Novel magnetostrictive material designed according to FeGa-RFe2 magnetocrystalline anisotropy compensation principle and preparation method thereof

A technology of magnetostrictive materials and magnetocrystalline anisotropy, which is applied in the direction of material selection and device material selection for magnetostrictive devices, can solve problems such as high brittleness, high cost, and unfavorable machining, and achieve magnetostrictive The effect of high expansion and contraction performance

Active Publication Date: 2014-02-05
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the TbDyFe alloy system has great magnetostrictive performance, and the saturation magnetostrictive strain can reach 1800-2000ppm, but after the magnetic anisotropy is compensated, it still has a slightly larger driving magnetic field; and the rare earth elements account for more than 60%, and the cost is high , high brittleness, not conducive to machining

Method used

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  • Novel magnetostrictive material designed according to FeGa-RFe2 magnetocrystalline anisotropy compensation principle and preparation method thereof
  • Novel magnetostrictive material designed according to FeGa-RFe2 magnetocrystalline anisotropy compensation principle and preparation method thereof
  • Novel magnetostrictive material designed according to FeGa-RFe2 magnetocrystalline anisotropy compensation principle and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Prepare 10g of the target component (Fe 83 Ga 17 ) 16 (TbFe 2 ) 1 Magnetostrictive alloy, the dosage is Fe: 7.953g, Ga: 2.031g, Tb: 0.016g. The mass percent purity of Fe, Ga and Tb is 99.99%.

[0051] It is smelted in a vacuum non-consumable arc melting furnace, and the vacuum is first evacuated to 4.0×10 －3 Pa, flushed into the furnace with argon gas, and then vacuumed to 2.0×10 －3 Pa, then filled with argon to a vacuum of 1×10 －1 Arc smelting after Pa again, with 140A electric current the raw material is melted into alloy and refined for 5 minutes, repeated smelting 4 times, obtains (Fe 83 Ga 17 ) 16 (TbFe 2 ) 1 Ingot;

[0052] Will (Fe 83 Ga 17 ) 16 (TbFe 2 ) 1 The ingot was wire-cut into 4 parts of similar size, and was ultrasonically cleaned with acetone for 8 minutes at a frequency of 40KHz, and then dried in an oven at 80°C for 15 minutes to obtain a clean (Fe 83 Ga 17 ) 16 (TbFe 2 ) 1 sample;

[0053] Will clean (Fe 83 Ga 17 ) 16 (TbFe ...

Embodiment 2

[0073] Prepare 10g of the target component (Fe 83 Ga 17 ) 4 (DyFe 2 ) 1 Magnetostrictive alloy, the dosage is Fe: 7.918g, Ga: 2.012g, Dy: 0.070g. The mass percent purity of Fe, Ga and Dy is 99.99%.

[0074] It is smelted in a vacuum non-consumable arc melting furnace, and the vacuum is first evacuated to 4.0×10 －3 Pa, flushed into the furnace with argon gas, and then vacuumed to 2.0×10 －3 Pa, then filled with argon to a vacuum of 1×10 －1 Arc smelting after Pa again, with 125A electric current, the raw material is melted into alloy and refined for 5 minutes, repeated smelting 4 times to obtain (Fe 83 Ga 17 ) 4 (DyFe 2 ) 1 Ingot;

[0075] Will (Fe 83 Ga 17 ) 4 (DyFe 2 ) 1 The ingot was wire-cut into 4 pieces of similar size, and was ultrasonically cleaned with acetone for 5 minutes at a frequency of 30KHz, and then dried in an oven at 120°C for 10 minutes to obtain a clean (Fe 83 Ga 17 ) 4 (DyFe 2 ) 1 sample;

[0076] Will clean (Fe 83 Ga 17 ) 4 (DyFe ...

Embodiment 3

[0083] Prepare 10g of the target component (Fe 83 Ga 17 ) 6 (HoFe 2 ) 1 Magnetostrictive alloy, the dosage is Fe: 7.934g, Ga: 2.021g, Ho: 0.045g. The mass percent purity of Fe, Ga and Ho is 99.99%.

[0084] It is smelted in a vacuum non-consumable arc melting furnace, and the vacuum is first evacuated to 4.0×10 －3 Pa, flushed into the furnace with argon gas, and then vacuumed to 2.0×10 －3 Pa, then filled with argon to a vacuum of 1×10 －1 Arc smelting after Pa again, with 120A electric current the raw material is melted into alloy and refined for 5 minutes, repeated smelting 4 times, obtains (Fe 83 Ga 17 ) 6 (HoFe 2 ) 1 Ingot;

[0085] Will (Fe 83 Ga 17 ) 6 (HoFe 2 ) 1 The ingot was wire-cut into 4 pieces of similar size, and was ultrasonically cleaned with acetone for 8 minutes at a frequency of 40KHz, and then dried in an oven at 100°C for 10 minutes to obtain a clean (Fe 83 Ga 17 ) 6 (HoFe 2 ) 1 sample;

[0086] Will clean (Fe 83 Ga 17 ) 6 (HoFe 2 ...

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Abstract

The invention discloses a novel magnetostrictive material designed according to a FeGa-RFe2 magnetocrystalline anisotropy compensation principle and a preparation method thereof. The composition of the magnetostrictive material is (Fe100-XGaX)Y(RFe2)Z, wherein X is more than or equal to 10 and less than or equal to 40, the compensation compositions ratio of Y:Z in a Y-Z regulating pseudo-binary system is 1-20, RFe2 is one or more than one of TbFe2, SmFe2, DyFe2, HoFe2, ErFe2 and TmFe2, and X, Y, and Z are mole percentage contents. In the novel magnetostrictive material designed according to a FeGa-RFe2 magnetocrystalline anisotropy compensation principle, since a trace of rare-earth RFe2 component with large magneto-strain property is added into non-rare-earth FeGa based magnetostrictive alloy compositions, and magnetocrystalline anisotropy compensation is carried out on FeGa compositions, thus obtaining the novel magnetostrictive material with advantageous properties such as large magneto-strain, low drive field, high mechanical property, low cost, and the like.

Description

technical field [0001] The present invention relates to a kind of magnetostrictive material, more particularly, refers to a kind of based on FeGa-RFe 2 A novel magnetostrictive material designed based on the principle of magnetocrystalline anisotropy compensation and its preparation method. Background technique [0002] The length and volume of ferromagnetic materials and ferrimagnetic materials will change slightly due to the change of magnetization state. This phenomenon is called magnetostriction. Magnetostrictive material is an important functional material. It has been widely used in robots, computers, automobiles, actuators, controllers, transducers, sensors, micro-displacers, shockproof devices, ultrasonic waves and other fields. Sonar is the earliest and most important application component of magnetostrictive materials. Its core components are piezoelectric materials and magnetostrictive materials. Magnetostrictive materials are superior to piezoelectric materials...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/00B22D11/06H01L41/20
Inventor 蒋成保吴伟张天丽刘敬华王敬民
Owner BEIHANG UNIV
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