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High magnetic striction iron based metallic glass magnetic material and preparation thereof

A technology of iron-based metal and magnetic material, applied in the field of iron-based metal glass magnetic material and its preparation, to achieve the effects of high hardness, simple composition and good thermal stability

Inactive Publication Date: 2010-09-01
ZHEJIANG UNIV +1
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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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  • High magnetic striction iron based metallic glass magnetic material and preparation thereof
  • High magnetic striction iron based metallic glass magnetic material and preparation thereof
  • High magnetic striction iron based metallic glass magnetic material and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] This embodiment adopts copper mold injection casting method to prepare diameter 2-3mm (Fe 72 Mo 4 B 24 ) 96 Tb 4 Metal glass alloy rod.

[0017] Fe, Mo, B and Tb elements according to (Fe 72 Mo 4 B 24 ) 96 Tb 4 After the alloy atomic percentage is converted into mass percentage, Fe with a purity of 99.6%, Mo with a purity of 99.8%, Tb with a purity of 99.9% and FeB alloy are accurately weighed and put into the quartz tube in the induction furnace. Draw 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 8 times to obtain a homogeneously mixed (Fe 72 Mo 4 B 24 ) 96 Tb 4 Master alloy ingots. The obtained spindles were broken into small pieces and placed in alcohol for ultrasonic cleaning. Then put it into a quartz tube with an open lower end and a hole diameter of 0.5mm, and draw a vacuum to 3.8×10 -3 After Pa, fill the induction furnace cavi...

Embodiment 2

[0019] This embodiment adopts copper mold injection casting method to prepare diameter 2-3mm (Fe 72 Mo 4 B 24 ) 95 Tb 5 Metal glass alloy rod.

[0020] Fe, Mo, B and Tb elements according to (Fe 72 Mo4 B 24 ) 95 Tb 5 After the alloy atomic percentage is converted into mass percentage, Fe with a purity of 99.6%, Mo with a purity of 99.8%, Tb with a purity of 99.9% and FeB alloy are accurately weighed and put into the quartz tube in the induction furnace. Draw 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 5 times to obtain a homogeneously mixed (Fe 72 Mo 4 B 24 ) 95 Tb 5 Master alloy ingots. Will get (Fe 72 Mo 4 B 24 ) 95 Tb 5 The master alloy ingot was broken into small pieces and ultrasonically cleaned in alcohol. Then put it into a quartz tube with an open lower end and a hole diameter of 0.6mm, and draw a vacuum to 3.7×10 -3 After Pa, ...

Embodiment 3

[0022] This embodiment adopts copper mold injection casting method to prepare diameter 2-4mm (Fe 72 Mo 4 B 24 ) 94 Tb 6 Metal glass alloy rod.

[0023] Fe, Mo, B and Tb elements according to (Fe 72 Mo 4 B 24 ) 94 Tb 6 After the alloy atomic percentage is converted into mass percentage, Fe with a purity of 99.6%, Mo with a purity of 99.8%, Tb with a purity of 99.9% and FeB alloy are accurately weighed and put into the quartz tube in the induction furnace. Draw 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 a homogeneously mixed (Fe 72 Mo 4 B 24 ) 94 Tb 6 Master alloy ingots. Will get (Fe 72 Mo 4 B 24 ) 94 Tb 6 The master alloy ingot was broken into small pieces and ultrasonically cleaned in alcohol. Then put it into a quartz tube with an open lower end and a hole diameter of 0.5mm, and draw a vacuum to 3.2×10 -3 After Pa...

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Abstract

The invention discloses a high magnetostrictive Fe-based metal glass magnetic material and a preparation method thereof. The chemical formula of the high magnetostrictive Fe-based metal glass alloy is Fe100-x-y-zMozByTbx, wherein, x, y and z are respectively the atomic percents of Tb, B and Mo, 100-x-y-z is the atomic percent of Fe, x is more than 0 and less than or equal to 10, y is more than orequal to 20 and less than or equal to 25, z is more than 0 and less than or equal to 10. The preparation method of the alloy is as follows: the industrial pure metals Fe, Mo, Tb and FeB alloy are proportioned according to the alloy formula and melted repeatedly by induction-arc under the protection of argon to make master alloy, then the high magnetostrictive Fe-based metal glass magnetic material is obtained through casting by using the copper mold spray-casting method. The magnetostrictive coefficient of the magnetic material is 420 ppm to 985 ppm, and the magnetic material has simple components, high thermal stability, and good mechanical properties and amorphous forming ability. The high magnetostrictive Fe-based metal glass magnetic material can be widely applied to the fields of sonar transducer, sensor, ultrasonic technology, communication technology, and the like.

Description

technical field [0001] The invention relates to the field of metallic glass magnetic materials, in particular to an iron-based metallic glass magnetic material with high magnetostriction 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=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 magne...

Claims

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Application Information

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