CN108242501B - Magnetostrictive device and preparation method thereof - Google Patents

Magnetostrictive device and preparation method thereof Download PDF

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CN108242501B
CN108242501B CN201611226594.3A CN201611226594A CN108242501B CN 108242501 B CN108242501 B CN 108242501B CN 201611226594 A CN201611226594 A CN 201611226594A CN 108242501 B CN108242501 B CN 108242501B
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core
magnetostrictive
strip
winding
belt
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CN108242501A (en
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罗阳
谢佳君
彭海军
于敦波
闫文龙
权宁涛
杨远飞
豆亚坤
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Grirem Advanced Materials Co Ltd
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    • H10N35/00—Magnetostrictive devices
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    • H10N35/00—Magnetostrictive devices
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Abstract

The magnetostrictive device is characterized in that the magnetostrictive strip core is of a columnar structure, a spiral loop is arranged on the relative section of the magnetostrictive strip core, and an induction coil generating a magnetic field is wound in the outer circumferential direction of the strip core; the magnetostrictive belt core is formed by winding a flat belt material, and the lamination coefficient N is 75-85%. The magnetostrictive device can reduce the eddy current loss of the magnetostrictive material under high frequency, improve the actuating precision of the magnetostrictive material and widen the application field of the material; meanwhile, the utilization efficiency of the rapid quenching magnetostrictive material is also improved.

Description

Magnetostrictive device and preparation method thereof
Technical Field
The invention relates to a magnetostrictive device and a preparation method thereof, belonging to the field of magnetic material devices.
Background
The Fe-Ga alloy is a novel magnetostrictive material, and compared with the traditional Terfenol-D, the Fe-Ga alloy has the biggest characteristics of lower saturation magnetic field and higher mechanical strength, the saturation field is only 8-17kA/m and is about 1/10 of the Terfenol-D, and the magnetic field sensitivity is high. In some applications, a complex pre-stress structure is not needed, and the structural design of the device is relatively simple. The Fe-Ga alloy is a metal solid solution, has high strength and small brittleness, has higher tensile strength (500MPa) and ductility, and is particularly suitable for severe conditions with strong vibration, impact, large load and strong corrosion. In addition, the alloy has high magnetic permeability, high Curie temperature and good temperature characteristic, can be used in a wide temperature range, and therefore has good application prospect in the aspects of sensors and actuators.
The saturation magnetostriction coefficient of the Fe-Ga alloy prepared by the traditional directional solidification method is only 200-300ppm, which is far less than 2000ppm of Terfenol-D. In addition, since the Fe — Ga alloy has high electrical conductivity, large eddy current loss occurs when the bulk material of the alloy is used under high frequency conditions. These limit the application range, so improving the magnetostriction performance of the Fe-Ga alloy and reducing the eddy current loss in service become one of the key factors for the application.
In order to solve the problems, because the FeGa alloy has better ductility, in practical application, the Fe-Ga alloy can be made into a nanocrystalline strip with a very thin thickness by adopting a rapid quenching or rolling method. Therefore, the eddy current loss of the material under high frequency can be greatly reduced, and the application range of the material is expanded.
For example, chinese patent application CN 103320682A proposes to prepare Fe by melt rapid quenching100-x-yGaxMyThe material adopts a copper crucible method to obtain a rapid quenching thin strip. The chinese patent application CN 103556045A proposes a pseudo binary system material of FeGa and TbDyFe, and adopts the anisotropic compensation principle to obtain a rapid quenching FeGa material with large magnetic strain, low driving field and high mechanical property. Chinese patent application CN 105177227A proposes a rapid quenching FeGa material.
However, in practical applications, how to apply the thin-strip-shaped FeGa material, fully utilize its large magnetostriction characteristics, and improve its magnetostriction characteristics and precision actuation stability at high frequency is still a great technical problem.
Disclosure of Invention
In order to solve the above technical problems, the inventors propose a novel magnetostrictive bulk device and a method for manufacturing the same. The device has high magnetostriction coefficient and low eddy current loss.
In order to achieve the above purpose, in one aspect, the invention adopts the following technical scheme: a magnetostrictive device comprises a magnetostrictive strip core, and is characterized in that the magnetostrictive strip core is of a columnar structure, a spiral loop is arranged on the relative section of the magnetostrictive strip core, and an induction coil generating a magnetic field is wound in the outer circumferential direction of the strip core; the magnetostrictive belt core is formed by winding a flat belt material, and the lamination coefficient N is 75-85%.
In the actual use process, the induction coil is electrified to generate a magnetic field, and the magnetostrictive strip core in the coil generates magnetostriction under the action of the magnetic field.
The traditional method is a lamination method, namely, magnetostrictive sheets prepared by a rapid quenching method or a rolling method are stacked together, and the method has low material utilization rate. More importantly, when a magnetic field is applied, the magnetic field is difficult to ensure to be uniformly distributed on the material, so that the magnetic field applied to each lamination is uneven, the expansion and contraction are inconsistent, and precise actuating control is difficult to achieve.
In the invention, because the coil is annular, the magnetic field is uniformly distributed in the annular, and under the condition, the magnetostrictive strip core is prepared by a winding method, so that the uniform magnetic field distribution and the uniform expansion and contraction of each spiral loop can be achieved, and the more precise control can be realized.
Therefore, the magnetostrictive core is formed by winding a flat strip. In the invention, the preferred preparation mode of the flat strip is a rapid quenching method, the method is obtained by spreading molten alloy steel on a rotating roller wheel for rapid cooling, and the method not only can effectively inhibit the segregation of alloy components, but also is beneficial to the precise control of the width and the thickness of the magnetostrictive strip, thereby achieving the high consistency of the strip core after winding.
The magnetostrictive strip core prepared by the rapid quenching method forms a columnar structure through winding, and has a spiral loop relative to the section.
The magnetostrictive device according to the foregoing, wherein the lamination factor N is an effective area factor of the tape core, which is calculated by measuring an inner diameter D1, an outer diameter D2, a number N of spiral loops and a thickness D of the tape core, according to the following formula:
Figure GDA0002983325640000021
the higher the lamination factor, the larger the effective area of the tape core. Advantageously, the lamination factor of the spiral circuit is 75-85%. The lamination coefficient is lower than 75%, which shows that the spiral loop in the belt core is not uniformly distributed, and the final precision actuation effect is influenced, and the lamination coefficient is too high, so that on one hand, great trouble is brought to the manufacturing, and on the other hand, the service performance under high frequency is also influenced.
The magnetostrictive device according to the foregoing, wherein the magnetostrictive strip core contains Fe as a main component100-x-yGaxMyM is one or more of Al, Ni, Co, Si, B, La, Y and Ce, wherein x is more than or equal to 5 and less than or equal to 25, and Y is more than or equal to 0 and less than or equal to 10, which are mass ratios.
Compared with the traditional Terfenol-D, the FeGa material has the biggest characteristics of lower saturation magnetic field and higher mechanical strength, the saturation field is as low as 8-17kA/m and is about 1/10 of the Terfenol-D, and the magnetic field sensitivity is high. In some applications, a complex prestress structure is not needed, the structural design of the device is relatively simple, and meanwhile, the Fe-Ga alloy is a metal solid solution, so that the device is high in strength, small in brittleness, high in tensile strength (500MPa) and ductility, and particularly suitable for severe conditions with strong vibration, impact, large load and strong corrosion.
The magnetostrictive device according to the foregoing, wherein the magnetostrictive core is prepared from a main component by a rapid quenching method. The FeGa material prepared by the rapid quenching method is beneficial to exerting the advantages of the mechanical property of the FeGa material, and the prepared FeGa material has the thickness of only about 1/10 of a rolled strip, thereby being more beneficial to exerting the service performance of the FeGa material under high frequency.
In the FeGa component of the invention, x is more than or equal to 5 and less than or equal to 25, and y is more than or equal to 0 and less than or equal to 10, which are mass ratios. In the composition range, a single A2 phase alloy is obtained, and the occurrence of ordered phases such as DO3, DO19, L12 and the like is avoided. The single phase is beneficial to obtaining higher magnetostriction performance. The addition of a certain amount of the third component M can keep the basic structural property of the Fe-Ga alloy and improve the magnetostriction property, the Curie temperature, the machining property and the like of the alloy, wherein the addition of Al and Ni can improve the machining property of the material, improve the ductility of the rapid-quenched flat strip and improve the flatness of the strip; the addition of Co can improve the temperature property; the addition of Si and B can improve the stability of rapid quenching, reduce the surface roughness of the strip and facilitate the formation of a single A2 structure; the addition of La, Y and Ce can improve the soft magnetic property of the material and improve the magnetic stability of the material under high frequency. The content of M is in the range of 0-10 wt.%, wherein y ═ 0 represents a single FeGa material, and M content higher than 10 wt.% causes significant decrease in magnetostriction performance.
The magnetostrictive device according to the above, wherein the flat strip has a thickness of 50 to 150 μm and a width of more than 10 mm.
Advantageously, in the magnetostrictive core, the flat strip has a thickness of 50 to 150 μm and a width greater than 10 mm. The thickness within the range is beneficial to improving the high-frequency performance of the magnetostrictive device, but the thickness of the flat strip is less than 50 mu m, which causes difficulty in preparation, the flatness of the flat strip is poor, the lamination coefficient is low, and the thickness of the flat strip more than 150 mu m is not beneficial to the service performance under high frequency. Generally, in order to achieve the use effect of the device, the width of the strip material is more than 10mm, and the strip material can be cut moderately according to the specific use size.
The magnetostrictive device according to the foregoing, wherein an insulating adhesive is filled between the spiral loops of the magnetostrictive strip core.
The existence of the insulating binder further reduces the eddy current loss of the magnetostrictive device under high frequency, reduces the heating of the device and improves the application stability and precision of the device.
The magnetostrictive device according to the previous paragraph, wherein the insulating adhesive is selected from epoxy resins.
According to the aforementioned magnetostrictive device, in which the magnetic field distribution in the device is required to be uniform in order to further improve the actuation accuracy of the magnetostrictive device, it is advantageous to further add a soft magnetic material in the band core portion for the purpose of forming a magnetic circuit.
The magnetostrictive device according to the foregoing, wherein the soft magnetic material comprises a FeNi powder core, a fesai powder core, a FeNiMo powder core, an iron powder core, a ferrite powder core.
In another aspect, the present invention also provides a method for preparing the magnetostrictive device, which comprises the following steps:
(1) preparing a flat strip: spraying molten alloy solution onto a rotating roller by an induction spray casting method, and rapidly cooling to prepare a flat strip;
(2) winding: extruding and winding the flat strip material to form a belt winding body, namely a belt core, wherein the belt core is a spiral loop;
(3) preparing a coil: and winding an induction coil outside the strip core to obtain the magnetostrictive device.
The method according to the above, wherein, after the step (2), a dipping process is included; in this step, the tape wound body is immersed in the molten insulating adhesive, and the adhesive is filled between the spiral loops.
The method according to the above, wherein, after the step (2), a heat treatment process is included; the process comprises heat-treating the extruded tape wound body at 50 to 300 ℃.
Compared with the prior art, the invention has the following advantages:
on one hand, the magnetostrictive device can reduce the eddy current loss of the magnetostrictive material under high frequency, improve the actuating precision of the magnetostrictive material and widen the application field of the material; on the other hand, the utilization efficiency of the rapid quenching magnetostrictive material is also improved.
Drawings
Fig. 1 is a schematic view of a magnetostrictive tape core in accordance with the invention.
Detailed Description
The invention will be further illustrated with reference to specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications can be made by those skilled in the art after reading the contents of the present invention, and those equivalents also fall within the scope of the invention defined by the appended claims.
The following examples will aid understanding of the present invention, but are not intended to limit the scope of the present invention.
Examples
The magnetostrictive device is mainly obtained by the following method:
(1) flat strip production
And spraying the molten alloy melt onto a rotating roller by an induction spray casting method to rapidly cool to prepare the flat strip.
In this preparation, the strip composition, thickness d (in μm), width W (in mm) are shown in table 1.
The material composition is measured by ICP, and the thickness and width are measured by a micrometer screw.
(2) Winding of
The flat strip is extruded and wound to form a ribbon winding, which is a helical loop.
After winding, the lamination coefficient of the magnetostrictive belt core can be measured, and the lamination coefficient N can be calculated by measuring the inner diameter D1, the outer diameter D2 and the number N of spiral loop sheets of the belt core in the invention as follows:
Figure GDA0002983325640000051
(3) coil preparation
And winding an induction coil outside the strip core to obtain the magnetostrictive device.
The coil is a copper enameled wire, and the number of turns and the diameter of the copper wire are preferably 70-95% of the width of the belt core.
In order to further improve the high-frequency application characteristics of the magnetostrictive material, the following steps of dipping and heat treatment are added.
Gum dipping: the tape winding is immersed in the molten insulating adhesive so that the adhesive is filled between the spiral loops.
And (3) heat treatment: and carrying out heat treatment on the extruded winding body within the range of 50-300 ℃.
The loss P (in W/kg) and magnetostriction coefficient λ of the final device are also shown in Table 1.
TABLE 1 magnetostrictive device compositions and Properties
Serial number Composition (I) d W N Thermal treatment P λ
1 Fe83Ga17 150 15 85％ 300 48 228
2 Fe82Ga16Al4 120 12 80％ 50 39 219
3 Fe80Ga15Co5 80 13 75％ 250 30 230
4 Fe75Ga20B5 120 20 82％ 250 41 218
5 Fe78Ga19Y3 130 25 81％ 250 45 220
6 Fe74Ga18Al2B6 50 15 85％ 250 23 201
7 Fe70Ga20B8Y2 70 19 79％ 250 27 220
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims (8)

1. A magnetostrictive device comprises a magnetostrictive strip core, and is characterized in that the magnetostrictive strip core is of a columnar structure, a spiral loop is arranged on the relative section of the magnetostrictive strip core, and an induction coil generating a magnetic field is wound in the outer circumferential direction of the strip core; a soft magnetic material is added in the core part of the magnetostrictive strip core; the magnetostrictive belt core is formed by winding a flat belt material and has a lamination coefficientN75% -85%; the soft magnetic material comprises a FeNi powder core, a FeSiAl powder core, a FeNiMo powder core, an iron powder core and a ferrite powder core; the thickness of the flat strip is 50-150 mu m, and the width of the flat strip is more than 10 mm;
lamination factorNBy measuring the internal diameter of the tape core for the effective area factor of the tape coreD1Outer diameter ofD2Number of spiral loopnThickness ofdCalculated by the following formula:
Figure 20153DEST_PATH_IMAGE002
。
2. the method of claim 1Characterized in that the magnetostrictive core mainly contains Fe100-x-yGaxMyM is one or more of Al, Ni, Co, Si, B, La, Y and Ce, wherein x is more than or equal to 5 and less than or equal to 25, and Y is more than or equal to 0 and less than or equal to 10, which are mass ratios.
3. The magnetostrictive device according to claim 1, characterized in that the magnetostrictive core is produced with a rapid quenching method as its main component.
4. The magnetostrictive device according to claim 1, characterized in that the helical loops of the magnetostrictive strip core are filled with an insulating adhesive between them.
5. The magnetostrictive device according to claim 4, characterized in that the insulating adhesive comprises epoxy.
6. A method of making a magnetostrictive device according to any one of claims 1-5, characterized in that it comprises the steps of:
(1) preparing a flat strip: spraying molten alloy solution onto a rotating roller by an induction spray casting method, and rapidly cooling to prepare a flat strip;
(2) winding: extruding and winding the flat strip material to form a belt winding body, namely a belt core, wherein the belt core is a spiral loop;
(3) preparing a coil: and winding an induction coil outside the strip core to obtain the magnetostrictive device.
7. The method of claim 6, wherein after step (2), a dip process is included; in this step, the tape wound body is immersed in the molten insulating adhesive, and the adhesive is filled between the spiral loops.
8. The method of claim 6, wherein after step (2), comprising a heat treatment step; the process comprises heat-treating the extruded tape wound body at 50 to 300 ℃.
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ZA2017/08492A ZA201708492B (en) 2016-12-27 2017-12-14 A magnetostrictive device and the preparation method thereof
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CN108242501B (en) * 2016-12-27 2022-02-22 有研稀土新材料股份有限公司 Magnetostrictive device and preparation method thereof
CN115415514B (en) * 2022-08-26 2024-04-09 清华大学 Magnetostrictive composite material and preparation method thereof

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JPH0360176A (en) * 1989-07-28 1991-03-15 Tdk Corp Magnetostriction element
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CN103320682A (en) * 2013-02-28 2013-09-25 瑞科稀土冶金及功能材料国家工程研究中心有限公司 High-performance quick-quenching Fe-Ga based magnetostriction thin strip material and preparation technology thereof
CN108242501A (en) * 2016-12-27 2018-07-03 有研稀土新材料股份有限公司 magnetostrictive device and preparation method thereof
CN110513658A (en) * 2019-05-14 2019-11-29 一码一路（海南）人工智能有限公司 Environmental protection and energy saving coloured silk leaf street lamp setting method

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JPH0360176A (en) * 1989-07-28 1991-03-15 Tdk Corp Magnetostriction element
JPH1180908A (en) * 1997-09-05 1999-03-26 Hitachi Metals Ltd Magnetic alloy excellent in surface property and magnetic core using it
CN103320682A (en) * 2013-02-28 2013-09-25 瑞科稀土冶金及功能材料国家工程研究中心有限公司 High-performance quick-quenching Fe-Ga based magnetostriction thin strip material and preparation technology thereof
CN108242501A (en) * 2016-12-27 2018-07-03 有研稀土新材料股份有限公司 magnetostrictive device and preparation method thereof
CN110513658A (en) * 2019-05-14 2019-11-29 一码一路（海南）人工智能有限公司 Environmental protection and energy saving coloured silk leaf street lamp setting method

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