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Method for improving magnetostrictive property of FeGa alloy

A technology of magnetostriction and performance, applied in the field of magnetic materials, can solve the problems such as magnetostrictive materials of FeGa polycrystalline materials that have not been reported yet, and achieve the effects of excellent magnetostrictive performance, increased service time, and improved magnetostrictive performance.

Active Publication Date: 2017-04-05
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, there has been no report on cryogenic treatment of FeGa polycrystalline magnetostrictive materials with liquid nitrogen

Method used

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  • Method for improving magnetostrictive property of FeGa alloy
  • Method for improving magnetostrictive property of FeGa alloy
  • Method for improving magnetostrictive property of FeGa alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A cast Fe 82 Ga 18 The preparation method of alloy ingot, described method specific steps are as follows:

[0034] (1) Ingredients

[0035] Using pure iron with a purity greater than 99.99% and pure gallium with a purity greater than 99.99% as raw materials, first polish the surface oxide skin, then put it into a beaker containing acetone solution, and put the beaker into an ultrasonic cleaning machine for vibration cleaning for 5 minutes , then place it on filter paper and dry it with a hair dryer, use an electronic balance to take 4 parts of alloy ingot raw materials according to the ratio of the amount of pure iron and pure gallium to 82:18, each part of 30g;

[0036] (2) Melting

[0037] Using a high-vacuum electric arc melting furnace, the 4 parts of alloy ingot raw materials are arranged in a copper crucible according to pure gallium on the bottom and pure iron on the top, and are smelted to obtain an alloy button ingot;

[0038] The smelting treatment specifi...

Embodiment 2

[0043] An enhanced Fe 82 Ga 18 A method for alloy magnetostrictive properties, said method comprising the steps of:

[0044] (1) the as-cast Fe prepared in embodiment 1 82 Ga 18 Put the alloy ingot into the quartz tube, and evacuate until the vacuum degree is less than 2.5×10 -3 Pa, filled with argon to form a protective atmosphere; first heat the box-type resistance heat treatment furnace to 800 ° C, keep it warm for 10 minutes, then put the quartz tube into the box-type resistance heat treatment furnace, take out the quartz tube after 24 hours of heat preservation, and immediately It is immersed in a sodium chloride solution and quenched to room temperature, and the quartz tube is removed to obtain Fe82-ori;

[0045] (2) Submerge Fe82-ori in liquid nitrogen, cryogenically treat for 1 minute, take out the Fe82-ori and immediately utilize a hair dryer to raise its temperature to room temperature; 40 times, obtain a series of FeGa polycrystalline magnetostrictive alloy mat...

Embodiment 3

[0050] A method to improve as-cast Fe 85 Ga 15 The preparation method of alloy ingot, described method specific steps are as follows:

[0051] (1) Ingredients

[0052] Using pure iron with a purity greater than 99.99% and pure gallium with a purity greater than 99.99% as raw materials, first polish the surface oxide skin, then put it into a beaker containing acetone solution, and put the beaker into an ultrasonic cleaning machine for vibration cleaning for 5 minutes , then place it on the filter paper and dry it with a hair dryer, use an electronic balance to take 4 parts of alloy ingot raw materials according to the ratio of the amount of pure iron and pure gallium as 85:15, each part of 30g;

[0053] (2) Melting

[0054] Using a high-vacuum electric arc melting furnace, the 4 parts of alloy ingot raw materials are arranged in a copper crucible according to pure gallium on the bottom and pure iron on the top, and are smelted to obtain an alloy button ingot;

[0055] The s...

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Abstract

The invention discloses a method for improving the magnetostrictive property of a FeGa alloy, and belongs to the field of magnetic materials. the method comprises the following steps: putting a FeGa alloy ingot into a quartz pipe, vacuumizing till the vacuum degree is less than or equal to 2.5 x 10<-3> Pa, and filling protective gas; placing the quartz pipe at 800 to 1,000 DEG C for 12 to 24 hours, then taking out the quartz pipe, and soaking the quartz pipe immediately into a sodium chloride solution for quenching; immersing the quenched FeGa alloy ingot into liquid nitrogen, performing deep cooling treatment for 1 to 3 min, taking out the FeGa alloy ingot, and heating to room temperature; and repeatedly performing the deep cooling treatment and heating processes for 0 to 50 times to obtain a FeGa polycrystal magnetostrictive alloy material, thus completing the method for improving the magnetostrictive property of the FeGa alloy. The FeGa polycrystal magnetostrictive alloy material obtained according to the method is high in magnetostrictive property, low in driving field and relatively high in mechanical property.

Description

technical field [0001] The invention relates to a method for improving the magnetostrictive performance of FeGa alloy, which belongs to the field of magnetic materials. Background technique [0002] FeGa alloy is a non-rare-earth giant magnetostrictive material newly developed in recent years. Compared with traditional rare-earth magnetic materials, this material has low hysteresis, low saturation magnetic field, high magnetization, excellent mechanical properties and processability. Obvious low-cost advantage, but its magnetostrictive properties still have a certain gap with that of rare earth materials such as terbium dysprosium iron, which restricts the application of FeGa alloys in practical engineering fields. After heat treatment, more complex processing methods such as rolling and directional solidification are used to make the structure of FeGa polycrystalline material have a preferred orientation to improve the magnetostriction coefficient, and the new and simple pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D6/04
CPCC21D6/04
Inventor 聂志华王沿东李高强朱城
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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