CN116478540A - Composite material with flexibility and magnetostriction performance as well as preparation method and application thereof - Google Patents
Composite material with flexibility and magnetostriction performance as well as preparation method and application thereof Download PDFInfo
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- CN116478540A CN116478540A CN202310448039.9A CN202310448039A CN116478540A CN 116478540 A CN116478540 A CN 116478540A CN 202310448039 A CN202310448039 A CN 202310448039A CN 116478540 A CN116478540 A CN 116478540A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 18
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- 239000011368 organic material Substances 0.000 claims abstract description 11
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- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 26
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- 239000002245 particle Substances 0.000 claims description 18
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- 229910052771 Terbium Inorganic materials 0.000 claims description 14
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- 238000000498 ball milling Methods 0.000 claims description 6
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- 238000004519 manufacturing process Methods 0.000 claims description 6
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- 229910052786 argon Inorganic materials 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
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- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 3
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- 229920005570 flexible polymer Polymers 0.000 description 1
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- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J11/00—Manipulators not otherwise provided for
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/01—Magnetic additives
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Robotics (AREA)
- Mechanical Engineering (AREA)
- Hard Magnetic Materials (AREA)
Abstract
The invention provides a preparation method and application of a composite material with flexibility and magnetostriction performance, and belongs to the field of magnetostriction materials. The material is formed by compounding a magnetic material and a flexible organic material. The material has good flexibility and shape memory effect. Shows magnetostriction effect under the action of external magnetic field and responds to external magnetic field rapidly. Under the action of 2T magnetic field, the magnetostriction amplitude near room temperature can reach 400ppm. Along with the change of the content and the components of the magnetic particles, the magnetostriction performance of the material can be adjusted in a wide temperature range near room temperature. The preparation method of the magnetic drive flexible composite material is simple, and the problem of poor mechanical property of the magnetostrictive material is effectively solved.
Description
Technical Field
The invention relates to a magnetic functional material, in particular to a composite material with flexibility and magnetostriction performance, and a preparation method and application thereof.
Background
Under the action of an external magnetic field, the magnetostrictive material can be shortened or lengthened in a certain direction, so that displacement work is performed. The material can convert electromagnetic energy (or electromagnetic information) into mechanical energy or acoustic energy (or mechanical displacement information or acoustic information) by repeatedly stretching and shrinking under the action of alternating magnetic fields so as to generate vibration or acoustic waves. Conversely, magnetostrictive materials can also convert mechanical energy (or mechanical displacement and information) into electromagnetic energy (or electromagnetic information), which is an important energy and information conversion functional material. Magnetostrictive materials have wide application prospects in the high technical fields of sonar underwater acoustic transducer technology, electroacoustic transducer technology, ocean detection and development technology, micro-displacement driving, vibration reduction and vibration prevention, noise reduction and noise prevention systems, intelligent wings, robots, automation technology, fuel injection technology, valves, pumps, fluctuation oil production and the like.
The main mechanism of magnetostriction phenomenon is the twin boundary motion in the martensite phase, and in order to fully utilize the above characteristics, single crystals are generally required. The magnetostriction performance of the polycrystalline material is greatly reduced. However, the growth of single crystals is rather cumbersome and high quality crystals can only be obtained with limited limits at a rather high price. In addition, the materials with large magnetostriction coefficients which are found at present all have the characteristics of poor mechanical properties and easy fracture, which greatly limits the application of the magnetostriction materials.
In recent years, with the development of artificial intelligence technology, flexible robots have received a great deal of attention in biomedical fields such as bionics, drug delivery, remote control, and the like. Mechanical flexibility is a major factor distinguishing it from conventional rigid material robots. These robots are capable of responding to external stimuli such as heat, light, solvents, or electric or magnetic fields. Among the various types of stimulus-responsive materials, the development of magnetically driven flexible robots has unique advantages and the potential for many important applications. The magnetic drive flexible robot is transparent to static and low-frequency magnetic fields due to natural tissues and organs, so that the magnetic drive flexible robot can be remotely controlled by the magnetic fields; at the same time, the magnetic fields are relatively easy to control, since their amplitude, phase and frequency can be modulated accurately and rapidly. However, the field of magnetically driven flexible robots is still in a starting stage, and further development is required in terms of material selection, design principles, manufacturing methods, control mechanisms, sensing modes and the like. Among them, finding a suitable magnetically driven flexible material is an important challenge for its practical application. Magnetostrictive materials, which produce large strains under the drive of magnetic fields, are a powerful alternative to flexible robotic applications. However, magnetostrictive materials have poor mechanical properties and are difficult to apply in flexible robots due to their easy-to-break properties.
In order to improve the mechanical properties of magnetostrictive materials, researchers have compounded magnetic materials with organic substances such as epoxy resins. The composite material may be tailored to a particular application by an appropriate combination of alloy and polymer and prepared in various forms, including embedded particles, ribbons, or flakes. These materials are particularly interesting for applications in vibration damping, driving and sensing. The choice of polymer is critical to the function of the alloy-polymer hybrid. However, in order to obtain a large magnetostriction property, the present researchers use polymers having high strength such as epoxy resin having high rigidity. In order to apply magnetostrictive materials to flexible robots, the flexibility of the material is more important than magnetically driven strain. Therefore, there is a need to develop a composite material with both flexibility and magnetostriction properties that can meet practical flexible robotic applications.
Disclosure of Invention
The invention aims to provide a material with flexibility and magnetostriction performance, and a preparation method and application thereof.
The composite material with the flexibility and magnetostriction performance is characterized by being composed of a magnetic material and a flexible organic material; the flexible organic material has good flexibility and can be bent at will without brittle fracture; the magnetic material has magnetostriction property and can be powder, thin strips and blocks.
Further, the flexible organic material is composed of one or more flexible materials of polyvinyl alcohol (PVA), polyester (PET), polyimide (PI), polyethylene naphthalate (PEN), hydrogel, and Polydimethylsiloxane (PDMS).
Further, the magnetic material is made of Ni-based alloy, iron-based alloy, ferrite, (Tb, dy) Fe 2 Alloy with compound as matrix and Ni 2 One or more magnetic materials in the MnGa-based alloy.
The preparation method of the composite material with the flexibility and the magnetostriction performance is characterized in that the composite material is Ni 2 The preparation method of the MnGa/PDMS composite material comprises the following steps:
(1) According to Ni 2 Preparing materials according to a chemical formula of MnGa;
(2) Putting the raw materials configured in the step (1) into an arc furnace for smelting to obtain an alloy ingot;
(3) Annealing the alloy ingot obtained in the step (2) at 600-1000 ℃, and then cooling to room temperature to obtain the magnetic material;
(4) Mechanically crushing or ball milling the magnetic material obtained in the step (3) into powder with proper particle size;
(5) Adding the magnetic particles obtained in the step (4) into a flexible organic material solvent, and uniformly stirring;
(6) Placing the mixture obtained in the step (5) into a magnetic field for orientation;
(7) And (3) curing the mixture obtained in the step (6) to obtain the composite material with the flexibility and magnetostriction performance.
Further, the raw materials of the synthesized Ni-Mn-Ga magnetic shape memory alloy are Ni, mn and Ga respectively, the purity is not lower than 99.9%, and the purity of cobalt, silicon and carbon is not lower than 99.99%. The smelting operation method in the step (2) comprises the following steps: vacuumizing the electric arc furnace to be less than or equal to 3 multiplied by 10 -3 Pa, argon with purity more than 99wt% is used, and the smelting is carried out for 3-5 times under the protection of argon with 1 atmosphere pressure at 1000-2000 ℃.
Further, the annealing in the step (3) is performed as follows: at 600-1000 deg.C, the vacuum degree is less than 3X 10 -3 Annealing for 3-15 days under Pa, and then cooling with a furnace or quenching with ice water to room temperature.
Further, the operation in the step (4) is as follows: and (3) placing the magnetic powder, the alcohol lamp solvent and the agate balls into a ball milling tank for ball milling for 0.5-240 hours to obtain the magnetic particles with proper particle sizes.
Further, the operation in the step (6) is as follows: the mixture was placed in a uniform magnetic field.
Further, the operation in the step (7) is as follows: the mixture is placed in an environment that cures the organic material, including elevated temperature, light.
Use of a composite material with both flexibility and magnetostriction properties prepared according to the method described above for the preparation of a magnetically driven flexible robot. The magnetic material provided by the invention has magnetostriction property;
the magnetic material shows magnetostriction effect under the action of a magnetic field. The magnetostriction effect refers to the change of strain with magnetic induction intensity under a magnetic field.
The invention provides a preparation method of a material with flexibility and magnetostriction performance, taking Ni-Mn-Ga/PDMS composite material as an example, which specifically comprises the following steps:
the raw materials for synthesizing the Ni-Mn-Ga magnetic shape memory alloy are Ni, mn and Ga respectively, the purity is not lower than 99.9%, and the cobalt, silicon and carbon are not lower than 99.99%.
Smelting and preparing Ni-Mn-Ga alloy by using an intermediate frequency vacuum induction smelting furnace, and casting into ingots by using a water-cooling copper mold. The cast ingot is sealed in a quartz tube, annealed for 5 days in 1073K environment, and quenched by ice water.
The annealed alloy is respectively ground into spherical particles with diameters of 40-50 mu m,100-150 mu m and 400-450 mu m by a ball mill.
(1) The particle sample with the particle size of 75-150 μm is sieved by a 100-200 mesh sieve.
(2) And (3) sucking 1g of polydimethylsiloxane and 0.1g of curing agent by using a dropper, uniformly mixing and stirring, adding 1.5g of the sample in the step (1), and uniformly stirring again.
(3) And (3) placing the sample uniformly stirred in the step (2) into a vacuum drying furnace, and drying for 6-7min at 80.5 ℃ for semi-curing pretreatment.
(4) And placing the pretreated sample in a magnetic field for orientation.
(5) And (3) placing the sample oriented in the step (4) into a vacuum drying furnace, and drying for 20-30 min at 80.5 ℃ for complete solidification.
According to the invention, a mechanical mixing mode is selected to combine Ni-Mn-Ga-based shape memory particles with an organic flexible polymer material, and an externally applied magnetic field effect is utilized in a preparation process to orient alloy particles, so that a magnetically driven flexible shape memory composite material is finally obtained.
In a further aspect, the invention also provides the use of a material having both flexible and magnetostrictive properties, produced according to the method of the invention.
Compared with the existing magnetostrictive materials and technologies, the flexible magnetostrictive material of the invention has the following beneficial effects, but is not limited to:
1. the preparation method of the flexible magnetostrictive material is simple and convenient, has no special requirement on equipment, is easy to reach the industrial production level, and has important practical value for developing a novel flexible magnetic phase change memory composite material.
2. The flexible magnetostrictive material effectively solves the problem of poor mechanical property of the magnetostrictive alloy and provides a good thought for the toughening process of the magnetostrictive alloy.
3. The flexible magnetostrictive material has obvious and controllable anisotropy and has wide application prospect in flexible vibration damping, driving and sensing devices.
4. The flexible magnetostrictive material has low material requirements, and reduces the dependence of the magnetostrictive material on the material.
5. The flexible magnetostrictive material can be a polycrystalline material, so that the preparation cost of the material is reduced.
Drawings
The embodiments of the present invention will be described in detail below with reference to the drawings, taking a Ni-Mn-Ga/PDMS composite as an example, wherein:
FIG. 1 is an X-ray diffraction pattern of Ni-Mn-Ga alloy collected at a characteristic temperature of 0.01T magnetic field in a phase transition temperature region.
FIG. 2 is a graph showing heat flow curves of Ni-Mn-Ga alloy during temperature increase and temperature decrease.
FIG. 3 shows the thermomagnetic curves of the Ni-Mn-Ga/PDMS composite during the temperature increase and decrease.
FIG. 4 is a plot of Ni-Mn-Ga alloy block evolution with magnetic field strength along [010] magnetic drive strain.
FIG. 5 is a graph showing the evolution of the magnetic drive strain of a Ni-Mn-Ga alloy block along the [001] direction with the strength of a magnetic field.
FIG. 6 is a plot of the evolution of Ni-Mn-Ga alloy block with magnetic field strength along the [010] direction magnetically driven strain at 280K.
FIG. 7 is a graph showing the evolution of Ni-Mn-Ga alloy blocks with magnetic field strength along the [010] direction under 290K.
FIG. 8 is a plot of the magnetic drive strain of a Ni-Mn-Ga alloy block at 300K along the [010] direction as a function of magnetic field strength.
FIG. 9 is a plot of the evolution of Ni-Mn-Ga alloy block with magnetic field strength along the [010] direction magnetically driven strain at 305K.
FIG. 10 is a plot of the evolution of Ni-Mn-Ga alloy block with magnetic field strength along the [010] direction magnetically driven strain at 310K.
FIG. 11 is a plot of the evolution of Ni-Mn-Ga alloy block with magnetic field strength along the [010] direction magnetically driven strain at 320K.
FIG. 12 is a graph showing the evolution of the magnetic field with the magnetic driving strain of the Ni-Mn-Ga/PDMS composite material along the [001] direction at 280K. A schematic representation of the bending of the composite under stress is given in the inset.
FIG. 13 shows the magnetic driving strain evolution curve of the Ni-Mn-Ga/PDMS composite material along the [001] direction at 290K.
FIG. 14 is a graph showing the evolution of the magnetic field with the magnetic driving strain of the Ni-Mn-Ga/PDMS composite material along the [001] direction at 300K.
Detailed Description
The invention is further illustrated by the following specific examples, which are, however, to be understood only for the purpose of more detailed description and are not to be construed as limiting the invention in any way.
The embodiment of the invention takes Ni-Mn-Ga/PDMS composite material as an example, wherein the chemical raw materials and equipment comprise:
simple substance Ni (purity 99.9 wt%), simple substance Mn (purity 99.9 wt%), simple substance Ga (purity 99.9 wt%). The medium-frequency vacuum induction melting furnace, the annealing furnace and the vibrating sample magnetometer are manufactured by Quantum Design (USA) company, and the model is Versa-Lab; differential Scanning Calorimeter (DSC) is manufactured by TA instruments, inc., USA, model number Q200.
Embodiment one: ni-Mn-Ga/PDMS flexible magnetostriction composite material
1. Preparation of Ni-Mn-Ga/PDMS composite
1) Batching according to the chemical formula of Ni-Mn-Ga;
2) Smelting and preparing Ni-Mn-Ga alloy by using an intermediate frequency vacuum induction smelting furnace, and casting into ingots by using a water-cooling copper mold.
3) The ingot is sealed in a quartz tube, annealed for 5 days at 1173K and quenched with ice water.
4) And respectively grinding the annealed alloy into particles by using a ball mill.
5) The particle samples with particle diameters of 38-75 μm and 75-150 μm were manually sieved.
6) And (3) uniformly mixing and stirring the polydimethylsiloxane solution and the curing agent, adding the sample obtained in the step (5), and uniformly stirring again.
7) And (3) placing the sample uniformly stirred in the step (6) into a vacuum drying furnace, and drying at 80 ℃ for 6-7min for semi-curing pretreatment.
8) The sample in step 7 is placed in a magnetic field for orientation.
9) And (3) placing the sample in the step (8) into a vacuum drying furnace, and drying at 80 ℃ for 20-30 min for curing.
2. Performance test:
1) Characterization of Crystal Structure
To confirm the change in the crystal structure of the Ni-Mn-Ga alloy before and after transformation, the present inventors selected to collect X-ray diffraction patterns thereof around the transformation characteristic temperature, and the results are shown in fig. 1. As can be seen, ni-Mn-Ga alloys have a significant transformation from austenite phase to martensite phase around room temperature.
2) Characterization of thermal effects
To measure the transformation temperature of the Ni-Mn-Ga alloy structure, the inventors measured the change in heat flow with temperature using a Differential Scanning Calorimeter (DSC), as shown in FIG. 2. It can be seen that the structural phase transformation of the Ni-Mn-Ga alloy has obvious thermal effect in the heating process, and the phase transformation temperature is about 311K. From this, it is clear that the Ni-Mn-Ga alloy prepared by the present inventors is a martensite phase at room temperature.
3) Characterization of magnetic Properties
The inventors measured the thermo-magnetic curve (M-T curve) of the Ni-Mn-Ga/PDMS composite material sample prepared in the examples of the present invention under a magnetic field of 0.01T using a vibrating sample magnetometer, as shown in fig. 3. The martensitic transformation temperature (T) of a Ni-Mn-Ga alloy sample can be determined from the M-T curve stru ) Near room temperature and exhibits thermal hysteresis, indicating first order phase change characteristics, demonstrating the structural phase change and magnetic phase change coupling characteristics.
4) Characterization of magnetic drive strain with magnetic field evolution
To investigate the working properties of the samples, the inventors measured the magnetic drive strain versus magnetic field strength curves of ni—mn—ga alloy blocks in both [001] and [010] directions using strain gages. As shown in FIGS. 4-9, it was determined that the Ni-Mn-Ga alloys all had a certain magnetic drive strain in a wide temperature range of 280K-320K. The magnetic drive strain is maximized at 290K around room temperature. The magnetic driving strain contrast of the Ni-Mn-Ga alloy in two different directions can obviously show that the magnetic driving strain property of the Ni-Mn-Ga alloy material has obvious anisotropy, and the magnetic driving strain of the Ni-Mn-Ga alloy in the [001] direction is far greater than the magnetic driving strain in the [010] direction.
Similarly, the inventors have studied the magnetic drive strain versus magnetic field strength curves of the Ni-Mn-Ga/PDMS composite samples prepared in the examples of the present invention along the two directions [001] and [010 ]. As shown in FIGS. 10-12, the Ni-Mn-Ga/PDMS composite along the [001] direction at 290K was strained to 290ppm in the first cycle, thus proving that the Ni-Mn-Ga/PDMS composite prepared by us has excellent magnetostriction property.
The Ni-Mn-Ga/PDMS composite material is repeatedly bent for tens of thousands of times, and the Ni-Mn-Ga/PDMS composite material is still kept in the original state, so that the magnetostriction performance is only slightly reduced, and the excellent mechanical property of the Ni-Mn-Ga/PDMS composite material is proved.
Embodiment two: (Tb, dy) Fe 2 PVA flexible magnetostriction composite material;
1. preparation of (Tb, dy) Fe 2 PVA composite material
1) According to (Tb, dy) Fe 2 The chemical formula of (2) is used for batching;
2) Smelting and preparing (Tb, dy) Fe by using medium-frequency vacuum induction smelting furnace 2 And (5) casting the alloy and the water-cooled copper mould into ingots.
3) The ingot is sealed in a quartz tube, annealed for 5 days at 1173K and quenched with ice water.
4) And respectively grinding the annealed alloy into particles by using a ball mill.
5) The particle samples with particle diameters of 38-75 μm and 75-150 μm were manually sieved.
6) And (3) uniformly mixing and stirring the polydimethylsiloxane solution and the curing agent, adding the sample obtained in the step (5), and uniformly stirring again.
7) And (3) placing the sample uniformly stirred in the step (6) into a vacuum drying furnace, and drying at 80 ℃ for 6-7min for semi-curing pretreatment.
8) The sample in step 7 is placed in a magnetic field for orientation.
9) And (3) placing the sample in the step (8) into a vacuum drying furnace, and drying at 80 ℃ for 20-30 min for curing.
2. Performance test:
1) Characterization of Crystal Structure
To confirm the (Tb, dy) Fe before and after phase transition 2 The inventors selected to collect their X-ray diffraction patterns around the phase transition characteristic temperature.
2) Characterization of magnetic Properties
The inventors measured (Tb, dy) Fe prepared in the examples of the present invention using a vibrating sample magnetometer 2 Thermomagnetic curve (M-T curve) of PVA composite sample under 0.01T magnetic field.
3) Characterization of magnetic drive strain with magnetic field evolution
To investigate the working properties of the samples, the inventors measured (Tb, dy) Fe using strain gauges 2 Alloy block rim [001]]And [010]]Magnetic drive strain profile with magnetic field strength in two directions
Similarly, the inventors have studied (Tb, dy) Fe prepared in the examples of the present invention 2 PVA composite sample edge [001]]And [010]]Magnetic drive strain in two directions is plotted against the magnetic field strength. Near room temperature (Tb, dy) Fe 2 The strain of the PVA composite material in the first cycle can reach 200ppm, thereby proving that (Tb, dy) Fe prepared by us 2 The PVA composite material has excellent magnetostriction performance.
By mixing (Tb, dy) Fe 2 Repeatedly bending the PVA composite material for tens of thousands times, (Tb, dy) Fe 2 The PVA composite material still keeps the original state, and the magnetostriction performance is only slightly reduced, so that the excellent mechanical property of the PVA composite material is proved.
Embodiment III: ni-Co/PET flexible magnetostriction composite material.
1. Preparation of Ni-Co/PET composite Material
1) Batching according to the chemical formula of Ni-Co;
2) Smelting and preparing Ni-Co alloy by using an intermediate frequency vacuum induction smelting furnace, and casting into ingots by using a water-cooling copper mold.
3) The ingot is sealed in a quartz tube, annealed for 5 days at 1173K and quenched with ice water.
4) And respectively grinding the annealed alloy into particles by using a ball mill.
5) The particle samples with particle diameters of 38-75 μm and 75-150 μm were manually sieved.
6) And (3) uniformly mixing and stirring the polydimethylsiloxane solution and the curing agent, adding the sample obtained in the step (5), and uniformly stirring again.
7) And (3) placing the sample uniformly stirred in the step (6) into a vacuum drying furnace, and drying at 80 ℃ for 6-7min for semi-curing pretreatment.
8) The sample in step 7 is placed in a magnetic field for orientation.
9) And (3) placing the sample in the step (8) into a vacuum drying furnace, and drying at 80 ℃ for 20-30 min for curing.
2. Performance test:
1) Characterization of Crystal Structure
To confirm the Ni-Co alloy crystal structure before and after transformation, the inventors chose to collect their X-ray diffraction patterns around the transformation characteristic temperature.
2) Characterization of magnetic Properties
The inventors measured the thermo-magnetic curve (M-T curve) of the Ni-Co/PET composite material sample prepared in the examples of the present invention under a magnetic field of 0.01T using a vibrating sample magnetometer.
4) Characterization of magnetic drive strain with magnetic field evolution
To investigate the working properties of the samples, the inventors measured the magnetic drive strain versus magnetic field strength curves of the Ni-Co alloy blocks in both [001] and [010] directions using strain gages.
Similarly, the inventors have studied the magnetic drive strain versus magnetic field strength curves of the Ni-Co/PET composite samples prepared in the examples of the present invention along the two directions [001] and [010 ]. The Ni-Co/PET composite material near room temperature along the [001] direction is strained to 90ppm in the first cycle, thereby proving that the Ni-Co/PET composite material prepared by us has excellent magnetostriction performance.
The Ni-Co/PET composite material is repeatedly bent for tens of thousands of times, and the Ni-Co/PET composite material is still kept in the original state, so that the magnetostriction performance is only slightly reduced, and the excellent mechanical property of the Ni-Co/PET composite material is proved.
Although the present invention has been described to a certain extent, it is apparent that appropriate changes may be made in the individual conditions without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the described embodiments, but is to be given the full breadth of the claims, including equivalents of each of the elements described.
Claims (10)
1. The composite material with the flexibility and magnetostriction performance is characterized by being composed of a magnetic material and a flexible organic material; the flexible organic material has good flexibility and can be bent at will without brittle fracture; the magnetic material has magnetostriction property and can be powder, thin strips and blocks.
2. The composite material with both flexibility and magnetostriction properties according to claim 1, wherein said flexible organic material is comprised of one or more flexible materials of polyvinyl alcohol (PVA), polyester (PET), polyimide (PI), polyethylene naphthalate (PEN), hydrogel and Polydimethylsiloxane (PDMS).
3. The composite material having both flexibility and magnetostriction properties as claimed in claim 1, wherein said magnetic material is selected from the group consisting of Ni-based alloys, iron-based alloys, ferrites, (Tb, dy) Fe 2 Alloy with compound as matrix and Ni 2 One or more magnetic materials in the MnGa-based alloy.
4. A method for preparing a composite material with both flexibility and magnetostriction performance as claimed in claim 1, wherein the composite material is Ni 2 The preparation method of the MnGa/PDMS composite material comprises the following steps:
(1) According to Ni 2 Preparing materials according to a chemical formula of MnGa; the raw materials are Ni, mn and Ga respectively, the purity is not lower than 99.9%, and the purity of cobalt, silicon and carbon is not lower than 99.99%.
(2) Putting the raw materials configured in the step (1) into an arc furnace for smelting to obtain an alloy ingot;
(3) Annealing the alloy ingot obtained in the step (2) at 600-1000 ℃, and then cooling to room temperature to obtain the magnetic material;
(4) Mechanically crushing or ball milling the magnetic material obtained in the step (3) into powder with proper particle size;
(5) Adding the magnetic particles obtained in the step (4) into a flexible organic material solvent, and uniformly stirring;
(6) Placing the mixture obtained in the step (5) into a magnetic field for orientation;
(7) And (3) curing the mixture obtained in the step (6) to obtain the composite material with the flexibility and magnetostriction performance.
5. The method for preparing the composite material with both flexibility and magnetostriction performance according to claim 4, wherein the purity of the raw material is more than or equal to 99.9wt%; the smelting operation method in the step (2) comprises the following steps: vacuumizing the electric arc furnace to be less than or equal to 3 multiplied by 10 -3 Pa, argon with purity more than 99wt% is used, and the smelting is carried out for 3-5 times under the protection of argon with 1 atmosphere pressure at 1000-2000 ℃.
6. The method for producing a composite material having both flexibility and magnetostriction properties as claimed in claim 4, wherein the annealing in said step (3) is performed by: at 600-1000 deg.C, the vacuum degree is less than 3X 10 -3 Annealing for 3-15 days under Pa, and then cooling with a furnace or quenching with ice water to room temperature.
7. The method for producing a composite material having both flexibility and magnetostriction properties as claimed in claim 4, wherein said operation in said step (4) is: and (3) placing the magnetic powder, the alcohol lamp solvent and the agate balls into a ball milling tank for ball milling for 0.5-240 hours to obtain the magnetic particles with proper particle sizes.
8. The method for producing a composite material having both flexibility and magnetostriction properties as claimed in claim 4, wherein said operation in said step (6) is: the mixture was placed in a uniform magnetic field.
9. The method for producing a composite material having both flexibility and magnetostriction properties as claimed in claim 4, wherein said operation in said step (7) is: the mixture is placed in an environment that cures the organic material, including elevated temperature, light.
10. Use of a composite material with both flexibility and magnetostriction properties prepared according to the method of claim 4, characterized in that said composite material with both flexibility and magnetostriction properties is used for the preparation of magnetically driven flexible robots.
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