CN110273078B - Magnetic (FeCoNi)1.5CuBmREn)PAl composite material and preparation method thereof - Google Patents
Magnetic (FeCoNi)1.5CuBmREn)PAl composite material and preparation method thereof Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims abstract description 20
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- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 31
- 239000011159 matrix material Substances 0.000 claims abstract description 29
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 26
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- 238000009768 microwave sintering Methods 0.000 claims abstract description 16
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Abstract
The invention provides a magnetic (FeCoNi)1.5CuBmREn)PThe composite material takes pure aluminum or aluminum alloy as a matrix and FeCoNi is added1.5CuBmREnFeCoNi, a high-entropy alloy, as a composite phase of reinforcing particles, for enhancing the properties and giving magnetism to the material1.5CuBmREnThe addition amount of the high-entropy alloy composite phase accounts for 5-20% of the total mass fraction of the material. The preparation method of the composite material comprises the following steps of firstly preparing high-entropy alloy powder; preparing composite powder of high-entropy alloy and aluminum or aluminum alloy; then, isostatic pressing is carried out; and finally, microwave sintering and curing. The composite material prepared by the invention has high obdurability and excellent magnetic property, and has high application value in the traditional and emerging fields of electronics, computers, information communication, medical treatment, aerospace, automobiles, wind power, environmental protection, energy conservation and the like.
Description
Technical Field
The invention belongs to the field of composite material preparation, relates to a preparation method of a particle reinforced aluminum-based composite material, and particularly relates to magnetic (FeCoNi)1.5CuBmREn)Pa/Al composite material and a preparation method thereof.
Background
The particle reinforced aluminum-based composite material takes metal aluminum and alloy thereof as a matrix and takes metal or nonmetal particles as reinforcement; the heterogeneous mixture particle reinforced aluminum matrix composite material of the phase has excellent performances of high specific strength, high specific modulus, good wear resistance, good size stability and the like.
However, the poor bonding effect of the ceramic particle/aluminum interface often results in that the plasticity and toughness potential of the ceramic particle reinforced aluminum matrix composite material cannot be fully exerted; how to obtain good plasticity and toughness while improving the strength of the composite material is a goal pursued by researchers.
Disclosure of Invention
The invention aims to provide a magnetic high-entropy alloy particle reinforced aluminum matrix composite material and a preparation method thereof, namely magnetic (FeCoNi)1.5CuBmREn)PThe Al composite material overcomes the problem of poor combination of the reinforced particles and the matrix interface, and has good magnetic performance while maintaining the toughness of the material.
The present invention achieves the above-described object by the following technical means.
Magnetic (FeCoNi)1.5CuBmREn)Pthe/Al composite material is characterized in that: taking pure aluminum or aluminum alloy as a matrix, adding FeCoNi1.5CuBmREnThe high-entropy alloy particles are used as a composite phase, RE is any one or more of rare earth elements Nd, Sm and Y, wherein m is more than or equal to 0.5 and less than or equal to 1.5; n is more than or equal to 0 and less than or equal to 1.0.
Further, the FeCoNi1.5CuBmREnThe addition amount of the high-entropy alloy particle composite phase accounts for 5-20% of the total mass of the material.
Further, the matrix of the aluminum alloy refers to a cast aluminum alloy or a wrought aluminum alloy.
The magnetic property (FeCoNi)1.5CuBmREn)PThe preparation method of the/Al composite material is characterized by comprising the following steps:
(1) using metal powder Fe, Co, Ni, Cu, Y, Sm, Nd and non-metal powder B as raw material, according to FeCoNi1.5CuBmREnWeighing the mixture ratio and mixing the powder;
(2) putting the proportioned mixed powder into a ball milling tank for ball milling, preparing high-entropy alloy powder by adopting a mechanical alloying method, vacuumizing during ball milling, and introducing argon for protection;
(3) carrying out vacuum drying treatment on the prepared high-entropy alloy powder, mixing the high-entropy alloy powder with matrix aluminum or aluminum alloy powder, carrying out low-energy ball milling by adopting a ball mill to obtain mixed powder, vacuumizing during ball milling, and introducing argon for protection;
(4) forming the composite powder by using a cold isostatic pressing process to prepare a massive solid composite material;
(5) and putting the massive solid composite material into a crucible, and sintering and solidifying by adopting a microwave sintering technology to obtain the high-entropy alloy particle reinforced aluminum-based composite material.
Furthermore, in the step (1), the powder purity of the metal powder and the nonmetal powder B is 99.99 wt%, and the particle size of the powder is less than or equal to 30 μm.
Further, in the step (2), the experimental parameters of the ball milling process are as follows: the ball material mass ratio is 10: 1-15: 1, ball milling is divided into dry milling and wet milling, the dry milling is carried out firstly, then the wet milling is carried out, the absolute ethyl alcohol is used as a process control agent for the wet milling, and the mass fraction is 10-20%; wherein the dry grinding speed is 100-300 r/min, and the time is 20-40 h; wet grinding at a rotation speed of 200-400 r/min for 10-20 h; the particle size range of the powder after ball milling is 0.1-5 mu m, and the powder is taken out after vacuum drying for 40-60 h after ball milling is finished.
Further, in the step (3), the ball milling parameters are as follows: the ball material mass ratio is 5: 1-10: 1, wet grinding is carried out for 10-30 h, the process control agent is absolute ethyl alcohol, the mass fraction is 15-25%, and the rotating speed is 120-180 r/min.
Further, in the step (4), the experimental parameters of the press forming process are as follows: the pressure maintaining time is 1-5 min, and the forming pressure is 200-300 Mpa.
Further, in the step (5), the experimental parameters of the microwave sintering process are as follows: the sintering temperature is 400-600 ℃, the temperature is kept for 30-40 min, the heating rate is 50-80 ℃/min, and the vacuum degree is less than 20 Pa.
The multi-principal-element high-entropy alloy is a brand-new alloy system, and the unique microstructure of the multi-principal-element high-entropy alloy enables the high-entropy alloy to have high hardness, high strength, wear resistance, corrosion resistance, high-temperature thermal stability, special magnetic properties, special electric properties and other excellent properties.
The interface wettability and the interface compatibility between the high-entropy alloy and the aluminum alloy matrix are good due to the natural interface bonding characteristic between metal and metal; if the high-entropy alloy can be used as a reinforcing phase to reinforce and toughen the aluminum alloy, the bottleneck of traditional ceramic reinforcing and toughening is broken through, and the strength and plasticity of the composite material are improved at the same time.
The magnetic material is mainly a substance which is composed of transition elements such as iron, cobalt, nickel and alloy thereof and can directly or indirectly generate magnetism; the magnetic material has quite wide application fields, including the application in the aspects of traditional industry, biological and medical fields, military field and the like; the high-entropy alloys developed at present are soft magnetic materials or semi-hard magnetic materials, which are caused by the action that the high-entropy alloys contain elements such as Fe, Co, Ni and the like with higher proportion; FeCoNi adopted in the invention1.5CuBmREnThe high-entropy alloy particles are toughened HEAS hard magnetic composite materials.
Based on the special excellent magnetic performance of the multi-principal-element high-entropy alloy, the aluminum-based composite material is reinforced by adopting magnetic high-entropy alloy particles as a reinforcing phase, so that the composite material can be synchronously strengthened, toughened and magnetized.
Compared with the prior art, the invention has the following beneficial effects:
FeCoNi1.5CuBmREnthe high-entropy alloy has large atomic size difference, high mixing enthalpy and unique FCC + various magnetic phase structures, is beneficial to improving material performance, has high tissue density, has higher mechanical property, and has the advantages of good hard magnetic property and the like; the brittleness and sintering temperature of the metal-based reinforcing phase of the existing particle reinforced aluminum-based composite material are limited, and the problem that an effective interface is difficult to generate between the existing non-metal particle reinforcing body and an aluminum base is difficult to realize the synchronous improvement of the strength and the plasticity of the composite material, so that the toughness of the composite material is greatly reduced.
The invention utilizes FeCoNi1.5CuBmREnHigh-entropy alloy powder particles are used as a reinforcing phase, and good interface wetting between a metal-based reinforcement and an aluminum alloy matrix is utilized to ensure that the reinforcement particles and the aluminum alloy matrix are wettedThe method has the advantages of generating a stable and effective interface, solving the problems that the existing non-metal particle reinforcement and aluminum matrix are difficult to generate an effective interface and a metal matrix reinforcement phase, and the brittleness and sintering temperature are limited, improving the material strength, improving the plasticity of the composite material, and greatly improving the toughness of the composite material.
The traditional particle reinforced aluminum matrix composite has more researches on interface bonding development, mechanical properties and comprehensive thermodynamic properties, and does not relate to many special excellent properties such as magnetic property, electrical property and the like of the composite; the invention utilizes FeCoNi1.5CuBmREnThe method is based on the special excellent magnetic performance of the multi-principal-element high-entropy alloy, and prepares the permanent magnetic composite material, the magnetic high-strength and high-toughness aluminum-based composite material has wide application field, and has great engineering value for developing a non-processing strengthening and toughening HEAS hard magnetic composite material and a preparation technology thereof.
The invention adopts the microwave sintering process to sinter and solidify the sample, and compared with other sintering processes, the microwave sintering process has the following advantages:
(1) high efficiency, low energy consumption and environmental protection;
(2) the density of a sintered sample is improved;
(3) due to low-temperature rapid sintering, a smaller grain structure can be obtained;
(4) the microstructure and the mechanical property of a sintered sample are greatly improved by uniform volume heating and smaller sintering pores;
(5) the microwave sintering process has simple production equipment and is easy to popularize.
Drawings
Fig. 1 is a SEM analysis result diagram of the magnetic high-entropy alloy particle-reinforced aluminum matrix composite prepared in example 1.
Fig. 2 is a XRD analysis result chart of the magnetic high-entropy alloy particle-reinforced aluminum-based composite material prepared in example 1.
Detailed Description
The invention will be further described with reference to the following figures and specific examples, but the scope of the invention is not limited thereto.
Magnetic (FeCoNi) of the invention1.5CuBmREn)PThe Al composite material takes pure aluminum or aluminum alloy as a matrix, and the matrix of the aluminum alloy is cast aluminum alloy or wrought aluminum alloy. Addition of FeCoNi1.5CuBmREnThe high-entropy alloy particles are used as a composite phase, RE is any one or more of rare earth elements Nd, Sm and Y, wherein m is more than or equal to 0.5 and less than or equal to 1.5; n is more than or equal to 0 and less than or equal to 1.0. The FeCoNi1.5CuBmREnThe addition amount of the high-entropy alloy particle composite phase accounts for 5-20% of the total mass of the material.
FeCoNi1.5CuBmREnThe high-entropy alloy has large atomic size difference, high mixing enthalpy and unique FCC + various magnetic phase structures, has high tissue density, has higher mechanical property, simultaneously has the advantages of good hard magnetic property and the like.
The invention utilizes FeCoNi1.5CuBmREnThe high-entropy alloy powder particles are used as a reinforcing phase, so that a stable and effective interface is generated between the reinforcing body particles and the aluminum alloy matrix by utilizing good interface wetting between the metal-based reinforcing body and the aluminum alloy matrix, the problems that the existing non-metal particle reinforcing body and an aluminum base are difficult to generate an effective interface and the self brittleness and sintering temperature of the metal-based reinforcing phase are limited are solved, the plasticity of the composite material is improved while the strength of the material is improved, and the toughness of the composite material is greatly improved.
Meanwhile, the invention utilizes FeCoNi1.5CuBmREnThe high-entropy alloy has the advantage of good hard magnetic property, and the permanent magnetic composite material is prepared based on the special excellent magnetic property of the multi-principal-element high-entropy alloy. The material is endowed with good magnetism while the mechanical property is enhanced.
Example 1:
the rare earth element in the reinforced particles adopts Nd, and the molecular formula of the reinforced particles is as follows: FeCoNi1.5CuB0.5Nd。
Magnetic (FeCoN)i1.5CuB0.5The preparation method of the Nd) P/Al composite material comprises the steps of preparing high-entropy alloy powder, preparing composite powder, cold isostatic pressing and sintering and curing:
(1) preparing high-entropy alloy powder: FeCoNi is selected as reinforcing base1.5CuB0.5The Nd high-entropy alloy is prepared by calculating and weighing metal powder with corresponding mass according to the ratio of atomic number 1:1:1.5:1:0.5:1, placing the mixed powder in a ball milling tank, vacuumizing, introducing argon, and then performing high-energy ball milling mechanical alloying; the ball milling parameters are that the ball material mass ratio is 12:1, dry milling is carried out for 30h at the rotating speed of 150r/min, then absolute ethyl alcohol is added as a process control agent, and wet milling is carried out for 12h at the rotating speed of 250 r/min; drying for 45h to obtain the high-entropy alloy powder.
(2) Preparing composite powder: mixing the high-entropy alloy powder particles and pure aluminum powder according to the addition amount of a reinforcing phase (the mass fraction is 5 percent), and carrying out ball milling by using a ball mill to obtain composite powder, wherein the ball milling is carried out under the protection of vacuum argon, the ball milling parameters comprise that the ball-material mass ratio is 6:1, the wet milling is carried out for 15 hours, the process control agent is absolute ethyl alcohol, the mass fraction is 20 percent, and the rotating speed is 150 r/min.
(3) And (3) cold isostatic pressing: the experimental parameters of the press forming process were: maintaining the pressure for 2min, and molding at 250 MPa.
(4) Sintering and curing: putting the massive solid composite material into a crucible, and sintering by adopting a microwave sintering technology to obtain a magnetic high-entropy alloy particle reinforced aluminum-based composite material; the experimental parameters of the microwave sintering process are as follows: the sintering temperature is 450 ℃, the temperature is kept for 35min, the heating rate is 60 ℃/min, and the vacuum degree is less than 20 Pa.
FIGS. 1 and 2 are magnetic (FeCoNi) prepared in example 1, respectively1.5CuBmREn)PAnd detecting results of SEM and XRD of the/Al composite material. SEM scanning analysis results show that an obvious boundary exists between the high-entropy alloy particles and the Al matrix, and a more obvious element diffusion phenomenon does not occur. The surface of the composite material is flat and smooth, the holes are few, and the combination between the high-entropy alloy reinforcement particles and the aluminum matrix generates a stable and effective interface, which shows that the metal and the metal are goodAnd the wettability can be seen from the mechanical properties of the material, and the high-entropy alloy particles have very obvious strengthening effect on the obdurability of the aluminum matrix composite material. XRD detection results show that only two phases, namely Al and FeCoNi, are detected in the composite material1.5CuB0.5And an Nd reinforcing phase. In addition, the magnetic property data of the material show that the composite phase is a magnetic phase, and the magnetic property of the material is reserved. Through the analysis of the detection result, the magnetic (FeCoNi) is successfully prepared1.5CuBmREn)Pa/Al composite material.
Magnetic (FeCoNi) prepared in this example1.5CuBmREn)PThe performance values of the/Al composite are: hardness 176.2HV, fracture toughness 210MPa m1/2(ii) a The remanence Br reaches 0.38T, and the coercive force Hcj reaches 0.85T.
Example 2:
FeCoNi is selected as reinforcing base1.5CuB0.5Nd high-entropy alloy, and the matrix phase is aluminum alloy. The preparation method of the composite material comprises the following steps:
(1) preparing high-entropy alloy powder: FeCoNi is selected as reinforcing base1.5CuB0.5The Nd high-entropy alloy is prepared by calculating and weighing metal powder with corresponding mass according to the ratio of atomic number 1:1:1.5:1:0.5:1, placing the mixed powder in a ball milling tank, vacuumizing, introducing argon, then performing high-energy ball milling mechanical alloying, performing dry milling for 35 hours at the rotation speed of 250r/min, then adding absolute ethyl alcohol as a process control agent, performing wet milling for 16 hours, and drying for 55 hours to obtain the high-entropy alloy powder.
(2) Preparing composite powder: mixing the high-entropy alloy powder particles and ZL101 aluminum alloy powder according to the addition amount of a reinforcing phase, wherein the mass fraction is 10%, ball milling is carried out by adopting a ball mill to obtain composite powder, and the ball milling is carried out under the protection of vacuum argon; the ball milling parameters are as follows: the ball-material ratio is 8:1, wet grinding is carried out for 25h, the process control agent is absolute ethyl alcohol, the mass fraction is 20%, and the rotating speed is 170 r/min.
(3) And (3) cold isostatic pressing: the experimental parameters of the press forming process were: maintaining the pressure for 3min, and molding at 280 MPa.
(4) Sintering and curing: putting the massive solid composite material into a crucible, and sintering by adopting a microwave sintering technology to obtain a magnetic high-entropy alloy particle reinforced aluminum-based composite material; the experimental parameters of the microwave sintering process are as follows: the sintering temperature is 550 ℃, the temperature is kept for 30min, the heating rate is 70 ℃/min, and the vacuum degree is less than 20 Pa.
Magnetic (FeCoNi) prepared in this example1.5CuBmREn)PThe performance values of the/Al composite are: hardness of 184.6HV and fracture toughness of 200 MPa-m1/2(ii) a The remanence Br reaches 0.43T, and the coercive force Hcj reaches 0.9T.
Example 3:
FeCoNiCuB is selected as reinforcing base1.25Y0.7Nd0.3The high-entropy alloy is an aluminum alloy as a matrix phase. The preparation method comprises the following steps:
(1) preparing high-entropy alloy powder: FeCoNiCuB is selected as reinforcing base1.25Y0.7Nd0.3High-entropy alloy, calculating and weighing metal powder with corresponding mass according to the ratio of atomic number 1:1:1:1.25:0.7:0.3, placing the mixed powder in a ball milling tank, vacuumizing, introducing argon, and then performing high-energy ball milling mechanical alloying; the ball milling parameters are that the ball material mass ratio is 12:1, dry milling is carried out for 30h at the rotating speed of 150r/min, then absolute ethyl alcohol is added as a process control agent, and wet milling is carried out for 12h at the rotating speed of 250 r/min; drying for 45h to obtain the high-entropy alloy powder.
(2) Preparing composite powder: the high-entropy alloy powder particles and 6063 aluminum alloy powder are added according to the mass fraction of the reinforcing phase: mixing 15 percent of the mixture, ball-milling the mixture by using a ball mill to obtain composite powder, and carrying out ball-milling under the protection of vacuum argon; the ball milling parameters are as follows: the ball material mass ratio is 6:1, wet grinding is carried out for 15h, the process control agent is absolute ethyl alcohol, the mass fraction is 20%, and the rotating speed is 150 r/min.
(3) And (3) cold isostatic pressing: the experimental parameters of the press forming process were: maintaining the pressure for 2min, and molding at 250 MPa.
(4) Sintering and curing: putting the massive solid composite material into a crucible, and sintering by adopting a microwave sintering technology to obtain a magnetic high-entropy alloy particle reinforced aluminum-based composite material; the experimental parameters of the microwave sintering process are as follows: the sintering temperature is 450 ℃, the temperature is kept for 35min, the heating rate is 60 ℃/min, and the vacuum degree is less than 20 Pa.
Magnetic (FeCoNi) prepared in this example1.5CuBmREn)PThe performance values of the/Al composite are: the hardness is 157.8HV, and the fracture toughness is 220 MPa-m 1/2; the remanence Br reaches 0.36T, and the coercive force Hcj reaches 0.88T.
Example 4:
FeCoNiCuB is selected as reinforcing base1.25Y0.7Nd0.3The high-entropy alloy is an aluminum alloy as a matrix phase. The preparation method comprises the following steps:
(1) preparing high-entropy alloy powder: FeCoNiCuB is selected as reinforcing base1.25Y0.7Nd0.3The high-entropy alloy is prepared by calculating and weighing metal powder with corresponding mass according to the ratio of atomic number 1:1:1:1.25:0.7:0.3, putting the mixed powder into a ball milling tank, vacuumizing and introducing argon, then performing high-energy ball milling mechanical alloying, wherein the ball milling parameters comprise that firstly, dry milling is performed for 35 hours, the rotating speed is 250r/min, then, absolute ethyl alcohol is added as a process control agent, and wet milling is performed for 16 hours. Drying for 55h to obtain the high-entropy alloy powder.
(2) Preparing composite powder: adding the high-entropy alloy powder particles and the 2024 aluminum alloy powder into a reinforcing phase according to the mass fraction: mixing 20 percent of the mixture, ball-milling the mixture by using a ball mill to obtain composite powder, and carrying out ball-milling under the protection of vacuum argon; the ball milling parameters are as follows: the ball-material ratio is 8:1, wet grinding is carried out for 25h, the process control agent is absolute ethyl alcohol, the mass fraction is 20%, and the rotating speed is 170 r/min.
(3) And (3) cold isostatic pressing: the experimental parameters of the press forming process were: maintaining the pressure for 3min, and molding at 280 MPa.
(4) Sintering and curing: putting the massive solid composite material into a crucible, and sintering by adopting a microwave sintering technology to obtain a magnetic high-entropy alloy particle reinforced aluminum-based composite material; the experimental parameters of the microwave sintering process are as follows: the sintering temperature is 550 ℃, the temperature is kept for 30min, the heating rate is 70 ℃/min, and the vacuum degree is less than 20 Pa.
Magnetic (FeCoNi) prepared in this example1.5CuBmREn)PAl complexThe values of the properties of the composite are: hardness 176.2HV, fracture toughness 205MPa m1/2(ii) a The remanence Br reaches 0.40T, and the coercive force Hcj reaches 0.92T.
The present invention is not limited to the above-described embodiments, and any obvious improvements, substitutions or modifications can be made by those skilled in the art without departing from the spirit of the present invention.
Claims (9)
1. Magnetic (FeCoNi)1.5CuBmREn)PThe preparation method of the/Al composite material is characterized by comprising the following steps:
(1) using metal powder Fe, Co, Ni, Cu, Y, Sm, Nd and non-metal powder B as raw material, according to FeCoNi1.5CuBmREnWeighing the mixture ratio and mixing the powder; wherein RE is any one or more of rare earth elements Nd, Sm and Y, wherein m is more than or equal to 0.5 and less than or equal to 1.5; n is more than or equal to 0 and less than or equal to 1.0;
(2) putting the proportioned mixed powder into a ball milling tank for ball milling, preparing high-entropy alloy powder by adopting a mechanical alloying method, vacuumizing during ball milling, and introducing argon for protection;
(3) FeCoNi to be prepared1.5CuBmREnVacuum drying the high-entropy alloy powder to obtain FeCoNi1.5CuBmREnMixing the high-entropy alloy powder with matrix aluminum or aluminum alloy powder, performing low-energy ball milling by using a ball mill to obtain mixed powder, vacuumizing during ball milling, and introducing argon for protection;
(4) forming the mixed powder in the step (3) by using a cold isostatic pressing process to prepare a massive solid composite material;
(5) and putting the massive solid composite material into a crucible, and sintering and solidifying by adopting a microwave sintering technology to obtain the high-entropy alloy particle reinforced aluminum-based composite material.
2. Magnetic (FeCoNi) according to claim 11.5CuBmREn)PPreparation of/Al composite materialThe method is characterized in that in the step (1), the powder purity of the metal powder and the nonmetal powder B is 99.99 wt%, and the particle size of the powder is less than or equal to 30 mu m.
3. Magnetic (FeCoNi) according to claim 11.5CuBmREn)PThe preparation method of the/Al composite material is characterized in that in the step (2), experimental parameters of a ball milling process are as follows: the ball material mass ratio is 10: 1-15: 1, ball milling is divided into dry milling and wet milling, the dry milling is carried out firstly, then the wet milling is carried out, the absolute ethyl alcohol is used as a process control agent for the wet milling, and the mass fraction is 10-20%; wherein the dry grinding speed is 100-300 r/min, and the time is 20-40 h; wet grinding at a rotation speed of 200-400 r/min for 10-20 h; the particle size range of the powder after ball milling is 0.1-5 mu m, and the powder is taken out after vacuum drying for 40-60 h after ball milling is finished.
4. Magnetic (FeCoNi) according to claim 11.5CuBmREn)PThe preparation method of the/Al composite material is characterized in that in the step (3), the ball milling parameters are as follows: the ball material mass ratio is 5: 1-10: 1, wet grinding is carried out for 10-30 h, the process control agent is absolute ethyl alcohol, the mass fraction is 15-25%, and the rotating speed is 120-180 r/min.
5. Magnetic (FeCoNi) according to claim 11.5CuBmREn)PThe preparation method of the/Al composite material is characterized in that in the step (4), experimental parameters of the compression molding process are as follows: the pressure maintaining time is 1-5 min, and the forming pressure is 200-300 Mpa.
6. Magnetic (FeCoNi) according to claim 11.5CuBmREn)PThe preparation method of the/Al composite material is characterized in that in the step (5), the experimental parameters of the microwave sintering process are as follows: the sintering temperature is 400-600 ℃, the temperature is kept for 30-40 min, the heating rate is 50-80 ℃/min, and the vacuum degree is<20Pa。
7. Magnetic (FeCoNi) prepared by the preparation method according to any one of claims 1 to 61.5CuBmREn)Pthe/Al composite material is characterized in that: taking pure aluminum or aluminum alloy as a matrix, adding FeCoNi1.5CuBmREnThe high-entropy alloy particles are used as a composite phase, RE is any one or more of rare earth elements Nd, Sm and Y, wherein m is more than or equal to 0.5 and less than or equal to 1.5; n is more than or equal to 0 and less than or equal to 1.0.
8. Magnetic (FeCoNi) according to claim 71.5CuBmREn)Pthe/Al composite material is characterized in that the FeCoNi1.5CuBmREnThe addition amount of the high-entropy alloy particle composite phase accounts for 5-20% of the total mass of the material.
9. Magnetic (FeCoNi) according to claim 71.5CuBmREn)Pthe/Al composite material is characterized in that the matrix of the aluminum alloy is cast aluminum alloy or wrought aluminum alloy.
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