CN104775068A - High-performance macroscopic foam-state Fe73Ga27 magnetostrictive material and preparation process thereof - Google Patents
High-performance macroscopic foam-state Fe73Ga27 magnetostrictive material and preparation process thereof Download PDFInfo
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- CN104775068A CN104775068A CN201510153782.7A CN201510153782A CN104775068A CN 104775068 A CN104775068 A CN 104775068A CN 201510153782 A CN201510153782 A CN 201510153782A CN 104775068 A CN104775068 A CN 104775068A
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Abstract
The invention discloses a high-performance macroscopic foam-state Fe73Ga27 magnetostrictive material and a preparation process thereof. Holes are introduced into an Fe73Ga27 alloy by preparing a porous sodium metaaluminate precursor so as to ensure that the magnetostrictive performance of the Fe73Ga27 alloy can be improved; the pore size is 20-100 microns, and the porosity is 30-50%; and the preparation process comprises the following step: performing spray casting in a copper mold by using a vacuum spray casting furnace. According to the high-performance macroscopic foam-state Fe73Ga27 magnetostrictive material and the preparation process thereof disclosed by the invention, the hindering effect of magnetic domain rotation in Fe73Ga27 can be reduced based on introduced pores, the macroscopic foam-state Fe73Ga27 magnetostrictive material can be developed, and large magnetic-induced strain, low driving fields and relatively high mechanical performance can be achieved; and a foam material prepared by using a method disclosed by the invention is uniform in pore, ensures that the magnetostrictive coefficient exceeds 300ppm, also is simple and convenient in process and high in finished product rate, and is beneficial to popularization and application.
Description
Technical field
The invention belongs to magnetostriction materials field, relate to a kind of high-performance macroscopic bubbles state Fe
73ga
27magnetostriction materials and preparation technology thereof.
Background technology
Fe-Ga is a kind of solid-solution material formed by Ga atom and Fe atom, its saturation magnetostriction constant (monocrystal material λ s ~ 400 ppm) is tens times of traditional iron-based and Ni-based magnetostriction materials, and driving magnetic field very low (~ 100 Oe), is only 1/10 of terbium dysprosium ferrum giant magnetostrictive material.Compared with traditional rare earth ultra-magnetostriction material, iron gallium alloy also has good mechanical property and magnetostriction temperature stability, and (tensile strength, up to 500 MPa, is about 23 times of Tb-Dy-Fe alloy; Curie temperature ~ 675 DEG C, higher than Tb-Dy-Fe alloy 300 DEG C, Magnetostriction can remain on-20 ~ 80 DEG C of wider temperature ranges), and not containing rare earth, material cost is relatively lower.
In recent years, people were in theory and experimentally done a large amount of research work to Fe-Ga magnetostriction materials, but it be unclear that for the mechanism of Fe-Ga alloy generation big magnetostriction, limited the further raising of Magnetostriction.
Research finds, Ga is not simple diluting effect on the impact of Fe magnetic moment, and the magnetic moment of atom of Fe changes with the difference of Ga content, and the increase of magnetic moment makes alloy energy density increase, and causes the magnetostrictive strain of alloy to increase thus.Based on this, research Fe-Ga alloy being produced to big magnetostriction reason is mainly divided into intrinsic and outer official report two aspect.Intrinsic model mainly carries out theoretical investigation based on to Ga-Ga atom pairs lattice mismatch phenomenon in Fe-Ga alloy, and the magnetostrictive strain indicated in Fe-Ga alloy derives from the change that Ga atom second electron coordinate shell place has the Fe-Ga atom pairs of Ga – Ga atom pairs.Outer official report model thinks that the nanometer Tetragonal nonuniformity occurred in Fe-Ga makes material occur non-uniform magnetization phenomenon, effective stray field is produced around matrix, force magnetic moment to change from easy magnetization axis under outside magnetic field effect and produce strain, avoid the magnetic history first moving neticdomain wall needing more macro-energy, thus strengthen Magnetostriction.
Current related work has proved the existence of nanometer Tetragonal in Fe-Ga alloy, thinks the reorientation of these nanometer magnetic domains in magnetic field to grow up be the mechanism causing Fe-Ga alloy big magnetostriction performance.
The magneto-strain mechanism of NiMnGa material is similar with Fe-Ga, people introduce by preparing macroscopic bubbles NiMnGa the inhibition that hole decreases martensite variants twin boundary migration, make the magneto-strain of polycrystalline NiMnGa material bring up to more than 20000ppm from 20ppm.Therefore, the method preparing macroscopic bubbles NiMnGa introducing hole can be incorporated in Fe-Ga alloy, can reduce the inhibition of nanometer domain motion, thus improve the Magnetostriction of Fe-Ga polycrystalline material.
Summary of the invention
The object of this invention is to provide a kind of high-performance macroscopic bubbles state Fe
73ga
27magnetostriction materials and preparation technology thereof, the method has the macroscopic bubbles state Fe of big magnetostriction performance, low driving field, higher mechanical property, low cost by melting, cutting, sintering, spray to cast
73ga
27magnetostriction materials.
Object of the present invention realizes in the following manner:
A kind of high-performance macroscopic bubbles state Fe
73ga
27magnetostriction materials are macroscopic bubbles state shape, and its pore size is 20-100 μm, and porosity is 30%-50%.
Described high-performance macroscopic bubbles state Fe
73ga
27the preparation technology of magnetostriction materials is:
1) add scaling loss amount by described composition to prepare burden: use vacuum non-consumable arc furnace smelting nut alloy, 4*10 is evacuated to vacuum non-consumable arc-melting furnace
-3~ 5*10
-3pa, after pouring 10kPa ar purging, then suction is to 2*10
-3~ 3*10
-3pa; The volume percent purity of argon gas is 99.99%.Then being filled with argon gas melting to vacuum tightness is 40kPa ~ 50kPa, batching is melted under melting electric current 100A ~ 150A, and smelting time is 3min ~ 5min, melt back 4 ~ 5 times, obtained alloy pig,
2) alloy pig molybdenum filament wire cutting machine step 1 melted out cuts into the bulk of 6mm*6mm*10mm, is ground off to ensure non-scale in alloy block surface with sand paper, with ethanol, alloy block surface cleaning is clean, keeps dry state;
3) sodium metaaluminate and urea, mortar are moved to glove box, to ensure that sodium metaaluminate when preparing does not absorb water, weigh the mixture of 20g sodium metaaluminate and urea, in mixture, mass percent shared by urea is 40% ~ 60%, after urea and sodium metaaluminate mix with mortar grinder 30min until abundant porphyrize and mixing, shift out glove box;
4) select the mould for tabletting press of 0.25 inch of internal diameter, the sample of different urea content is pressed into disk at 30MPa respectively;
5) wafer sample of compacting is put into alumina crucible respectively, put into retort furnace and sinter, sinter out the column sodium metaaluminate embryo that diameter is 0.25 inch;
6) bulk alloy ingot is put into spray to cast container, spray to cast container is the silica tube of a bottom perforate; Then revolve with single roller stove of quenching and carry out copper mold spray to cast, the column sodium metaaluminate embryo sintered out is put into the hole of copper mold, copper mold is placed on below silica tube, make the hole being placed with sodium metaaluminate embryo aim at silica tube bottom end opening, be evacuated to 2*10
-2pa ~ 2*10
-3pa, passes into 50kPa argon gas and does protective atmosphere, pass into argon gas post-heating in silica tube, is incubated 30s ~ 60s after reaching 1300 DEG C ~ 1400 DEG C, is ejected in the sodium metaaluminate embryo in copper mold, obtains the Fe containing sodium metaaluminate
73ga
27alloy bar;
7) by the Fe containing sodium metaaluminate
73ga
27alloy bar is put into and the container that volumetric concentration is the hydrochloric acid soln of 3% is housed, and container is put into ultrasonic generator, is ultrasonic immersion treatment under the condition of 40kHz in ultrasonic frequency, and ultrasonic soak time calculates by every 1mm alloy bar 10min; Taken out by alloy bar after ultrasonic immersion and put into distilled water ultrasonic cleaning 3 times under 40kHz ultrasonic frequency, each scavenging period calculates by the length cleaning 5min of every 1mm alloy bar; Finally that material is centrifugal under rotating speed is 1000 turns/min condition; Finally obtain high-performance macroscopic bubbles state Fe
73ga
27magnetostriction materials.
Sintering process in described step 5) is: be first raised to 220 DEG C from 20 DEG C with 20min, insulation 180min, urea is fully evaporated in sodium metaaluminate embryo, forms hole, then 1500 DEG C of insulation 180min are raised to through 150min, the sodium metaaluminate embryo of porous is fully sintered, finally drops to 200 DEG C from 1500 DEG C with 180min.
Described silica tube bottom aperture diameter is 0.7mm
Described copper mold bore dia is 7mm, obtains the alloy bar that diameter is 7mm.
The invention has the advantages that: the macroscopic bubbles state Fe developed
73ga
27magnetostriction materials have excellent Magnetostriction; The macroscopic bubbles state Fe developed
73ga
27magnetostriction materials only need low driving field, can use under low externally-applied magnetic field; The macroscopic bubbles state Fe developed
73ga
27magnetostriction materials have good mechanical property and erosion resistance, can use in the presence of a harsh environment; Adopt the foam state Fe that method of the present invention is obtained
73ga
27magnetostriction materials porous nickel, magnetostriction coefficient is high, can reach 300ppm, and simple process, yield rate high, be conducive to applying.
Accompanying drawing explanation
Fig. 1 is the foam Fe of porosity 33.65%
74ga
27magnetostriction materials and Fe
74ga
27the Magnetostriction curve of block materials.
Fig. 2 is the foam Fe of porosity 47.88%
74ga
27magnetostriction materials and Fe
74ga
27the Magnetostriction curve of block materials.
Fig. 3 is the comparison diagram for embodiment 1, embodiment 2 and block materials Magnetostriction curve.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
A kind of high-performance macroscopic bubbles state Fe
73ga
27magnetostriction materials are macroscopic bubbles state shape, and its pore size is 20-100 μm, and porosity is 30%-50%.
Described high-performance macroscopic bubbles state Fe
73ga
27the preparation technology of magnetostriction materials is:
1) add scaling loss amount by described composition to prepare burden: use vacuum non-consumable arc furnace smelting nut alloy, 4*10 is evacuated to vacuum non-consumable arc-melting furnace
-3~ 5*10
-3pa, after pouring 10kPa ar purging, then suction is to 2*10
-3~ 3*10
-3pa; The volume percent purity of argon gas is 99.99%.Then being filled with argon gas melting to vacuum tightness is 40kPa ~ 50kPa, batching is melted under melting electric current 100A ~ 150A, and smelting time is 3min ~ 5min, melt back 4 ~ 5 times, obtained alloy pig,
2) alloy pig molybdenum filament wire cutting machine step 1 melted out cuts into the bulk of 6mm*6mm*10mm, is ground off to ensure non-scale in alloy block surface with sand paper, with ethanol, alloy block surface cleaning is clean, keeps dry state;
3) sodium metaaluminate and urea, mortar are moved to glove box, to ensure that sodium metaaluminate when preparing does not absorb water, weigh the mixture of 20g sodium metaaluminate and urea, in mixture, mass percent shared by urea is 40% ~ 60%, after urea and sodium metaaluminate mix with mortar grinder 30min until abundant porphyrize and mixing, shift out glove box;
4) select the mould for tabletting press of 0.25 inch of internal diameter, the sample of different urea content is pressed into disk at 30MPa respectively;
5) wafer sample of compacting is put into alumina crucible respectively, put into retort furnace and sinter, sinter out the column sodium metaaluminate embryo that diameter is 0.25 inch;
6) bulk alloy ingot is put into spray to cast container, spray to cast container is the silica tube of a bottom perforate; Then revolve with single roller stove of quenching and carry out copper mold spray to cast, the column sodium metaaluminate embryo sintered out is put into the hole of copper mold, copper mold is placed on below silica tube, make the hole being placed with sodium metaaluminate embryo aim at silica tube bottom end opening, be evacuated to 2*10
-2pa ~ 2*10
-3pa, passes into 50kPa argon gas and does protective atmosphere, pass into argon gas post-heating in silica tube, is incubated 30s ~ 60s after reaching 1300 DEG C ~ 1400 DEG C, is ejected in the sodium metaaluminate embryo in copper mold, obtains the Fe containing sodium metaaluminate
73ga
27alloy bar;
7) by the Fe containing sodium metaaluminate
73ga
27alloy bar is put into and the container that volumetric concentration is the hydrochloric acid soln of 3% is housed, and container is put into ultrasonic generator, is ultrasonic immersion treatment under the condition of 40kHz in ultrasonic frequency, and ultrasonic soak time calculates by every 1mm alloy bar 10min; Taken out by alloy bar after ultrasonic immersion and put into distilled water ultrasonic cleaning 3 times under 40kHz ultrasonic frequency, each scavenging period calculates by the length cleaning 5min of every 1mm alloy bar; Finally that material is centrifugal under rotating speed is 1000 turns/min condition; Finally obtain high-performance macroscopic bubbles state Fe
73ga
27magnetostriction materials.
Sintering process in described step 5) is: be first raised to 220 DEG C from 20 DEG C with 20min, insulation 180min, urea is fully evaporated in sodium metaaluminate embryo, forms hole, then 1500 DEG C of insulation 180min are raised to through 150min, the sodium metaaluminate embryo of porous is fully sintered, finally drops to 200 DEG C from 1500 DEG C with 180min.
Described silica tube bottom aperture diameter is 0.7mm
Described copper mold bore dia is 7mm, obtains the alloy bar that diameter is 7mm.
embodiment 1:preparation porosity is the foam Fe of 33.65%
73ga
27alloy
Get the raw material needed for design mix with electronic balance scale, and add the Ga scaling loss amount of 3wt%, gross weight 40g, wherein use the Fe of the purity 99.99% and Ga of 99.99%, the raw material prepared is put into vacuum non-consumable arc-melting furnace.
5*10 is evacuated to vacuum non-consumable arc-melting furnace
-3pa, after pouring 10kPa ar purging, then suction is to 3*10
-3pa; The volume percent purity of argon gas is 99.99%.
Then being filled with argon gas melting to vacuum tightness is 50kPa, melts in melting electric current 100A ~ 150A decline batching, and smelting time is 5min, melt back 5 times, obtained alloy pig.
Melting is for 5 times to ensure alloy pig homogeneity of ingredients.
Alloy pig molybdenum filament wire cutting machine is processed into 6mm*6mm*10mm rectangular parallelepiped dress sample
Alloy sample is put into ethanol, and under the condition of 50kHz, ultrasonic cleaning 10min, puts into baking oven and dry 30min under 80 DEG C of condition, obtain clean sample after cleaning.
Sodium metaaluminate and urea, mortar etc. move to glove box, and to ensure that sodium metaaluminate when preparing does not absorb water, the urea quality by 40% is than the sample weighing 20g gross weight.After urea and sodium metaaluminate mix with mortar grinder 30min until abundant porphyrize and mixing, shift out glove box;
Select the mould for tabletting press of 0.25 inch of internal diameter, the sample of 40% urea content is pressed into disk at 30MPa;
The wafer sample of compacting is put into alumina crucible respectively, put into retort furnace to sinter, first be raised to 220 DEG C from 20 DEG C with 20min, insulation 180min, urea is fully evaporated in sodium metaaluminate embryo, forms hole, be then raised to 1500 DEG C of insulation 180min through 150min, the sodium metaaluminate embryo of porous is fully sintered, finally drop to 200 DEG C from 1500 DEG C with 180min, sinter out the column sodium metaaluminate embryo that diameter is 0.25 inch;
Bulk alloy ingot is put into spray to cast container, and spray to cast container is the silica tube of a bottom perforate; Then revolve with single roller stove of quenching and carry out copper mold spray to cast, the sodium metaaluminate column embryo sintered out is put into the hole of copper mold.Copper mold is placed on below silica tube, makes the hole being placed with sodium metaaluminate embryo aim at silica tube bottom end opening, be evacuated to 3*10
-3pa, pass into 50kPa argon gas and do protective atmosphere, pass into argon gas post-heating in silica tube, alloy solution is incubated 40s after reaching 1350 DEG C, is ejected in the sodium metaaluminate embryo in copper mold, obtains the alloy bar containing sodium metaaluminate.
Being put into by alloy bar containing sodium metaaluminate and the container that volumetric concentration is the hydrochloric acid soln of 3% is housed, container is put into ultrasonic generator, is ultrasonic immersion treatment under the condition of 40kHz in ultrasonic frequency, and ultrasonic soak time calculates by every 1mm alloy bar 10min; Taken out by alloy bar after ultrasonic immersion and put into distilled water ultrasonic cleaning 3 times under 40kHz ultrasonic frequency, each scavenging period calculates by the length cleaning 5min of every 1mm alloy bar; Finally that material is centrifugal under rotating speed is 1000 turns/min condition.
Fig. 1 is the foam Fe of porosity 33.65%
74ga
27the Magnetostriction curve of magnetostriction materials and block materials, foam Fe
74ga
27the maximum magnetostriction coefficient of magnetostriction materials is 319ppm.
embodiment 2:preparation porosity is the foam Fe of 47.88%
73ga
27alloy
Get the raw material needed for design mix with electronic balance scale, and add the Ga scaling loss amount of 3wt%, gross weight 40g, wherein use the Fe of the purity 99.99% and Ga of 99.99%, the raw material prepared is put into vacuum non-consumable arc-melting furnace.
5*10 is evacuated to vacuum non-consumable arc-melting furnace
-3pa, after pouring 10kPa ar purging, then suction is to 3*10
-3pa; The volume percent purity of argon gas is 99.99%.
Then being filled with argon gas melting to vacuum tightness is 50kPa, melts in melting electric current 100A ~ 150A decline batching, and smelting time is 5min, melt back 5 times, obtained alloy pig.
Melting is for 5 times to ensure alloy pig homogeneity of ingredients.
Alloy pig molybdenum filament wire cutting machine is processed into 6mm*6mm*10mm rectangular parallelepiped dress sample
Alloy sample is put into ethanol, and under the condition of 50kHz, ultrasonic cleaning 10min, puts into baking oven and dry 30min under 80 DEG C of condition, obtain clean sample after cleaning.
Sodium metaaluminate and urea, mortar etc. move to glove box, and to ensure that sodium metaaluminate when preparing does not absorb water, the urea quality by 60% is than the sample weighing 20g gross weight.After urea and sodium metaaluminate mix with mortar grinder 30min until abundant porphyrize and mixing, shift out glove box;
Select the mould for tabletting press of 0.25 inch of internal diameter, the sample of 60% urea content is pressed into disk at 30MPa;
The wafer sample of compacting is put into alumina crucible respectively, put into retort furnace to sinter, first be raised to 220 DEG C from 20 DEG C with 20min, insulation 180min, urea is fully evaporated in sodium metaaluminate embryo, forms hole, be then raised to 1500 DEG C of insulation 180min through 150min, the sodium metaaluminate embryo of porous is fully sintered, finally drop to 200 DEG C from 1500 DEG C with 180min, sinter out the column sodium metaaluminate embryo that diameter is 0.25 inch;
Bulk alloy ingot is put into spray to cast container, and spray to cast container is the silica tube of a bottom perforate; Then revolve with single roller stove of quenching and carry out copper mold spray to cast, the sodium metaaluminate column embryo sintered out is put into the hole of copper mold.Copper mold is placed on below silica tube, makes the hole being placed with sodium metaaluminate embryo aim at silica tube bottom end opening, be evacuated to 3*10
-3pa, pass into 50kPa argon gas and do protective atmosphere, pass into argon gas post-heating in silica tube, alloy solution is incubated 40s after reaching 1350 DEG C, is ejected in the sodium metaaluminate embryo in copper mold, obtains the alloy bar containing sodium metaaluminate.
Being put into by alloy bar containing sodium metaaluminate and the container that volumetric concentration is the hydrochloric acid soln of 3% is housed, container is put into ultrasonic generator, is ultrasonic immersion treatment under the condition of 40kHz in ultrasonic frequency, and ultrasonic soak time calculates by every 1mm alloy bar 10min; Taken out by alloy bar after ultrasonic immersion and put into distilled water ultrasonic cleaning 3 times under 40kHz ultrasonic frequency, each scavenging period calculates by the length cleaning 5min of every 1mm alloy bar; Finally that material is centrifugal under rotating speed is 1000 turns/min condition.
Fig. 2 is the foam Fe of porosity 47.88%
74ga
27the Magnetostriction curve of magnetostriction materials and block materials, its maximum magnetostriction coefficient is 301ppm.
Fig. 3 is the comparison diagram for embodiment 1, embodiment 2 and block materials Magnetostriction curve.
Claims (5)
1. a high-performance macroscopic bubbles state Fe
73ga
27magnetostriction materials, is characterized in that: Fe
73ga
27magnetostriction materials are macroscopic bubbles state shape, and its pore size is 20-100 μm, and porosity is 30%-50%.
2. a high-performance macroscopic bubbles state Fe according to claim 1
73ga
27the preparation technology of magnetostriction materials, is characterized in that:
1) add scaling loss amount by described composition to prepare burden: use vacuum non-consumable arc furnace smelting nut alloy, 4*10 is evacuated to vacuum non-consumable arc-melting furnace
-3~ 5*10
-3pa, after pouring 10kPa ar purging, then suction is to 2*10
-3~ 3*10
-3pa; The volume percent purity of argon gas is 99.99%;
Then being filled with argon gas melting to vacuum tightness is 40kPa ~ 50kPa, batching is melted under melting electric current 100A ~ 150A, and smelting time is 3min ~ 5min, melt back 4 ~ 5 times, obtained alloy pig,
2) alloy pig molybdenum filament wire cutting machine step 1 melted out cuts into the bulk of 6mm*6mm*10mm, is ground off to ensure non-scale in alloy block surface with sand paper, with ethanol, alloy block surface cleaning is clean, keeps dry state;
3) sodium metaaluminate and urea, mortar are moved to glove box, to ensure that sodium metaaluminate when preparing does not absorb water, weigh the mixture of 20g sodium metaaluminate and urea, in mixture, mass percent shared by urea is 40% ~ 60%, after urea and sodium metaaluminate mix with mortar grinder 30min until abundant porphyrize and mixing, shift out glove box;
4) select the mould for tabletting press of 0.25 inch of internal diameter, the sample of different urea content is pressed into disk at 30MPa respectively;
5) wafer sample of compacting is put into alumina crucible respectively, put into retort furnace and sinter, sinter out the column sodium metaaluminate embryo that diameter is 0.25 inch;
6) bulk alloy ingot is put into spray to cast container, spray to cast container is the silica tube of a bottom perforate; Then revolve with single roller stove of quenching and carry out copper mold spray to cast, the column sodium metaaluminate embryo sintered out is put into the hole of copper mold, copper mold is placed on below silica tube, make the hole being placed with sodium metaaluminate embryo aim at silica tube bottom end opening, be evacuated to 2*10
-2pa ~ 2*10
-3pa, passes into 50kPa argon gas and does protective atmosphere, pass into argon gas post-heating in silica tube, is incubated 30s ~ 60s after reaching 1300 DEG C ~ 1400 DEG C, is ejected in the sodium metaaluminate embryo in copper mold, obtains the Fe containing sodium metaaluminate
73ga
27alloy bar;
7) by the Fe containing sodium metaaluminate
73ga
27alloy bar is put into and the container that volumetric concentration is the hydrochloric acid soln of 3% is housed, and container is put into ultrasonic generator, is ultrasonic immersion treatment under the condition of 40kHz in ultrasonic frequency, and ultrasonic soak time calculates by every 1mm alloy bar 10min; Taken out by alloy bar after ultrasonic immersion and put into distilled water ultrasonic cleaning 3 times under 40kHz ultrasonic frequency, each scavenging period calculates by the length cleaning 5min of every 1mm alloy bar; Finally that material is centrifugal under rotating speed is 1000 turns/min condition; Finally obtain high-performance macroscopic bubbles state Fe
73ga
27magnetostriction materials.
3. preparation technology according to claim 2, it is characterized in that the sintering process in described step 5) is: be first raised to 220 DEG C from 20 DEG C with 20min, insulation 180min, urea is fully evaporated in sodium metaaluminate embryo, forms hole, then 1500 DEG C of insulation 180min are raised to through 150min, the sodium metaaluminate embryo of porous is fully sintered, finally drops to 200 DEG C from 1500 DEG C with 180min.
4. preparation technology according to claim 2, is characterized in that the silica tube bottom aperture diameter in described step 6) is 0.7mm.
5. preparation technology according to claim 2, is characterized in that the diameter in the hole of the copper mold in described step 6) is 7mm, obtains the alloy bar that diameter is 7mm.
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| CN109023505A (en) * | 2018-08-27 | 2018-12-18 | 北京航空航天大学 | A method of utilizing unidirectional solidification stress regulation and control FeGa magnetostriction alloy magnetic domain |
| CN107723579B (en) * | 2017-09-13 | 2019-08-13 | 西安交通大学 | A kind of method and material obtaining low driving field large magneto-strain magnetostriction materials |
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