CN111471909A

CN111471909A - Five-component magnetic high-entropy alloy and preparation method thereof

Info

Publication number: CN111471909A
Application number: CN202010280623.4A
Authority: CN
Inventors: 李艳国; 邹芹; 王明智; 赵玉成; 罗文奇; 邹娟
Original assignee: Yanshan University
Current assignee: Yanshan University
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2020-07-31

Abstract

The invention provides a five-component magnetic high-entropy alloy material which comprises the following chemical components in percentage by mass: iron powder: 16.38-37.02 wt.%, cobalt powder: 9.5-38.65 wt.%, nickel powder: 6.16-39.63 wt.%, manganese powder: 5.69-37.62 wt.%, aluminum powder: 2.53-12.87 wt.%. The invention also provides a preparation method of the five-component magnetic high-entropy alloy, which comprises the following steps: s1: carrying out ball milling on iron powder, cobalt powder, nickel powder, manganese powder and aluminum powder on a ball mill; s2: annealing the five-component magnetic high-entropy alloy powder synthesized in the step S1 for 1-5 hours in an argon environment at the temperature of 300-600 ℃; s3: pre-pressing and molding the five-component magnetic high-entropy alloy powder annealed in the step S2 under the pressure of 200-500 MPa; s4: performing spark plasma sintering on the pre-pressed sample; s5: and annealing the sintered body in an argon environment at the temperature of 300-600 ℃ for 1-20 h, and then grinding and polishing to obtain the five-component magnetic high-entropy alloy material. The technical scheme of the invention solves the defects of the traditional preparation method of the bulk magnetic high-entropy alloy.

Description

Five-component magnetic high-entropy alloy and preparation method thereof

Technical Field

The invention relates to the field of magnetic materials, in particular to a five-component magnetic high-entropy alloy and a preparation method thereof.

Background

The magnetic material is an important functional material in industrial production and human life, is small in size and large in size, such as an electronic magnetic core and an engineering mechanical part, and influences human production and life constantly. Plays an important role in the development of modern science and technology and industry, in particular in the development of electronic technology. The research of the magnetic functional material has been in the history of nearly one hundred years, however, along with the continuous development of social science and technology, the performance requirement of industrial production on the magnetic material is higher and higher, although the performance of the traditional magnetic material is continuously improved under the efforts of scientific researchers, the research on the performance of the traditional magnetic material is more and more difficult, and under the condition, the novel magnetic material such as the bamboo shoots in spring after rain continuously appears. The excellent performance of the high-entropy alloy on the magnetic function for over ten years brings a new idea for the research of the magnetic material.

In 1995, leaves and the like break through the traditional concept of material design, and a new alloy design concept is provided on the basis of amorphous alloy, namely High inversion Alloys (HEAs). The high-entropy alloy is an alloy with higher mixed entropy, which is formed by alloying more than 5 element components according to equal atomic ratio or nearly equal atomic ratio and generally forms a solid solution. It was defined as a high entropy alloy in 2004. The atomic fraction of the main elements is 5 to 35 percent. Due to the thermodynamic high-entropy effect, the structural lattice distortion effect, the kinetic delayed diffusion effect and the performance cocktail effect, a solid solution phase with high thermal stability and a nano-structure or even an amorphous structure can be easily obtained, the functional research of the high-entropy alloy becomes one of the research hotspots of the high-entropy alloy in recent years, and the research on the magnetic property attracts more and more material research workers. Many scholars in China have made certain research.

2008, phyllanthus urinaria et al disclose a preparation method of a high-entropy alloy magnetic material, which adopts a cathode electrodeposition method to prepare the high-entropy alloy magnetic material containing thulium, bismuth, iron, cobalt, nickel and manganese. The preparation method of the high-entropy alloy magnetic material is simple in preparation process, cheap and economical in used raw materials and high in utilization rate, and the obtained magnetic material has the advantages of soft magnetism and permanent magnetism, and has high utilization value and market prospect [ Bodhair, Yaohuchai, Yexieliqing and the like ]. In 2009 Zhengwuwu utilized a non-consumable arc melting furnace to prepare FeNiCrAl system quaternary alloy, FeNiCrAlCu system quinary alloy and FeNiCrAlCuCo senary alloy, and each alloy formed a simple body-centered cubic solid solution structure or a simple body-centered cubic + face-centered cubic solid solution structure. The alloy hardness can reach 543.79HV to the maximum, the saturation magnetization range of the alloy is 29.9-61.6 emu/g, and the coercive force is 7.76 Oe-45.42 Oe [ Zhengzhuang. FeNiCrAl multi-principal element high entropy alloy microscopic structure and performance research [ D ]. Harbin university, 2009 ]. 2013, Wangcousheng and the like disclose a hexatomic MgaMnbFecCodNieGdf high-entropy alloy with first-order magnetic phase change and a preparation method thereof. The alloy prepared by electrochemical reduction deposition is amorphous alloy, the magnetic transformation of the alloy is not limited by the crystal transformation of materials, but is induced by strong electron correlation, so the alloy has the advantages of large magnetic phase transformation temperature range, controllable critical transformation temperature, reversibility and the like [ Wangcheng, Luxianhong, Liwei, and the like ]. In 2017, the novel FeCoNi-based high-entropy amorphous alloy with soft magnetic property is developed by taking an amorphous alloy with the component of Fe80Si9B11 as a base alloy and partially replacing Fe elements by adding Co and Ni elements, wherein the Fe26.7Co26.7Ni26.6Si9B11 high-entropy alloy has lower Hc (2A/m) and higher Bs (1.07T) [ study on the properties of the TaoJuan, FeCoNi-based soft magnetic high-entropy amorphous alloy and the corresponding high-entropy alloy [ D ] Zhengzhou university, 2017 ]. Liu Smart in 2019 and the like, and an AlCoCuFeNi0.2 high-entropy alloy is prepared by utilizing an arc melting technology, and the differences between the structure, the mechanical property and the magnetic property of the high-entropy alloy in an as-cast state and an annealing state at 900 ℃ are researched. The research shows that the alloy in the cast state and the annealing state at 900 ℃ has a BCC + FCC + ordered BCC coexisting structure, the BCC phase is a main phase, the structure is a typical dendritic structure, and the alloy has excellent soft magnetic properties. After annealing at 900 ℃, the BCC phase is converted to the FCC phase, the alloy plasticity is obviously improved, the strength and the hardness are reduced, the saturation magnetization is improved [ Liu Smart, Peng Yi, Jiang Chang Shuang, etc.. the annealing treatment has influence on the structure and the performance of AlCoCuFeNi0.2 high-entropy alloy [ J ] the metal heat treatment, 2019,44(06):108 ion 112 ].

Attempts have also been made to add various amounts of non-metallic elements to magnetic high-entropy alloys, such as 2015 chenkui et al, to study the effect of trace boron on the microstructure and properties of AlCoCrFeNiBx (x is 0,0.01,0.02 … 0.09.09, 0.10, x is mole fraction) high-entropy alloys. AlCoCrFeNi high entropy alloys exhibit a typical equiaxed grain structure with significant compositional segregation within the grain. However, with the addition of boron, the alloy exhibits a pronounced dendritic structure. Typical spinodal decomposition structures can be observed within the dendrites. The crystal structure is also changed from a B2+ BCC structure to a B2+ BCC + FCC mixed structure along with the increase of boron element. The alloy hardness is in a first-rising and second-falling trend, and is increased from 486.7HV to 502.4HV and finally is reduced to 460.7 HV; the compressive fracture strength tended to increase before x became 0.08 and then decreased. The alloy is soft magnetic, and the coercive force and saturation magnetization intensity of the alloy are reduced along with the increase of the content of the boron element, which shows that the boron element has the effect of improving the soft magnetic of the alloy [ Chen autumn, Lu Yi, Dong Yong, and the like. In 2017, the CoFeNi series high-entropy alloy is prepared in a vacuum arc melting mode for left Ting and Ting, the influence of the addition of Al, Cr, Ga and Sn elements on the saturation magnetization of the alloy is researched, and the result shows that: the Al, Cr, Ga, and Sn contribute to the improvement of Ms and Hc of the alloy CoFeMnNix; increasing the saturation magnetization of the CoFeNiMnAlx high-entropy alloy with x, reducing the saturation magnetization, and increasing the saturation magnetization to 147Am 2/kg; the saturation magnetization of the CoFeNi (AlSi) x alloy is in a linear descending trend along with the increase of the content of the element A1 and Si, and the yield strength and the hardness of the alloy are continuously increased; the addition of Co greatly improves the saturation magnetization and Curie temperature of the CoNiMnGa alloy, and shows good high-temperature use advantages [ the structure and performance of Co-Fe-Ni magnetic high-entropy alloy [ D ]. Beijing, Beijing university of science and technology, 2017:95-124 ].

At present, the preparation method of the bulk magnetic high-entropy alloy mainly adopts vacuum arc melting. For bulk materials, arc melting has a number of drawbacks, such as the inability to control the volatilization of low boiling elements when the boiling point of a major element is near or below the melting point of some other element.

Disclosure of Invention

According to the defects of the traditional preparation method of the bulk magnetic high-entropy alloy, the five-component magnetic high-entropy alloy and the preparation method thereof are provided. The invention mainly utilizes prepressing, spark plasma sintering and annealing to realize the preparation of the magnetic high-entropy alloy material by the spark plasma sintering, solves the problem of segregation in the traditional smelting process and the problem of mass production, and obtains the five-component magnetic high-entropy alloy material with excellent magnetic property and mechanical property on the basis of realizing higher density.

The technical means adopted by the invention are as follows:

the five-component magnetic high-entropy alloy material comprises the following chemical components in percentage by mass:

iron powder: 16.38-37.02 wt.%, cobalt powder: 9.5-38.65 wt.%, nickel powder: 6.16-39.63 wt.%, manganese powder: 5.69-37.62 wt.%, aluminum powder: 2.53-12.87 wt.%.

Furthermore, all the metal powder is simple substance powder, the purity is 99.5%, and the mesh number is 200-500 meshes.

The invention also provides a preparation method of the five-component magnetic high-entropy alloy, which is used for preparing the five-component magnetic high-entropy alloy material and comprises the following steps:

s1, performing ball milling on iron powder, cobalt powder, nickel powder, manganese powder and aluminum powder on a ball mill, wherein the mass ratio of grinding balls to powder is 20:1, the ball milling tank and the grinding balls are made of stainless steel materials, three grinding balls with the diameters of 1mm, 4mm and 6mm are adopted, the mass ratio of the three grinding balls is 1:3:6, the ball milling rotating speed is 300-600 r/min, the ball milling time is 10-70 h, the forward rotation and the reverse rotation alternately run, the forward rotation is stopped for 30min for 1h, the reverse rotation is stopped for 1h, and the circulation is repeated, wherein a process control agent is dropped into the ball milling process every 10h, the control agent is industrial ethanol with the analytical purity of more than or equal to 99.7%, and the dropping amount is 0.02-0.05 m L/g of metal powder;

s2: annealing the five-component magnetic high-entropy alloy powder synthesized in the step S1 in an argon environment at the temperature of 300-600 ℃ for 1-5 h, and fully removing impurities adsorbed by the five-component magnetic high-entropy alloy powder;

s3: pre-pressing the five-component magnetic high-entropy alloy powder annealed in the step S2 under the pressure of 200-500 MPa for 10-200S;

s4: carrying out discharge plasma sintering on the sample pre-pressed in the step S3, wherein the sintering temperature is 900-1050 ℃, the sintering pressure is 10-50 MPa, the temperature is increased from room temperature to the target temperature at the heating rate of 50-150 ℃/min, the temperature is kept for 10-60 min after the target sintering temperature is reached, the absolute vacuum degree is 20-50 Pa in the sintering process, and the furnace is cooled to the room temperature after the temperature is kept, and the power is cut off; removing residual impurities and burrs generated at the edges in the sintering process of the sintered body cooled to room temperature to obtain a five-element magnetic high-entropy alloy sintered body;

s5: and (4) annealing the five-component magnetic high-entropy alloy sintered body prepared in the step (S4) for 1-20 hours in an argon environment at the temperature of 300-600 ℃, and then grinding and polishing to obtain the five-component magnetic high-entropy alloy material.

Compared with the prior art, the invention has the following advantages:

according to the five-component magnetic high-entropy alloy and the preparation method thereof, Mechanical Alloying (MA) is a solid-state non-equilibrium high-energy ball milling processing technology, and alloying can be realized among high-entropy alloy elements with large melting point difference; the Spark Plasma Sintering (SPS) can be rapidly sintered to prepare high-entropy alloy, and the sintering process can inhibit the growth of crystal grains to obtain a block material with high density and uniform tissue; the prepared high-entropy alloy has excellent magnetic properties such as better saturation magnetization and lower coercive force at lower sintering temperature, the hardness and the compression strength of the high-entropy alloy have better comprehensive mechanical properties, and a sample can have better compactness in the sintering process under the condition of higher prepressure.

In conclusion, the technical scheme of the invention realizes the preparation of the magnetic high-entropy alloy material by the spark plasma sintering by utilizing the prepressing, the spark plasma sintering and the annealing, and obtains the five-component magnetic high-entropy alloy material with excellent magnetic property and mechanical property on the basis of realizing higher density. Therefore, the technical scheme of the invention overcomes the defects of the traditional preparation method of the bulk magnetic high-entropy alloy.

For the reasons, the invention can be widely popularized in the field of magnetic materials.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values.

The invention provides a five-component magnetic high-entropy alloy material, which comprises the following chemical components in percentage by mass:

Example 1

S1 ball-milling 16.38 wt.% of iron powder, 24.70 wt.% of cobalt powder, 24.59 wt.% of nickel powder, 23.02 wt.% of manganese powder and 11.31 wt.% of aluminum powder on a ball mill, wherein the mass ratio of grinding balls to powder is 20:1, the materials of a ball milling tank and the grinding balls are stainless steel, the ball milling tank and the grinding balls are three grinding balls with diameters of 1mm, 4mm and 6mm respectively, the mass ratio of the three grinding balls is 1:3:6, the ball milling rotating speed is 300r/min, the ball milling time is 10h, positive rotation and negative rotation are alternately operated, the ball milling tank stops for 30min after 1h positive rotation, then the ball milling tank rotates for 1h, and the ball milling tank are circularly reciprocated, wherein a process control agent is dripped every 10h in the ball milling process, the control agent is industrial ethanol with analytical purity of more than or equal to 99;

s2: annealing the high-entropy alloy powder synthesized in the step S1 for 1h in an argon environment at the temperature of 600 ℃, and fully removing impurities adsorbed by the high-entropy alloy powder;

s3: pre-pressing and molding the powder annealed in the step S2 under the pressure of 200MPa, and keeping the pressure for 90S;

s4: performing discharge plasma sintering (SPS) on the sample pre-pressed in the step S3, wherein the sintering temperature is 900 ℃, the sintering pressure is 50MPa, the temperature is increased from room temperature to the target temperature at the heating rate of 50 ℃/min, the temperature is kept for 50min after the target sintering temperature is reached, the absolute vacuum degree is 20Pa in the sintering process, and the sample is cooled to the room temperature along with the furnace after the temperature is kept; then removing residual impurities of the sintered body and burrs generated at the edge in the sintering process to obtain a five-element magnetic high-entropy alloy sintered body;

s5: and (4) annealing the five-component magnetic high-entropy alloy sintered body prepared in the step S4 for 1h in an argon environment at the temperature of 300 ℃, and then grinding and polishing to obtain the five-component magnetic high-entropy alloy material.

The organization and performance of the prepared five-element magnetic high-entropy alloy material are detected by an instrument used by a conventional detection means, the density of a sample can reach 97.58%, the Vickers hardness is 587HV, and the saturation magnetization and the coercive force are respectively as follows: 27Am²G and 1936A/m.

Example 2

S1, ball-milling 25.73 wt% of iron powder, 9.5 wt% of cobalt powder, 27.04 wt% of nickel powder, 25.31 wt% of manganese powder and 12.43 wt% of aluminum powder on a ball mill, wherein the mass ratio of grinding balls to powder is 20:1, the materials of a ball-milling tank and the grinding balls are stainless steel, three grinding balls with the diameters of 1mm, 4mm and 6mm are adopted, the mass ratio of the three grinding balls is 1:3:6, the ball-milling rotating speed is 400r/min, the ball-milling time is 30h, forward rotation and reverse rotation are alternately operated, the machine is stopped for 30min for 1h in forward rotation and then reverse rotation for 1h, and circulation is repeated, a process control agent is dripped every 10h in the ball-milling process, the control agent is industrial ethanol with the analytical purity of not less than 99.7%, and the dripping amount is 0.03m L/g;

s2: annealing the high-entropy alloy powder synthesized in the step S1 for 2h in an argon environment at 500 ℃, and fully removing impurities adsorbed by the high-entropy alloy powder;

s3: pre-pressing and molding the powder annealed in the step S2 under the pressure of 300MPa, and keeping the pressure for 60S;

s4: performing discharge plasma sintering (SPS) on the sample pre-pressed in the step S3, wherein the sintering temperature is 940 ℃, the sintering pressure is 10MPa, the temperature is increased from room temperature to the target temperature at the heating rate of 50-150 ℃/min, the temperature is kept for 10-60 min after the target sintering temperature is reached, the absolute vacuum degree is 30Pa in the sintering process, and the sample is cooled to the room temperature along with the furnace after the temperature is kept; then removing residual impurities of the sintered body and burrs generated at the edge in the sintering process to obtain a five-element magnetic high-entropy alloy sintered body;

s5: and (4) annealing the five-component magnetic high-entropy alloy sintered body prepared in the step (S4) for 5 hours in an argon environment at the temperature of 400 ℃, and then grinding and polishing to obtain the five-component magnetic high-entropy alloy material.

The tissue and performance of the prepared five-element magnetic high-entropy alloy material are detected by using an instrument used by a conventional detection means, the density of a sample can reach 97.64 percent, the Vickers hardness is 596HV, and the saturation magnetization and the coercive force are respectively as follows: 32.8Am²G and 1713A/m.

Example 3

S1, ball-milling 26.64 wt% of iron powder, 28.11 wt% of cobalt powder, 6.16 wt% of nickel powder, 26.21 wt% of manganese powder and 12.87 wt% of aluminum powder on a ball mill, wherein the mass ratio of grinding balls to powder is 20:1, the materials of a ball-milling tank and the grinding balls are stainless steel, three grinding balls with the diameters of 1mm, 4mm and 6mm are adopted, the mass ratio of the three grinding balls is 1:3:6, the ball-milling rotating speed is 500r/min, the ball-milling time is 50h, forward rotation and reverse rotation are alternately operated, the machine is stopped for 30min for 1h in forward rotation and then reverse rotation for 1h, and the process is cyclically reciprocated, a process control agent is dripped every 10h in the ball-milling process, the control agent is industrial ethanol with the analytical purity of not less than 99.7%, and the dripping amount is 0.04m L;

s2: annealing the high-entropy alloy powder synthesized in the step S1 for 3h in an argon environment at the temperature of 400 ℃, and fully removing impurities adsorbed by the high-entropy alloy powder;

s3: pre-pressing and molding the powder annealed in the step S2 under the pressure of 400MPa, and keeping the pressure for 30S;

s4: performing discharge plasma sintering (SPS) on the sample pre-pressed in the step S3, wherein the sintering temperature is 980 ℃, the sintering pressure is 20MPa, the temperature is increased from room temperature to the target temperature at the heating rate of 100 ℃/min, the temperature is kept for 30min after the target sintering temperature is reached, and the absolute vacuum degree is 40Pa in the sintering process; cutting off the power after the heat preservation is finished, cooling the sintered body to room temperature along with the furnace, and removing residual impurities of the sintered body and burrs generated at the edge in the sintering process to obtain a five-element magnetic high-entropy alloy sintered body;

s5, annealing the five-component magnetic high-entropy alloy sintered body prepared in the step S4 in an argon environment at 500 ℃ for 15h, and then grinding and polishing to obtain the five-component magnetic high-entropy alloy material.

The prepared five-element magnetic high-entropy alloy material is subjected to organization and performance detection by using an instrument used by a conventional detection means, the density of a sample can reach 98.56%, the Vickers hardness is 573HV, and the saturation magnetization and the coercive force are respectively as follows: 21.4Am²G and 2019A/m.

Example 4

S1, ball-milling 26.28 wt% of iron powder, 27.73 wt% of cobalt powder, 27.61 wt% of nickel powder, 5.69 wt% of manganese powder and 12.69 wt% of aluminum powder on a ball mill, wherein the mass ratio of grinding balls to powder is 20:1, the ball-milling tank and the grinding balls are made of stainless steel materials, three grinding balls with the diameters of 1mm, 4mm and 6mm are adopted, the mass ratio of the three grinding balls is 1:3:6, the ball-milling rotating speed is 600r/min, the ball-milling time is 70h, forward rotation and reverse rotation are alternately operated, the machine is stopped for 30min for 1h in forward rotation and then reverse rotation for 1h, and the process is cyclically reciprocated, a process control agent is dripped every 10h in the ball-milling process, the control agent is industrial ethanol with the analytical purity of not less than 99.7%, and the dripping amount is 0.05m L;

s2: annealing the high-entropy alloy powder synthesized in the step S1 for 4 hours in an argon environment at the temperature of 300 ℃, and fully removing impurities adsorbed by the high-entropy alloy powder;

s3: pre-pressing and molding the powder annealed in the step S2 under the pressure of 500MPa, and keeping the pressure for 150S;

s4: performing discharge plasma sintering (SPS) on the sample pre-pressed in the step S3, wherein the sintering temperature is 1020 ℃, the sintering pressure is 30MPa, the temperature is increased from room temperature to the target temperature at the heating rate of 120 ℃/min, the temperature is kept for 20min after the target sintering temperature is reached, and the absolute vacuum degree is 50Pa in the sintering process; cutting off the power after the heat preservation is finished, cooling the sintered body to room temperature along with the furnace, and removing residual impurities of the sintered body and burrs generated at the edge in the sintering process to obtain a five-element magnetic high-entropy alloy sintered body;

s5: and (4) annealing the five-component magnetic high-entropy alloy sintered body prepared in the step S4 for 10 hours in an argon environment at the temperature of 300 ℃, and then grinding and polishing to obtain the five-component magnetic high-entropy alloy material.

The tissue and performance of the prepared five-element magnetic high-entropy alloy material are detected by using an instrument used by a conventional detection means, the density of a sample can reach 98.95%, the Vickers hardness is 498HV, and the saturation magnetization and the coercive force are respectively as follows: 24Am²G and 1688A/m.

Example 5

S1 ball-milling 16.38 wt.% of iron powder, 24.70 wt.% of cobalt powder, 24.59 wt.% of nickel powder, 23.02 wt.% of manganese powder and 11.31 wt.% of aluminum powder on a ball mill, wherein the mass ratio of grinding balls to powder is 20:1, the ball-milling tank and the grinding balls are made of stainless steel, the ball-milling tank and the grinding balls are made of three grinding balls with diameters of 1mm, 4mm and 6mm respectively, the mass ratio of the three grinding balls is 1:3:6, the ball-milling rotating speed is 400r/min, the ball-milling time is 60 hours, the ball-milling tank and the grinding balls alternately run in forward rotation for 1 hour and stop for 30 minutes, then the ball-milling tank and the ball-milling tank reversely rotate for 1 hour and repeat in a circulating manner, a process control agent is dripped every 10 hours in the ball-milling process, the control agent is industrial ethanol with analytical purity of more;

The prepared five-element magnetic high-entropy alloy material is subjected to organization and performance detection by using an instrument used by a conventional detection means, the density of a sample can reach 97.63%, the Vickers hardness is 594HV, and the saturation magnetization and the coercive force are respectively as follows: 27.3Am²G and 1828A/m.

Example 6

S1, ball-milling 25.73 wt% of iron powder, 9.5 wt% of cobalt powder, 27.04 wt% of nickel powder, 25.31 wt% of manganese powder and 12.43 wt% of aluminum powder on a ball mill, wherein the mass ratio of grinding balls to powder is 20:1, the materials of a ball-milling tank and the grinding balls are stainless steel, three grinding balls with the diameters of 1mm, 4mm and 6mm are adopted, the mass ratio of the three grinding balls is 1:3:6, the ball-milling rotating speed is 500r/min, the ball-milling time is 30h, forward rotation and reverse rotation are alternately operated, the machine is stopped for 30min for 1h in forward rotation and then reverse rotation for 1h, and circulation is repeated, a process control agent is dripped every 10h in the ball-milling process, the control agent is industrial ethanol with the analytical purity of more than or equal to 99.7%, and the dripping amount is 0.04m L;

s3: pre-pressing and molding the powder annealed in the step S2 under the pressure of 500MPa, and keeping the pressure for 60S;

s4: performing discharge plasma sintering (SPS) on the sample pre-pressed in the step S3, wherein the sintering temperature is 940 ℃, the sintering pressure is 10MPa, the temperature is increased from room temperature to the target temperature at the heating rate of 50-150 ℃/min, the temperature is kept for 10-60 min after the target sintering temperature is reached, and the absolute vacuum degree in the sintering process is 30 Pa; cutting off the power after the heat preservation is finished, cooling the sintered body to room temperature along with the furnace, and removing residual impurities of the sintered body and burrs generated at the edge in the sintering process to obtain a five-element magnetic high-entropy alloy sintered body;

s5: and (4) annealing the five-component magnetic high-entropy alloy sintered body prepared in the step (S4) for 5 hours in an argon environment at the temperature of 400 ℃, and then grinding and polishing to obtain the five-component magnetic high-entropy alloy block material.

The tissue and performance of the five-element magnetic high-entropy alloy block material are detected by using an instrument used by a conventional detection means, the density of a sample can reach 98.18 percent, the Vickers hardness is 602HV, and the saturation magnetization and the coercive force are respectively as follows: 33.1Am²G and 1679A/m.

Example 7

S1 ball-milling 26.64 wt.% of iron powder, 28.11 wt.% of cobalt powder, 6.16 wt.% of nickel powder, 26.21 wt.% of manganese powder and 12.87 wt.% of aluminum powder on a ball mill, wherein the mass ratio of grinding balls to powder is 20:1, the ball-milling tank and the grinding balls are made of stainless steel, three grinding balls with the diameters of 1mm, 4mm and 6mm are adopted, the mass ratio of the three grinding balls is 1:3:6, the ball-milling rotating speed is 600r/min, the ball-milling time is 50h, forward rotation and reverse rotation are alternately operated, the machine is stopped for 30min for 1h in forward rotation and then reversed rotation for 1h, and circulation is repeated, a process control agent is dripped every 10h in the ball-milling process, the control agent is industrial ethanol with the analytical purity of not less than 99.7%, and the dripping amount is 0.05m L/g of metal;

s3: pre-pressing and molding the powder annealed in the step S2 under the pressure of 400MPa, and keeping the pressure for 200S;

s4: and (2) performing discharge plasma sintering (SPS) on the sample pre-pressed in the step S3, wherein the sintering temperature is 980 ℃, the sintering pressure is 20MPa, the temperature is increased from room temperature to the target temperature at the heating rate of 100 ℃/min, the temperature is kept for 30min after the target sintering temperature is reached, the absolute vacuum degree is 40Pa in the sintering process, and the sample is cooled to the room temperature along with the furnace after the temperature is kept. Then removing residual impurities of the sintered body and burrs generated at the edge in the sintering process to obtain a five-element magnetic high-entropy alloy sintered body;

s5: and (4) annealing the five-component magnetic high-entropy alloy sintered body prepared in the step S4 for 15h in an argon environment at 500 ℃, and then grinding and polishing to obtain the five-component magnetic high-entropy alloy material.

The prepared five-component magnetic high-entropy alloy material is subjected to organization and performance detection by using an instrument used by a conventional detection means, the density of a sample can reach 97.5 percent, the Vickers hardness is 581HV, and the saturation magnetization and the coercive force are respectively as follows: 21.3Am²G and 2021A/m.

Example 8

S1, ball-milling 26.28 wt% of iron powder, 27.73 wt% of cobalt powder, 27.61 wt% of nickel powder, 5.69 wt% of manganese powder and 12.69 wt% of aluminum powder on a ball mill, wherein the mass ratio of grinding balls to powder is 20:1, the ball-milling tank and the grinding balls are made of stainless steel materials, three grinding balls with the diameters of 1mm, 4mm and 6mm are adopted, the mass ratio of the three grinding balls is 1:3:6, the ball-milling rotating speed is 300r/min, the ball-milling time is 70h, forward rotation and reverse rotation are alternately operated, the machine is stopped for 30min for 1h in forward rotation and then reversed rotation for 1h, and circulation is repeated, a process control agent is dripped every 10h in the ball-milling process, the control agent is industrial ethanol with the analytical purity of not less than 99.7%, and the dripping amount is 0.02m L/g;

s2: annealing the high-entropy alloy powder synthesized in the step S1 for 4 hours in an argon environment at the temperature of 600 ℃, and fully removing impurities adsorbed by the high-entropy alloy powder;

s4: performing discharge plasma sintering (SPS) on the sample pre-pressed in the step S3, wherein the sintering temperature is 1020 ℃, the sintering pressure is 30MPa, the temperature is increased from room temperature to the target temperature at the heating rate of 120 ℃/min, the temperature is kept for 20min after the target sintering temperature is reached, the absolute vacuum degree is 50Pa in the sintering process, and the furnace is cooled to the room temperature after the temperature is kept; then removing residual impurities of the sintered body and burrs generated at the edge in the sintering process to obtain a five-element magnetic high-entropy alloy sintered body;

The tissue and performance of the prepared five-element magnetic high-entropy alloy material are detected by using an instrument used by a conventional detection means, the density of a sample can reach 99.13%, the Vickers hardness is 603HV, and the saturation magnetization and the coercive force are respectively as follows: 38.4Am²G and 1511A/m.

Example 9

S1, performing ball milling on iron powder 37.02 wt.%, cobalt powder 18.6 wt.%, nickel powder 18.52 wt.%, manganese powder 17.34 wt.% and aluminum powder 8.52 wt.% on a ball mill, wherein the mass ratio of grinding balls to powder is 20:1, the materials of a ball milling tank and the grinding balls are stainless steel, three grinding balls with the diameters of 1mm, 4mm and 6mm are adopted, the mass ratio of the three grinding balls is 1:3:6, the ball milling rotation speed is 500r/min, the ball milling time is 10h, forward rotation and reverse rotation are alternately performed, the machine is stopped for 30min for 1h in forward rotation and then for 1h in reverse rotation, and the process is cyclically repeated, wherein a process control agent is dropwise added every 10h in the ball milling process, the control agent is industrial ethanol with the analytical purity of not less than 99.7%, and the dropwise adding amount is 0.03m L/g metal powder;

s2, annealing the high-entropy alloy powder synthesized in the step S1 for 1h in an argon environment at the temperature of 600 ℃, and fully removing impurities adsorbed by the high-entropy alloy powder;

s3, pre-pressing and forming the powder annealed in the step S2 under the pressure of 200MPa, and keeping the pressure for 90S;

s4: performing discharge plasma sintering (SPS) on the sample pre-pressed in the step S3, wherein the sintering temperature is 1050 ℃, the sintering pressure is 40MPa, the temperature is increased from room temperature to the target temperature at the heating rate of 50 ℃/min, the temperature is kept for 50min after the target sintering temperature is reached, the absolute vacuum degree is 20Pa in the sintering process, and the sample is cooled to the room temperature along with the furnace after the temperature is kept; then removing residual impurities of the sintered body and burrs generated at the edge in the sintering process to obtain a five-element magnetic high-entropy alloy sintered body;

The prepared five-component magnetic high-entropy alloy material is subjected to organization and performance detection by using an instrument used by a conventional detection means, and a sample is compactThe degree can reach 99.22%, the Vickers hardness is 607HV, and the saturation magnetization and the coercive force are respectively as follows: 28.3Am²G and 1918A/m.

Example 10

S1, ball-milling 17.44 wt.% of iron powder, 38.65 wt.% of cobalt powder, 18.33 wt.% of nickel powder, 17.16 wt.% of manganese powder and 8.43 wt.% of aluminum powder on a ball mill, wherein the mass ratio of grinding balls to powder is 20:1, the materials of a ball milling tank and the grinding balls are stainless steel, the ball mill adopts three grinding balls with the diameters of 1mm, 4mm and 6mm respectively, the mass ratio of the three grinding balls is 1:3:6, the ball milling rotating speed is 600r/min, the ball milling time is 30h, positive rotation and negative rotation are alternately operated, the machine is stopped for 30min for 1h in positive rotation and then rotates for 1h in negative rotation, and the process is cyclically reciprocated, a process control agent is dripped every 10h in the ball milling process, the control agent is industrial ethanol with the analytical purity of not less than 99.7%, and the dripping amount is 0.05m 63;

s4: performing discharge plasma sintering (SPS) on the sample pre-pressed in the step S3, wherein the sintering temperature is 1000 ℃, the sintering pressure is 10MPa, the temperature is increased from room temperature to the target temperature at the heating rate of 70 ℃/min, the temperature is kept for 10-60 min after the target sintering temperature is reached, and the absolute vacuum degree is 30Pa in the sintering process; cutting off the power after the heat preservation is finished, cooling the sintered body to room temperature along with the furnace, and removing residual impurities of the sintered body and burrs generated at the edge in the sintering process to obtain a five-element magnetic high-entropy alloy sintered body;

The tissue and performance of the prepared five-element magnetic high-entropy alloy material are detected by an instrument used by a conventional detection means, the density of a sample can reach 98.82%, the Vickers hardness is 648HV, and the saturation magnetization and the coercive force are respectively as follows: 37.2Am²G and 1574A/m.

Example 11

S1 ball-milling 17.14 wt.% of iron powder, 18.08 wt.% of cobalt powder, 39.63 wt.% of nickel powder, 16.86 wt.% of manganese powder and 8.28 wt.% of aluminum powder on a ball mill, wherein the mass ratio of grinding balls to powder is 20:1, the ball-milling tank and the grinding balls are made of stainless steel, three grinding balls with the diameters of 1mm, 4mm and 6mm are adopted, the mass ratio of the three grinding balls is 1:3:6, the ball-milling rotating speed is 300r/min, the ball-milling time is 50h, forward rotation and reverse rotation are alternately operated, the machine is stopped for 30min for 1h in forward rotation and then reversed rotation for 1h, and the circulation is repeated, wherein a process control agent is dropwise added every 10h in the ball-milling process, the control agent is industrial ethanol with the analytical purity of not less than 99.7%, and the dropwise adding amount is 0.02m L/;

s4: performing discharge plasma sintering (SPS) on the sample pre-pressed in the step S3, wherein the sintering temperature is 950 ℃, the sintering pressure is 20MPa, the absolute vacuum degree is 40Pa, the temperature is increased from room temperature to the target temperature at the heating rate of 100 ℃/min, the temperature is kept for 30min after the target sintering temperature is reached, and the sample is cooled to the room temperature along with the furnace after the temperature is kept; then removing residual impurities of the sintered body and burrs generated at the edge in the sintering process to obtain a five-element magnetic high-entropy alloy sintered body;

The organization and performance of the prepared five-element magnetic high-entropy alloy material are detected by an instrument used by a conventional detection means, the density of a sample can reach 98.36%, the Vickers hardness is 583HV, and the saturation magnetization and the coercive force are respectively as follows: 25.1Am²And 1991A/m.

Example 12

S1, ball-milling 17.38 wt.% of iron powder, 18.34 wt.% of cobalt powder, 18.27 wt.% of nickel powder, 37.62 wt.% of manganese powder and 8.4 wt.% of aluminum powder on a ball mill, wherein the mass ratio of grinding balls to powder is 20:1, the ball-milling tank and the grinding balls are made of stainless steel, three grinding balls with the diameters of 1mm, 4mm and 6mm are adopted, the mass ratio of the three grinding balls is 1:3:6, the ball-milling rotating speed is 400r/min, the ball-milling time is 70h, forward rotation and reverse rotation are alternately operated, the machine is stopped for 30min for 1h in forward rotation and then reversed rotation for 1h, and circulation is repeated, wherein a process control agent is dropwise added every 10h in the ball-milling process, the control agent is industrial ethanol with the analytical purity of not less than 99.7%, and the dropwise addition amount is 0.03m L/;

s4: and (2) performing discharge plasma sintering (SPS) on the sample pre-pressed in the step S3, wherein the sintering temperature is 900 ℃, the sintering pressure is 30MPa, the temperature is increased from room temperature to the target temperature at the heating rate of 120 ℃/min, the temperature is kept for 20min after the target sintering temperature is reached, the absolute vacuum degree is 50Pa in the sintering process, and the sample is cooled to the room temperature along with the furnace after the temperature is kept. Then removing residual impurities of the sintered body and burrs generated at the edge in the sintering process to obtain a five-element magnetic high-entropy alloy sintered body;

The tissue and performance of the prepared five-element magnetic high-entropy alloy material are detected by using an instrument used by a conventional detection means, the density of a sample can reach 97.95 percent, the Vickers hardness is 631HV, and the saturation magnetization and the coercive force are respectively as follows: 15.3Am²G and 2213A/m.

Example 13

S1, performing ball milling on iron powder 37.02 wt.%, cobalt powder 18.6 wt.%, nickel powder 18.52 wt.%, manganese powder 17.34 wt.% and aluminum powder 8.52 wt.% on a ball mill, wherein the mass ratio of grinding balls to powder is 20:1, the materials of a ball milling tank and the grinding balls are stainless steel, three grinding balls with the diameters of 1mm, 4mm and 6mm are adopted, the mass ratio of the three grinding balls is 1:3:6, the ball milling rotation speed is 600r/min, the ball milling time is 10h, forward rotation and reverse rotation are alternately performed, the machine is stopped for 30min for 1h in forward rotation and then for 1h in reverse rotation, and the process is cyclically repeated, wherein a process control agent is dropwise added every 10h in the ball milling process, the control agent is industrial ethanol with the analytical purity of not less than 99.7%, and the dropwise adding amount is 0.05m L/g of metal powder;

s2: annealing the high-entropy alloy powder synthesized in the step S1 for 5 hours in an argon environment at the temperature of 600 ℃, and fully removing impurities adsorbed by the high-entropy alloy powder;

s3: pre-pressing and molding the powder annealed in the step S2 under the pressure of 200MPa, and keeping the pressure for 30S;

The tissue and performance of the prepared five-element magnetic high-entropy alloy material are detected by using an instrument used by a conventional detection means, the density of a sample can reach 99.31 percent, the Vickers hardness is 606HV, and the saturation magnetization and the coercive force are respectively as follows: 39.1Am²G and 1605A/m.

Example 14

S1, performing ball milling on 17.44 wt.% of iron powder, 38.65 wt.% of cobalt powder, 18.33 wt.% of nickel powder, 17.16 wt.% of manganese powder and 8.43 wt.% of aluminum powder on a ball mill, wherein the mass ratio of grinding balls to powder is 20:1, the materials of a ball milling tank and the grinding balls are stainless steel, three grinding balls with the diameters of 1mm, 4mm and 6mm are adopted, the mass ratio of the three grinding balls is 1:3:6, the ball milling rotating speed is 300r/min, the ball milling time is 30h, the positive rotation and the negative rotation are alternately operated, the machine is stopped for 30min for 1h in the positive rotation and then is reversed for 1h, and the circulation is repeated, wherein a process control agent is dropwise added every 10h in the ball milling process, the control agent is industrial ethanol with the analytical purity of not less than 99.7%, and the dropping amount is 0.02m L;

s4: performing discharge plasma sintering (SPS) on the sample pre-pressed in the step S3, wherein the sintering temperature is 1000 ℃, the sintering pressure is 10MPa, the temperature is increased from room temperature to the target temperature at the heating rate of 150 ℃/min, the temperature is kept for 10-60 min after the target sintering temperature is reached, and the absolute vacuum degree is 30Pa in the sintering process; cutting off the power after the heat preservation is finished, cooling the sintered body to room temperature along with the furnace, and removing residual impurities of the sintered body and burrs generated at the edge in the sintering process to obtain a five-element magnetic high-entropy alloy sintered body;

The tissue and performance of the prepared five-element magnetic high-entropy alloy material are detected by using an instrument used by a conventional detection means, the density of a sample can reach 98.31 percent, the Vickers hardness is 647HV, and the saturation magnetization and the coercive force are respectively as follows: 39.1Am²G and 1473A/m.

Example 15

S1, ball-milling 17.14 wt.% of iron powder, 18.08 wt.% of cobalt powder, 39.63 wt.% of nickel powder, 16.86 wt.% of manganese powder and 8.28 wt.% of aluminum powder on a ball mill, wherein the mass ratio of grinding balls to powder is 20:1, the ball-milling tank and the grinding balls are made of stainless steel materials, three grinding balls with the diameters of 1mm, 4mm and 6mm are adopted, the mass ratio of the three grinding balls is 1:3:6, the ball-milling rotating speed is 400r/min, the ball-milling time is 50h, forward rotation and reverse rotation are alternately operated, the machine is stopped for 30min for 1h in forward rotation and then reversed for 1h, and the process is cyclically reciprocated, a process control agent is dripped every 10h in the ball-milling process, the control agent is industrial ethanol with the analytical purity of not less than 99.7%, and the dripping amount is 0.03m L/;

s4: performing discharge plasma sintering (SPS) on the sample pre-pressed in the step S3, wherein the sintering temperature is 950 ℃, the sintering pressure is 50MPa, the absolute vacuum degree is 40Pa, the temperature is increased from room temperature to the target temperature at the heating rate of 100 ℃/min, the temperature is kept for 30min after the target sintering temperature is reached, and the temperature is cooled to the room temperature along with the furnace after the temperature is kept; then removing residual impurities of the sintered body and burrs generated at the edge in the sintering process to obtain a five-element magnetic high-entropy alloy sintered body;

The tissue and performance of the prepared five-element magnetic high-entropy alloy material are detected by using an instrument used by a conventional detection means, the density of a sample can reach 98.78%, the Vickers hardness is 597HV, and the saturation magnetization and the coercive force are respectively as follows: 28.1Am²G and 1905A/m.

Example 16

S1, ball-milling 17.38 wt.% of iron powder, 18.34 wt.% of cobalt powder, 18.27 wt.% of nickel powder, 37.62 wt.% of manganese powder and 8.4 wt.% of aluminum powder on a ball mill, wherein the mass ratio of grinding balls to powder is 20:1, the materials of a ball-milling tank and the grinding balls are stainless steel, the ball-milling tank and the grinding balls are three grinding balls with the diameters of 1mm, 4mm and 6mm respectively, the mass ratio of the three grinding balls is 1:3:6, the ball-milling rotating speed is 500r/min, the ball-milling time is 70h, positive rotation and negative rotation are alternately operated, the ball-milling tank stops for 30min after 1h of positive rotation, then rotates for 1h, and circularly reciprocates, a process control agent is dripped every 10h in the ball-milling process, the control agent is industrial ethanol with the analytical purity of more than or equal to 99.7%, and the;

s4: and (2) performing discharge plasma sintering (SPS) on the sample pre-pressed in the step S3, wherein the sintering temperature is 900 ℃, the sintering pressure is 30MPa, the temperature is increased from room temperature to the target temperature at the heating rate of 120 ℃/min, the temperature is maintained for 60min after the target sintering temperature is reached, the absolute vacuum degree is 50Pa in the sintering process, and the sample is cooled to the room temperature along with the furnace after the temperature is maintained: then removing residual impurities of the sintered body and burrs generated at the edge in the sintering process to obtain a five-element magnetic high-entropy alloy sintered body:

s5: and (4) annealing the five-component magnetic high-entropy alloy sintered body prepared in the step (S4) at the temperature of 300 ℃ in an argon environment for 10 hours, and then grinding and polishing to obtain the five-component magnetic high-entropy alloy block material.

The instrument used by a conventional detection means is used for detecting the organization and the performance of the five-element magnetic high-entropy alloy block material, the density of a sample can reach 98.42 percent, the Vickers hardness is 605HV, and the saturation magnetization and the coercive force are respectively as follows: 16.2Am²G and 2132A/m.

Example 17

S1, performing ball milling on 23.83 wt.% of iron powder, 25.15 wt.% of cobalt powder, 25.04 wt.% of nickel powder, 23.44 wt.% of manganese powder and 2.53 wt.% of aluminum powder on a ball mill, wherein the mass ratio of grinding balls to powder is 20:1, the materials of a ball milling tank and the grinding balls are stainless steel, the ball milling tank and the grinding balls are three grinding balls with the diameters of 1mm, 4mm and 6mm respectively, the mass ratio of the three grinding balls is 1:3:6, the ball milling rotating speed is 300r/min, the ball milling time is 10h, forward rotation and reverse rotation are alternately performed, the machine is stopped for 30min for 1h in forward rotation and then reverse rotation is performed for 1h, and the process control agent is dripped every 10h in the ball milling process, is industrial ethanol with the analytical purity of not less than 99.7%, and the dripping amount is 0.03m L/g;

s4: performing discharge plasma sintering (SPS) on the sample pre-pressed in the step S3, wherein the sintering temperature is 900 ℃, the sintering pressure is 40MPa, the temperature is increased from room temperature to the target temperature at the heating rate of 50 ℃/min, the temperature is kept for 10min after the target sintering temperature is reached, the absolute vacuum degree is 20Pa in the sintering process, and the sample is cooled to the room temperature along with the furnace after the temperature is kept; then removing residual impurities of the sintered body and burrs generated at the edge in the sintering process to obtain a five-element magnetic high-entropy alloy sintered body;

The tissue and performance of the prepared five-element magnetic high-entropy alloy material are detected by using an instrument used by a conventional detection means, the density of a sample can reach 98.66%, the Vickers hardness is 527HV, and the saturation magnetization and the coercive force are respectively as follows: 21Am²G and 4132A/m.

Example 18

S1, ball-milling 21.42 wt.% of iron powder, 22.6 wt.% of cobalt powder, 22.5 wt.% of nickel powder, 21.1 wt.% of manganese powder and 12.41 wt.% of aluminum powder on a ball mill, wherein the mass ratio of grinding balls to powder is 20:1, the ball-milling tank and the grinding balls are made of stainless steel materials, three grinding balls with the diameters of 1mm, 4mm and 6mm are adopted, the mass ratio of the three grinding balls is 1:3:6, the ball-milling rotating speed is 500r/min, the ball-milling time is 70h, forward rotation and reverse rotation are alternately operated, the machine is stopped for 30min for 1h in forward rotation and then reversed rotation for 1h, and circulation is repeated, a process control agent is dripped every 10h in the ball-milling process, the control agent is industrial ethanol with the analytical purity of not less than 99.7%, and the dripping amount is 0.02m L/g;

s2: annealing the high-entropy alloy powder synthesized in the step S1 for 1h in an argon environment at 500 ℃, and fully removing impurities adsorbed by the high-entropy alloy powder;

s4: and (2) performing discharge plasma sintering (SPS) on the sample pre-pressed in the step S3, wherein the sintering temperature is 950 ℃, the sintering pressure is 30MPa, the temperature is increased from room temperature to the target temperature at the heating rate of 120 ℃/min, the temperature is kept for 20min after the target sintering temperature is reached, the absolute vacuum degree is 30Pa in the sintering process, and the sample is cooled to the room temperature along with the furnace after the temperature is kept. Then removing residual impurities of the sintered body and burrs generated at the edge in the sintering process to obtain a five-element magnetic high-entropy alloy sintered body;

The structure and performance of the prepared five-element magnetic high-entropy alloy material are detected by using an instrument used by a conventional detection means, the density of a sample can reach 98.86%, the Vickers hardness is 467HV, and the saturation magnetization and the coercive force are respectively as follows: 41.5Am²G and 2213A/m.

Example 19

S1, performing ball milling on iron powder 23.83 wt.%, cobalt powder 25.15 wt.%, nickel powder 25.04 wt.%, manganese powder 23.44 wt.% and aluminum powder 2.53 wt.% on a ball mill, wherein the mass ratio of grinding balls to powder is 20:1, the materials of a ball milling tank and the grinding balls are stainless steel, three grinding balls with the diameters of 1mm, 4mm and 6mm are adopted, the mass ratio of the three grinding balls is 1:3:6, the ball milling rotation speed is 300r/min, the ball milling time is 10 hours, the positive rotation and the negative rotation are alternately operated, the machine is stopped for 30min for 1 hour for positive rotation and then for 1 hour for negative rotation, and the circulation is repeated, wherein a process control agent is dropwise added every 10 hours in the ball milling process, the control agent is industrial ethanol with the analytical purity of not less than 99.7%, and the dropping amount is 0.03m L/g of metal powder;

s4: performing discharge plasma sintering (SPS) on the sample pre-pressed in the step S3, wherein the sintering temperature is 1050 ℃, the sintering pressure is 40MPa, the temperature is increased from room temperature to the target temperature at the heating rate of 50 ℃/min, the temperature is kept for 10min after the target sintering temperature is reached, the absolute vacuum degree is 20Pa in the sintering process, and the sample is cooled to the room temperature along with the furnace after the temperature is kept; then removing residual impurities of the sintered body and burrs generated at the edge in the sintering process to obtain a five-element magnetic high-entropy alloy sintered body;

The tissue and performance of the five-element magnetic high-entropy alloy material are detected by using an instrument used by a conventional detection means, the density of a sample can reach 99.17%, the Vickers hardness is 538HV, and the saturation magnetization and the coercive force are respectively as follows: 24Am²G and 4025A/m.

Example 20

s4: performing discharge plasma sintering (SPS) on the sample pre-pressed in the step S3, wherein the sintering temperature is 950 ℃, the sintering pressure is 30MPa, the temperature is increased from room temperature to the target temperature at the heating rate of 120 ℃/min, the temperature is kept for 20min after the target sintering temperature is reached, the absolute vacuum degree is 30Pa in the sintering process, and the sample is cooled to the room temperature along with the furnace after the temperature is kept; then removing residual impurities of the sintered body and burrs generated at the edge in the sintering process to obtain a five-element magnetic high-entropy alloy sintered body;

s5: and (4) annealing the five-component magnetic high-entropy alloy sintered body prepared in the step S4 for 10 hours in an argon environment at 600 ℃, and then grinding and polishing to obtain the five-component magnetic high-entropy alloy block material.

The instrument used by the conventional detection means is used for detecting the structure and the performance of the five-component magnetic high-entropy alloy block material, the density of the sample can reach 99.04 percent, and the Vickers density can reachThe hardness is 531HV, and the saturation magnetization and the coercive force are respectively as follows: 43Am²G and 2117A/m.

Example 21

s5: and (4) annealing the five-component magnetic high-entropy alloy sintered body prepared in the step S4 for 20 hours in an argon environment at the temperature of 400 ℃, and then grinding and polishing to obtain the five-component magnetic high-entropy alloy material.

The tissue and performance of the five-element magnetic high-entropy alloy material are detected by using an instrument used by a conventional detection means, the density of a sample can reach 98.97%, the Vickers hardness is 531HV, and the saturation magnetization and the coercive force are respectively as follows: 23.5Am2/g and 4034A/m.

From examples 1 to 21, it can be seen that the changes of sintering temperature, sintering pressure and elements have a large influence on the performance of the material, and the influence of the mill rotation speed, the running time, the ball mass ratio, the alcohol addition amount, the pre-pressing and pressure-holding time, the temperature rise rate and the vacuum degree on the performance of the high-entropy alloy sintered body is small.

It can be seen from examples 2 and 5 that the powder compactness is increased with the increase of the pre-pressure, which results in the compactness of the five-component magnetic high-entropy alloy sintered body being increased.

It can be seen from examples 4 and 8 that the density, the vickers hardness and the magnetic property of the high-entropy alloy sintered body are improved along with the increase of the annealing temperature, and the impression of the annealing time on the properties of the sintered body is smaller.

It is understood from examples 17 and 21 that the densification and the vickers hardness of the high-entropy alloy sintered body are slightly improved as the powder annealing time is increased.

It can be seen from examples 11 and 15 that as the sintering pressure increases, the saturation magnetization of the high-entropy alloy sintered body increases, while the coercivity decreases, and the density and hardness increase slightly.

From examples 17 and 19, it can be seen that the densification, hardness and saturation magnetization of the material increase with the increase of the sintering temperature.

It can be seen from examples 1 and 9 that the density and hardness of the high-entropy alloy increase with the increase of the Fe content, and the influence on the magnetic performance is small.

From examples 2 and 10, it can be seen that the density, hardness and magnetic properties of the high entropy alloy all increase with increasing Co content.

It is understood from examples 3 and 11 that as the content of Ni element increases, the hardness and saturation magnetization increase, and the effect on the densification is small.

It is understood from examples 4 and 12 that the hardness of the sintered high-entropy alloy increases with the addition of Mn element, the saturation magnetization decreases, and the effect on the densification is small.

It will be apparent to those skilled in the art from this disclosure that many changes and modifications can be made, or equivalents modified, in the embodiments of the invention without departing from the scope of the invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention shall still fall within the protection scope of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.

Claims

1. The five-component magnetic high-entropy alloy material is characterized by comprising the following chemical components in percentage by mass:

2. The five-element magnetic high-entropy alloy material of claim 1, wherein: all the metal powder is simple substance powder, the purity is 99.5%, and the mesh number is 200-500 meshes.

3. A preparation method of a five-element magnetic high-entropy alloy, which is used for preparing the five-element magnetic high-entropy alloy material as claimed in any one of claims 1-2, and is characterized by comprising the following steps: