CN105154702A - Aluminum-based amorphous/high-entropy alloy composite and preparation method thereof - Google Patents
Aluminum-based amorphous/high-entropy alloy composite and preparation method thereof Download PDFInfo
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Abstract
The invention relates to an aluminum-based amorphous/high-entropy alloy composite and a preparation method thereof, belonging to the field of metal composites. The composite is relatively low in density and high in compressive strength and has certain deformability. The preparation method comprises the steps of placing metal powder of Al, Cu and Ti or Al, Fe and Ti or Al, Ni and Ti into a ball milling tank, injecting methylbenzene from a glove box with an Ar atmosphere to the ball milling tank, taking all the components out of the glove box after sealing the tank, and carrying out ball milling to obtain aluminum-based amorphous powder; preparing an original material from Al, Co, Cr, Fe and Ni metal blocks, and carrying out alloy smelting in vacuum by taking Ar as a protective gas to obtain a mother alloy ingot of AlCoCrFeNi high-entropy alloy; atomizing the obtained mother alloy ingot, and screening to obtain spherical high-entropy alloy powder with the particle size of 20-100mu m; and after carrying out ball milling and mixing on the obtained aluminum-based amorphous powder and the high-entropy alloy powder, placing the mixture into a hard alloy die to sinter to obtain the aluminum-based amorphous/high-entropy alloy composite.
Description
Technical field
The present invention relates to a kind of aluminium-based amorphous alloy/high-entropy alloy matrix material and preparation method, belong to metal composite field.
Background technology
Density is low, intensity is high owing to having for al based amorphous alloy, receives the very big concern of vast researcher.Research shows, be the non-crystaline amorphous metal of 84 ~ 86% containing aluminium atomic percent, its tensile strength can reach more than 1000MPa, is 2 ~ 4 times of conventional aluminum strength of alloy (about 600MPa).
When in aluminium-based amorphous alloy matrix during a small amount of α of Dispersed precipitate-Al nanoparticle, its intensity, up to 1560MPa, is 1.5 times of single-phase amorphous alloy intensity, and the Dispersed precipitate of appropriate α-Al nanoparticle can further improve intensity and the plasticity of al based amorphous alloy.The al based amorphous alloy that nanocrystal strengthens mutually, its intensity can meet or exceed the intensity of steel, and density is less than 40% of steel, thus has broad application prospects.
Because the amorphous formation ability of al based amorphous alloy is low, the overall dimension that flash set technology obtains amorphous sample is only 1mm, far can not meet application demand, and powder metallurgy technology is prepare bulk al based amorphous alloy to provide new approach.Discharge plasma sintering (SPS) has the features such as temperature rise rate is fast, sintering time is short, weave construction is controlled, energy-conserving and environment-protective, be applicable to very much the sintering of amorphous powdered alloy, can be used to the limitation of size breaking through non-crystaline amorphous metal further, prepare the block amorphous alloy that relative density is high.Although the current al based amorphous alloy intensity prepared by discharge plasma sintering method is generally at more than 1000MPa, its deformability is poor, and strain is general below 2%.And its deformability can be increased by the method for additional Second Phase Particle at present.General added particle is pure metal particles, such as aluminium, copper and iron particle etc.Although this type of particle can improve the deformability of matrix material, but because self-strength is lower, cause the intensity of matrix material to compare al based amorphous alloy to have and reduce significantly, the intensity of such as aluminium-based amorphous alloy/aluminium powder matrix material is generally at below 600MPa.
Summary of the invention
The problem causing composite material strength low for additional Second Phase Particle enhancing aluminium-based amorphous alloy matrix material deformability, an object of the present invention is to provide a kind of aluminium-based amorphous alloy/high-entropy alloy matrix material, described composite density is lower, ultimate compression strength is high, and has certain deformability.
Two of object of the present invention is the preparation method providing a kind of described aluminium-based amorphous alloy/high-entropy alloy matrix material, described method obtains al based amorphous alloy powder by mechanical alloying, utilize aerosolization method to obtain high-entropy alloy powder, then obtain aluminium-based amorphous alloy/high-entropy alloy matrix material by discharge plasma sintering.
The object of the invention is to be achieved through the following technical solutions.
A kind of aluminium-based amorphous alloy/high-entropy alloy matrix material, in the volume of described matrix material for 100%, its each moiety and volume fraction are: aluminium-based amorphous alloy 25 ~ 50%, high-entropy alloy 50 ~ 75%.
Described aluminium-based amorphous alloy is Al-Cu-Ti, Al-Fe-Ti or Al-Ni-Ti prepared by mechanical alloying.
Described high-entropy alloy is the AlCoCrFeNi utilizing Powder In Argon Atomization to prepare.
A preparation method for aluminium-based amorphous alloy of the present invention/high-entropy alloy matrix material, described method steps is as follows;
Al, Cu and Ti metal-powder is pressed atomic percent 65:16.5:18.5 or Al by step 1., Fe and Ti metal-powder loads in ball grinder according to atomic percent 88:6:6 according to atomic percent 70:25:5 or Al, Ni and Ti metal-powder, and ratio of grinding media to material is 10 ~ 20:1; In ball grinder, 6 ~ 10ml toluene is injected as Engineering Control agent in the glove box of Ar atmosphere, and sealed cans; Load take out ball grinder from glove box after in ball mill, rotational speed of ball-mill is 600 ~ 800r/min, and Ball-milling Time is 25 ~ 35h, obtains aluminium-based amorphous alloy powder;
Al, Co, Cr, Fe and Ni metal blocks 0.4 ~ 1.0:1.0 in molar ratio ~ 1.6:1.0:1.0:1.0 of purity>=99.9% is made into starting materials, in vacuum tightness 2.5 × 10 by step 2.
-3~ 5.0 × 10
-4under Pa, using argon gas as shielding gas, and under agitation melting 10 ~ 15min, obtain aluminium alloy; Aluminium alloy is cooled, obtains alloy pig; By the alloy pig upset obtained, repeat melting more than 4 times, obtain the master alloy ingot of AlCoCrFeNi high-entropy alloy; Master alloy ingot is loaded in vacuum metal powder by atomization stove, it is 100 ~ 200 DEG C in superheating temperature, be atomized under atomization air pressure 5 ~ 10MPa condition, and the powder particle particle diameter after atomization is screened, obtain the spherical high-entropy alloy powder that particle diameter is 20 ~ 100 μm;
The al based amorphous alloy powder that step 1 obtains by step 3. and the high-entropy alloy powder that step 2 obtains load in ball grinder, and in the glove box of Ar atmosphere sealed cans, load take out ball grinder from glove box after in ball mill, do not add ball-milling medium, mix 10 ~ 15h under drum's speed of rotation is 600 ~ 800r/min after, obtain aluminium-based amorphous alloy/high-entropy alloy mixed powder;
The aluminium-based amorphous alloy that step 3 obtains by step 4./high-entropy alloy mixed powder loads in sintered-carbide die, utilize discharge plasma sintering technique, be 100 ~ 150 DEG C/min at temperature rise rate, sintering temperature is 550 ~ 600 DEG C, pressure is sinter under 300 ~ 400MPa, drop to room temperature after insulation 5 ~ 10min, obtain described aluminium-based amorphous alloy/high-entropy alloy matrix material.
Described Al, Cu, Fe, Ni, Ti metal-powder purity >=99.5%, particle diameter≤50 μm.
Beneficial effect:
(1) aluminium-based amorphous alloy of the present invention/high-entropy alloy matrix material relative density >=98%, ultimate compression strength >=2800Mpa, and there is certain deformability.In described matrix material, high-entropy alloy is the class new metallic material that newly-developed gets up, there is excellent comprehensive mechanical property, as high strength, high rigidity etc., in described matrix material, its volume fraction is 50 ~ 75%, significantly can increase the intensity of matrix material.
(2) the method for the invention utilizes mechanical alloying ball milling Al-Cu-Ti or Al-Fe-Ti or Al-Ni-Ti powder, and the amorphous powder pole of figure obtained is irregular, has higher surfactivity; And be spherical by the high-entropy alloy powder that Powder In Argon Atomization prepares, surface almost non-oxidation phenomenon, these two kinds of powder are according to having good sintering character after the mixing of certain volume mark; In discharge plasma sintering process, sintered-carbide die is adopted to replace traditional graphite jig, pressure during sintering can be improved, be conducive to the relative density improving sintered specimen, thus prepare aluminium-based amorphous alloy/high-entropy alloy matrix material that ultimate compression strength is high, relative density is high.
Accompanying drawing explanation
Fig. 1 is X-ray diffraction (XRD) figure of aluminium-based amorphous alloy/high-entropy alloy matrix material prepared by embodiment 1.
Fig. 2 is low power scanning electronic microscope (SEM) figure of aluminium-based amorphous alloy/high-entropy alloy matrix material prepared by embodiment 1.
Fig. 3 is high power scanning electronic microscope (SEM) figure of aluminium-based amorphous alloy/high-entropy alloy matrix material prepared by embodiment 1.
Fig. 4 is the stress-strain curve of aluminium-based amorphous alloy/high-entropy alloy matrix material prepared by embodiment 1.
Embodiment
Below in conjunction with specific embodiment, the present invention is further elaborated.
In following examples:
Instrument equipment:
Ball mill: SPEX8000D, high energy ball mill, the U.S.;
Arc-melting furnace: DHL-400, high vacuum non-consumable arc-melting furnace, CAS Shenyang Scientific Instruments Co., Ltd.;
Vacuum metal powder by atomization stove: homemade vacuum metal atomization powder process stove, can prepare the metal alloy powders with better sphericity;
Discharge plasma sintering stove: Model1050, Japanese SumitomoCoalMining;
Sintered-carbide die: model YG15 sintered-carbide die.
Sign to prepared aluminium-based amorphous alloy/high-entropy alloy matrix material carries out:
(1) material phase analysis: adopt German BrukerAXS company D8advanceX x ray diffractometer x to carry out material phase analysis, operating voltage and electric current are respectively 40KV and 40mA, x-ray source is CuK α (λ=0.1542nm) ray, sweep velocity is 0.2sec/step, and scanning step is 0.02 °/step;
(2) morphology characterization: adopt the HITACHIS4800 type cold field emission scanning electronic microscope of HIT to carry out microscopic appearance sign, secondary electron imaging, operating voltage is 15kV;
(3) quasistatic compression test: adopt CMT4305 type computer electronic universal testing machine to carry out the axial quasistatic compression test of room temperature, it is 4mm that test sample makes diameter according to the relevant regulations in metallic substance room temperature compression testing method (GB-T7314-2005) national standard, the cylindrical sample of height 8mm, testing the trier strain rate adopted is 10
-3s
-1, record the ultimate compression strength of sample;
(4) relative density test: utilize Archimedes's drainage to record the relative density of sample.
Embodiment 1
(1) by purity >=99.5%, Al, Cu and Ti metal-powder of particle diameter≤50 μm is pressed atomic percent 65:16.5:18.5 and is loaded in ball grinder, and ratio of grinding media to material is 10:1, in the glove box of Ar atmosphere, inject 6ml toluene in ball grinder, and sealed cans; Load take out ball grinder from glove box after in ball mill, ball milling 25h under the rotating speed of 800r/min, obtains aluminium-based amorphous alloy powder;
(2) by Al, Co, Cr, Fe and Ni metal blocks of purity>=99.9% in molar ratio 0.4:1.6:1.0:1.0:1.0 be made into starting materials, in vacuum tightness 2.5 × 10
-3under Pa, using argon gas as shielding gas, and under agitation and under agitation melting 15min, obtain aluminium alloy; Aluminium alloy is cooled, obtains alloy pig; By the alloy pig upset obtained, repeat melting 4 times, obtain the master alloy ingot of AlCoCrFeNi high-entropy alloy; The master alloy ingot for preparing is loaded in vacuum metal powder by atomization stove, be 100 DEG C in superheating temperature, be atomized under atomization air pressure 5MPa condition, utilize vibrating screen classifier to obtain size distribution at the spherical high-entropy alloy powder of 20 ~ 100 μm;
(3) high-entropy alloy powder that al based amorphous alloy powder step (1) obtained and step (2) obtain loads in ball grinder according to the volume ratio of 1:3, and in the glove box of Ar atmosphere sealed cans, load take out ball grinder from glove box after in ball mill, do not add ball-milling medium, mix 15h under drum's speed of rotation is 600r/min after, obtain aluminium-based amorphous alloy/high-entropy alloy mixed powder;
(4) aluminium-based amorphous alloy step (3) obtained/high-entropy alloy mixed powder loads in YG15 sintered-carbide die, then discharge plasma sintering technique is utilized, be 100 DEG C/min at temperature rise rate, sintering temperature is 600 DEG C, pressure is sinter under 300MPa, insulation 5min, then drops to room temperature, obtains aluminium-based amorphous alloy/high-entropy alloy matrix material.
The sign that aluminium-based amorphous alloy/high-entropy alloy matrix material carries out prepared the present embodiment is as follows:
Fig. 1 is the XRD figure of prepared matrix material, wherein Al
3ti, AlCu
2ti and Cu
3ti phase is Al base amorphous generation crystallization phenomenon and the Crystallization Phases produced in preparation process, and body-centered cubic BCC and face-centered cubic FCC phase are then mainly high-entropy alloy diffraction peak in matrix material.Fig. 2 and Fig. 3 is the prepared SEM figure of matrix material under different amplification, can see that materials microstructure is obvious two-phase, Al base noncrystal substrate phase and high-entropy alloy particle, wherein Al base amorphous almost densification completely, high-entropy alloy particle still keeps spheroidal, and two-phase interface combines good.From Fig. 3 high power SEM figure, can find to there is obvious transition layer between the two phases, thickness is about 5 μm.The relative density utilizing Archimedes's drainage to record matrix material is 98.3%.Fig. 4 is the stress-strain(ed) curve of prepared matrix material, and described matrix material ultimate compression strength reaches 3122MPa, and comprehensive mechanical property is excellent.
Embodiment 2
(1) by purity >=99.5%, Al, Fe and Ti metal-powder of particle diameter≤50 μm loads in ball grinder according to atomic percent 70:25:5, and ratio of grinding media to material is 15:1, in the glove box of Ar atmosphere, inject 10ml toluene in ball grinder, and sealed cans; Load take out ball grinder from glove box after in ball mill, ball milling 35h under the rotating speed of 600r/min, obtains aluminium-based amorphous alloy powder;
(2) by Al, Co, Cr, Fe and Ni metal blocks of purity>=99.9% in molar ratio 0.4:1.6:1.0:1.0:1.0 be made into starting materials, in vacuum tightness 1.0 × 10
-4under Pa, using argon gas as shielding gas, and under agitation and under agitation melting 10min, obtain aluminium alloy; Aluminium alloy is cooled, obtains alloy pig; By the alloy pig upset obtained, repeat melting 4 times, obtain the master alloy ingot of AlCoCrFeNi high-entropy alloy; The master alloy ingot for preparing is loaded in vacuum metal powder by atomization stove, be 200 DEG C in superheating temperature, be atomized under atomization air pressure 10MPa condition, utilize vibrating screen classifier to obtain size distribution at the spherical high-entropy alloy powder of 20 ~ 100 μm;
(3) high-entropy alloy powder that al based amorphous alloy powder step (1) obtained and step (2) obtain loads in ball grinder according to the volume ratio of 2:3, and in the glove box of Ar atmosphere sealed cans, load take out ball grinder from glove box after in ball mill, do not add ball-milling medium, mix 10h under drum's speed of rotation is 800r/min after, obtain aluminium-based amorphous alloy/high-entropy alloy mixed powder;
(4) aluminium-based amorphous alloy step (3) obtained/high-entropy alloy mixed powder loads in YG15 sintered-carbide die, then discharge plasma sintering technique is utilized, be 100 DEG C/min at temperature rise rate, sintering temperature is 550 DEG C, pressure is sinter under 400MPa, insulation 10min, then drops to room temperature, obtains aluminium-based amorphous alloy/high-entropy alloy matrix material.
The sign that aluminium-based amorphous alloy/high-entropy alloy matrix material carries out prepared the present embodiment is as follows:
From the XRD figure of prepared matrix material, wherein Al
3ti, Al
5fe
2and Al
13fe
4for Al base amorphous generation crystallization phenomenon and the Crystallization Phases produced in preparation process, body-centered cubic BCC and face-centered cubic FCC phase are then mainly high-entropy alloy diffraction peak in matrix material.Known according to the SEM figure of matrix material, materials microstructure is obvious two-phase, Al base noncrystal substrate phase and high-entropy alloy particle, and wherein Al base amorphous almost densification completely, high-entropy alloy particle still keeps spheroidal, and two-phase interface combines good.In high power SEM figure, can find to there is obvious transition layer between the two phases, thickness is about 5 μm.The relative density utilizing Archimedes's drainage to record matrix material is 99.4%.Can obtain matrix material ultimate compression strength by quasistatic compression test reaches for 3015MPa, and comprehensive mechanical property is excellent.
Embodiment 3
(1) by purity >=99.5%, Al, Ni and Ti metal-powder of particle diameter≤50 μm loads in ball grinder according to atomic percent 88:6:6, and ratio of grinding media to material is 20:1, in the glove box of Ar atmosphere, inject 7ml toluene in ball grinder, and sealed cans; Load take out ball grinder from glove box after in ball mill, ball milling 30h under the rotating speed of 800r/min, obtains aluminium-based amorphous alloy powder;
(2) by Al, Co, Cr, Fe and Ni metal blocks of purity>=99.9% in molar ratio 0.6:1.4:1.0:1.0:1.0 be made into starting materials, in vacuum tightness 5.0 × 10
-4under Pa, using argon gas as shielding gas, and under agitation and under agitation melting 10min, obtain aluminium alloy; Aluminium alloy is cooled, obtains alloy pig; By the alloy pig upset obtained, repeat melting 4 times, obtain the master alloy ingot of AlCoCrFeNi high-entropy alloy; The master alloy ingot for preparing is loaded in vacuum metal powder by atomization stove, be 150 DEG C in superheating temperature, be atomized under atomization air pressure 9MPa condition, utilize vibrating screen classifier to obtain size distribution at the spherical high-entropy alloy powder of 20 ~ 100 μm;
(3) high-entropy alloy powder that al based amorphous alloy powder step (1) obtained and step (2) obtain loads in ball grinder according to the volume ratio of 1:1, and in the glove box of Ar atmosphere sealed cans, load take out ball grinder from glove box after in ball mill, do not add ball-milling medium, mix 15h under drum's speed of rotation is 700r/min after, obtain aluminium-based amorphous alloy/high-entropy alloy mixed powder;
(4) aluminium-based amorphous alloy step (3) obtained/high-entropy alloy mixed powder loads in YG15 sintered-carbide die, then discharge plasma sintering technique is utilized, be 150 DEG C/min at temperature rise rate, sintering temperature is 600 DEG C, pressure is sinter under 350MPa, insulation 9min, then drops to room temperature, obtains aluminium-based amorphous alloy/high-entropy alloy matrix material.
The sign that aluminium-based amorphous alloy/high-entropy alloy matrix material carries out prepared the present embodiment is as follows:
From the XRD figure of prepared matrix material, wherein Al
3ti, Al
3ni and Ni
3ti phase is Al base amorphous generation crystallization phenomenon and the Crystallization Phases produced in preparation process, and body-centered cubic BCC and face-centered cubic FCC phase are then mainly high-entropy alloy diffraction peak in matrix material.Known according to the SEM figure of matrix material, materials microstructure is obvious two-phase, Al base noncrystal substrate phase and high-entropy alloy particle, and wherein Al base amorphous almost densification completely, high-entropy alloy particle still keeps spheroidal, and two-phase interface combines good.In high power SEM figure, can find to there is obvious transition layer between the two phases, thickness is about 5 μm.The relative density utilizing Archimedes's drainage to record matrix material is 98.3%.Can obtain matrix material ultimate compression strength by quasistatic compression test reaches for 2972MPa, and comprehensive mechanical property is excellent.
Embodiment 4
(1) by purity >=99.5%, Al, Cu and Ti metal-powder of particle diameter≤50 μm is pressed atomic percent 65:16.5:18.5 and is loaded in ball grinder, and ratio of grinding media to material is 15:1, in the glove box of Ar atmosphere, inject 6ml toluene in ball grinder, and sealed cans; Load take out ball grinder from glove box after in ball mill, ball milling 25h under the rotating speed of 800r/min, obtains aluminium-based amorphous alloy powder;
(2) by Al, Co, Cr, Fe and Ni metal blocks of purity>=99.9% in molar ratio 1.0:1.0:1.0:1.0:1.0 be made into starting materials, in vacuum tightness 2.5 × 10
-3under Pa, using argon gas as shielding gas, and under agitation and under agitation melting 10min, obtain aluminium alloy; Aluminium alloy is cooled, obtains alloy pig; By the alloy pig upset obtained, repeat melting 4 times, obtain the master alloy ingot of AlCoCrFeNi high-entropy alloy; The master alloy ingot for preparing is loaded in vacuum metal powder by atomization stove, be 100 DEG C in superheating temperature, be atomized under atomization air pressure 5MPa condition, utilize vibrating screen classifier to obtain size distribution at the spherical high-entropy alloy powder of 20 ~ 100 μm;
(3) high-entropy alloy powder that al based amorphous alloy powder step (1) obtained and step (2) obtain loads in ball grinder according to the volume ratio of 1:3, and in the glove box of Ar atmosphere sealed cans, load take out ball grinder from glove box after in ball mill, do not add ball-milling medium, mix 15h under drum's speed of rotation is 600r/min after, obtain aluminium-based amorphous alloy/high-entropy alloy mixed powder;
(4) aluminium-based amorphous alloy step (3) obtained/high-entropy alloy mixed powder loads in YG15 sintered-carbide die, then discharge plasma sintering technique is utilized, be 100 DEG C/min at temperature rise rate, sintering temperature is 600 DEG C, pressure is sinter under 300MPa, insulation 5min, then drops to room temperature, obtains aluminium-based amorphous alloy/high-entropy alloy matrix material.
The sign that aluminium-based amorphous alloy/high-entropy alloy matrix material carries out prepared the present embodiment is as follows:
From the XRD figure of prepared matrix material, wherein Al
3ti, AlCu
2ti and Cu
3ti phase is Al base amorphous generation crystallization phenomenon and the Crystallization Phases produced in preparation process, and body-centered cubic BCC and face-centered cubic FCC phase are then mainly high-entropy alloy diffraction peak in matrix material.Known according to the SEM figure of matrix material, materials microstructure is obvious two-phase, Al base noncrystal substrate phase and high-entropy alloy particle, and wherein Al base amorphous almost densification completely, high-entropy alloy particle still keeps spheroidal, and two-phase interface combines good.In high power SEM figure, can find to there is obvious transition layer between the two phases, thickness is about 5 μm.The relative density utilizing Archimedes's drainage to record matrix material is 98.2%.Can obtain matrix material ultimate compression strength by quasistatic compression test reaches for 2991MPa, and comprehensive mechanical property is excellent.
The present invention includes but be not limited to above embodiment, every any equivalent replacement of carrying out under the principle of spirit of the present invention or local improvement, all will be considered as within protection scope of the present invention.
Claims (5)
1. aluminium-based amorphous alloy/high-entropy alloy matrix material, is characterized in that: in the volume of described matrix material for 100%, and its each moiety and volume fraction are: aluminium-based amorphous alloy 25 ~ 50%, high-entropy alloy 50 ~ 75%.
2. a kind of aluminium-based amorphous alloy/high-entropy alloy matrix material according to claim 1, is characterized in that: described aluminium-based amorphous alloy is Al-Cu-Ti, Al-Fe-Ti or Al-Ni-Ti prepared by mechanical alloying.
3. a kind of aluminium-based amorphous alloy/high-entropy alloy matrix material according to claim 1, is characterized in that: described high-entropy alloy is the AlCoCrFeNi utilizing Powder In Argon Atomization to prepare.
4. a preparation method for the aluminium-based amorphous alloy as described in any one of claims 1 to 3/high-entropy alloy matrix material, is characterized in that: described method steps is as follows;
Al, Cu and Ti metal-powder is pressed atomic percent 65:16.5:18.5 or Al by step 1., Fe and Ti metal-powder loads in ball grinder according to atomic percent 88:6:6 according to atomic percent 70:25:5 or Al, Ni and Ti metal-powder, and ratio of grinding media to material is 10 ~ 20:1; In ball grinder, 6 ~ 10ml toluene is injected in the glove box of Ar atmosphere, and sealed cans; Load take out ball grinder from glove box after in ball mill, rotational speed of ball-mill is 600 ~ 800r/min, and Ball-milling Time is 25 ~ 35h, obtains aluminium-based amorphous alloy powder;
Al, Co, Cr, Fe and Ni metal blocks 0.4 ~ 1.0:1.0 in molar ratio ~ 1.6:1.0:1.0:1.0 of purity>=99.9% is made into starting materials, in vacuum tightness 2.5 × 10 by step 2.
-3~ 5.0 × 10
-4under Pa, using argon gas as shielding gas, and under agitation melting 10 ~ 15min, obtain aluminium alloy; Aluminium alloy is cooled, obtains alloy pig; By the alloy pig upset obtained, repeat melting more than 4 times, obtain the master alloy ingot of AlCoCrFeNi high-entropy alloy; Master alloy ingot is loaded in vacuum metal powder by atomization stove, it is 100 ~ 200 DEG C in superheating temperature, be atomized under atomization air pressure 5 ~ 10MPa condition, and the powder particle particle diameter after atomization is screened, obtain the spherical high-entropy alloy powder that particle diameter is 20 ~ 100 μm;
The al based amorphous alloy powder that step 1 obtains by step 3. and the high-entropy alloy powder that step 2 obtains load in ball grinder, and in the glove box of Ar atmosphere sealed cans, load take out ball grinder from glove box after in ball mill, do not add ball-milling medium, mix 10 ~ 15h under drum's speed of rotation is 600 ~ 800r/min after, obtain aluminium-based amorphous alloy/high-entropy alloy mixed powder;
The aluminium-based amorphous alloy that step 3 obtains by step 4./high-entropy alloy mixed powder loads in sintered-carbide die, utilize discharge plasma sintering technique, be 100 ~ 150 DEG C/min at temperature rise rate, sintering temperature is 550 ~ 600 DEG C, pressure is sinter under 300 ~ 400MPa, drop to room temperature after insulation 5 ~ 10min, obtain described aluminium-based amorphous alloy/high-entropy alloy matrix material.
5. the preparation method of a kind of aluminium-based amorphous alloy/high-entropy alloy matrix material according to claim 4, is characterized in that: described Al, Cu, Fe, Ni, Ti metal-powder purity >=99.5%, particle diameter≤50 μm.
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