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Giant magnetostrictive large volume Fe81Ga19 alloy material and preparation method thereof

A fe81ga19, giant magnetostrictive technology, applied in the field of metal materials, can solve the problems of high magnetostrictive strain and no engineering application value, achieve oxidation and loss reduction, best magnetostrictive performance, and simple and easy process technology The effect of the operation

Inactive Publication Date: 2009-12-23
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, some scholars have prepared magnetostrictive strains as high as 1000×10 by using the stripping method. -6 Fe-Ga alloy, and the thickness of the obtained material is generally around tens of microns, which has no practical engineering application value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 19at.% of Ga elements with a purity of 99.99%, and the remainder of Fe elements with a purity of 99.99%, put a total of 30g into a water-cooled copper crucible in a vacuum electric arc furnace, and evacuate to 3.0×10 -3 Pa; backfill with argon, keep vacuum to 4×10 4 Pa, start arc smelting Fe and Ga elements; smelt for 3 minutes until the alloy elements are completely melted, then break the arc to form an alloy ingot; flip the alloy ingot and smelt it three times to make the composition of the alloy uniform; after cooling, a button-shaped casting ingot;

[0025] Cut the Fe-Ga alloy button ingot into cuboid metal pieces with dimensions of 6-8mm in length, 4mm in width and 4mm in height; then grind the surface of the metal piece with a grinding wheel to remove surface impurities.

[0026] Put 3 to 4 small pieces of metal into a quartz crucible and completely cover it with a glass purifier; then put it into a vacuum electromagnetic induction furnace for melting; firs...

Embodiment 2

[0031] Weigh 19at.% of Ga element with a purity of 99.99%, and the balance of Fe element with a purity of 99.99%, totaling 50g; put it into a water-cooled copper crucible in a vacuum electric arc furnace, and evacuate to 3.0×10 -3 Pa; backfill with argon, keep vacuum to 5×10 4 Pa, start arc smelting Fe and Ga elements; smelt for 3 minutes until the alloy elements are completely melted, then break the arc to form an alloy ingot; flip the alloy ingot and smelt it three times to make the composition of the alloy uniform; after cooling, a button shape is formed Ingot;

[0032] Cut the Fe-Ga button ingot into cuboid metal pieces, the size of which is: length 6-8mm, width 4mm, height 4mm; then use a grinding wheel to polish the surface of the metal block to remove surface impurities.

[0033] Put 3 to 4 small pieces of metal into a quartz crucible and completely cover it with a glass purifier; then put it into a vacuum electromagnetic induction furnace for melting; first heat the F...

Embodiment 3

[0038] Weigh 19at.% of Ga element with a purity of 99.99%, and the remainder of Fe with a purity of 99.99%, totaling 25 grams; put it into a water-cooled copper crucible in a vacuum electric arc furnace, and evacuate to 3.0×10 -3 Pa; backfill with argon, keep vacuum to 5×10 4 Pa, start arc smelting Fe and Ga; smelt for 3 minutes until the alloy elements are completely melted, then break the arc to form an alloy ingot; flip the alloy ingot repeatedly and remelt three times to make the composition of the alloy uniform; after cooling, a button-shaped ingot is formed ;

[0039] Cut the Fe-Ga button ingot into cuboid metal pieces, the size of which is: length 6-8mm, width 4mm, height 4mm; then use a grinding wheel to polish the surface of the metal block to remove surface impurities.

[0040] Put 3 to 4 small pieces of metal into a quartz crucible and completely cover it with a glass purifier; then put it into a vacuum electromagnetic induction furnace for melting; first heat the ...

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Abstract

The invention relates to a giant magnetostrictive large volume Fe81Ga19 alloy material and a preparation method thereof, belonging to the technical field of the alloy material and the atom percent of the alloy material is Fe81at.% and Ga19 at.%; the preparation method comprises the steps of Fe element and Ga element arc melting, solidification remelting superheat cycle process and high undercooling activation unidirectional solidification. The invention adopts high undercooling activation process so that Fe-Ga alloy blocks can be obtained while the alloy has the giant magnetostrictive property. The magnetostrictive strain of the Fe-Ga alloy blocks is above 500*10 generally and the maximum magnetostrictive strain can reach 830*10.

Description

technical field [0001] The invention relates to an alloy in the technical field of metal materials and a preparation method thereof, in particular to a giant magnetostrictive large-volume Fe 81 Ga 19 Alloy materials and their preparation methods. Background technique [0002] Magnetostrictive materials have important applications in the field of national defense, electronics industry, machinery industry, ultrasonic field, etc., and are mainly used as the core components of drivers and sensors. At present, the materials with giant magnetostrictive properties are mainly rare earth-transition metal alloys, the most representative of which is the commercially available Terfenol-D alloy. Mo Xiping published an article "Terfenol- The application of this material is reported in detail in "Fish lip flexural transducer". However, the brittleness and high price of Terfenol-D alloy (rare earth raw materials are expensive) limit the application of this alloy. Therefore, the developm...

Claims

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Application Information

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IPC IPC(8): C22C38/00C22C33/04C22B9/16B22D27/04H10N35/85
Inventor 高翔周建坤李建国
Owner SHANGHAI JIAO TONG UNIV
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