous forming capacity. The Fe-based bulk amorphous alloy of the invention can be widely applied to magnetic materials such as magnetostriction materials and the like.

Description

technical field [0001] The invention relates to the field of amorphous magnetic materials, in particular to a method for preparing a bulk amorphous alloy with excellent mechanical properties and high magnetostriction. 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=δl / l, l and δl 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 magneti...

Claims

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Application Information

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