CN111748721B - High-entropy alloy/metal glass composite material and preparation method thereof - Google Patents
High-entropy alloy/metal glass composite material and preparation method thereof Download PDFInfo
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- CN111748721B CN111748721B CN202010650434.1A CN202010650434A CN111748721B CN 111748721 B CN111748721 B CN 111748721B CN 202010650434 A CN202010650434 A CN 202010650434A CN 111748721 B CN111748721 B CN 111748721B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/06—Vacuum casting, i.e. making use of vacuum to fill the mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C45/00—Amorphous alloys
- C22C45/10—Amorphous alloys with molybdenum, tungsten, niobium, tantalum, titanium, or zirconium or Hf as the major constituent
Abstract
The invention discloses a high-entropy alloy/metal glass composite material, which takes metal glass as a matrix, and high-entropy alloy is deposited on the surface of the matrix; the composite material takes the metal glass as a substrate, the high-entropy alloy as an external additive, and the Vickers hardness of the high-entropy alloy/metal glass composite material prepared by externally adding the high-entropy alloy powder on the metal glass substrate can reach 699HV, and the composite material has the characteristics of high hardness and excellent mechanical property. Meanwhile, in the process of relaxation of the metallic glass, due to the addition of the high-entropy alloy powder, dislocation among crystals in the composite material is reduced, and the defect of catastrophic fracture of the metallic glass under high pressure is greatly reduced. In addition, the high-entropy alloy/metal glass composite material provided by the invention is simple to manufacture and easy to operate, and the performance is obviously improved.
Description
Technical Field
The invention relates to the field of composite materials, in particular to a high-entropy alloy/metal glass composite material and a preparation method thereof.
Background
The high-entropy alloy system is mainly composed of five or more metal elements, and the content of each component is 5-35%. The high-entropy alloy contains a large amount of metal elements and has large element disorder degree, and the high-entropy effect promotes the mixing among the elements, so that the multi-element high-entropy alloy forms a simple crystalline phase, namely, a Body Centered Cubic (BCC) phase and a Face Centered Cubic (FCC) phase or even an amorphous phase are formed by the mixed arrangement of a plurality of elements, and the formation of brittle intermetallic compounds is inhibited. Due to the fact that a plurality of elements cause entropy increase in an alloy system, the high-entropy alloy has four unique effects of a high-entropy effect, a lattice distortion effect, a diarrhea diffusion effect and a 'cocktail' effect on thermodynamics. Therefore, the high-entropy alloy has the characteristics of high hardness, corrosion resistance and the like, so that the high-entropy alloy is more and more concerned and researched by people. In recent years, metal glass has attracted much attention because of its high hardness, high strength and strong corrosion resistance. As a member of amorphous materials, unlike conventional crystalline materials, metallic glasses are structurally characterized by a disordered long-range order and a short-range ordered arrangement of atoms. However, since metallic glass has poor plasticity under high pressure, catastrophic fracture may occur. Therefore, the metallic glass is difficult to be applied to practical materials on a large scale.
Therefore, in order to solve the problems of poor plasticity and unobvious hardness of the metal glass under the condition of high pressure, a novel high-entropy alloy/metal glass composite material is needed, the hardness of the material is further improved on the basis of ensuring the hardness of the raw material, the plasticity of the material is obviously improved, and the mechanical property of the material is improved.
Disclosure of Invention
In view of the above, the present invention provides a high-entropy alloy/metallic glass composite material and a preparation method thereof, which further improve the hardness of the material, simultaneously significantly improve the plasticity of the material, and improve the mechanical properties of the material on the basis of ensuring the hardness of the raw material.
The high-entropy alloy/metal glass composite material takes metal glass as a matrix, and the high-entropy alloy is deposited on the surface of the matrix;
furthermore, the high-entropy alloy has a chemical formula of TiAlFeCrCo0.8Ni2.1The chemical formula of the metallic glass is Zr59Ni21Al20；
Further, the composite material has a chemical formula of: (Zr)59Ni21Al20)x(TiAlFeCrCo0.8Ni2.1)yWherein x and y are natural numbers.
Further, x and y are 95 and 5.
According to the preparation method of the high-entropy alloy/metal glass composite material, the high-entropy alloy powder is adhered to the molten liquid of the metal glass and then rapidly cooled to form the high-entropy alloy/metal glass composite material;
further, a suction casting method is adopted to suck the molten liquid of the metal glass into a copper mould filled with the high-entropy alloy powder and then the molten liquid is rapidly cooled;
further, the method comprises the following steps:
a. placing the metal simple substance for forming the metal glass in an argon environment absorbed by sponge titanium to be smelted to prepare a master alloy ingot of the metal glass, wherein the smelting temperature is 2000-2050 ℃;
b. placing the metal simple substance for forming the high-entropy alloy in an argon environment absorbed by sponge titanium for smelting to prepare a master alloy ingot of the high-entropy alloy, and grinding the master alloy ingot into powder at 2000-2050 ℃;
c. smelting the mother alloy ingot in the step a into molten liquid, sucking the molten liquid into a copper mold filled with high-entropy alloy powder through pressure difference, and then rapidly cooling;
furthermore, in the steps a and b, the purity of the metal simple substance is not lower than 99.9%;
further, in step c, the rapid cooling rate was 120K/s.
The invention has the beneficial effects that: the high-entropy alloy/metal glass composite material disclosed by the invention takes metal glass as a substrate, high-entropy alloy as an external additive, and high-entropy alloy powder is externally added on the metal glass substrate, so that the Vickers hardness of the high-entropy alloy/metal glass composite material can reach 699HV, and the high-entropy alloy/metal glass composite material has the characteristics of high hardness and excellent mechanical property. Meanwhile, in the process of relaxation of the metallic glass, due to the addition of the high-entropy alloy powder, dislocation among crystals in the composite material is reduced, and the defect of catastrophic fracture of the metallic glass under high pressure is greatly reduced. In addition, the high-entropy alloy/metal glass composite material provided by the invention is simple to manufacture and easy to operate, and the performance is obviously improved.
Drawings
The invention is further described below with reference to the following figures and examples:
FIG. 1 shows (Zr) obtained in example one59Ni21Al20)95(TiAlFeCrCo0.8Ni2.1)5An X-ray diffraction pattern of the composite;
FIG. 2 shows (Zr) obtained in example one59Ni21Al20)95(TiAlFeCrCo0.8Ni2.1)5Scanning electron microscope images of the fracture surface morphology of the composite material;
FIG. 3 shows (Zr) obtained in example one59Ni21Al20)95(TiAlFeCrCo0.8Ni2.1)5Stress strain image of composite material and Zr59Ni21Al20Amorphous alloy reference picture;
FIG. 4 shows (Zr) obtained in example four59Ni21Al20)95(TiAlFeCrCo0.8Ni2.1)5A vickers hardness map of the composite;
FIG. 5 shows (Zr) obtained in example V59Ni21Al20)95(TiAlFeCrCo0.8Ni2.1)5DTA curve chart of the composite material at the temperature rise rate of 20K/min;
FIG. 6 is a schematic diagram of a copper mold structure for preparing a composite material.
Detailed Description
According to the high-entropy alloy/metal glass composite material, metal glass is used as a matrix, and the high-entropy alloy is deposited on the surface of the matrix; due to the addition of the high-entropy alloy powder, the dislocation between crystals in the composite material is reduced. The composite material changes the structure among crystals in the original metal glass, so that the obtained material can effectively solve the problems that the metal glass has poor plasticity and is easy to fracture catastrophically under high pressure, and simultaneously can improve the hardness of the metal glass.
In this embodiment, the high entropy alloy has a chemical formula of TiAlFeCrCo0.8Ni2.1The chemical formula of the metallic glass is Zr59Ni21Al20(ii) a The obtained material has more excellent mechanical properties.
In this embodiment, the chemical formula of the composition of the composite material is represented as: (Zr)59Ni21Al20)x(TiAlFeCrCo0.8Ni2.1)yWherein x and y are 95 and 5; during the relaxation of the metallic glass, the dislocation between crystals in the composite material is reduced due to the addition of the high-entropy alloy powder. Thereby, the defect that the metallic glass is catastrophically broken under high pressure is greatly reduced. The content of the metal glass and the high-entropy alloy powder can be controlled, so that the composite material can neutralize the metal glass and the high-entropy alloy powder to the maximum extent, and the obtained composite material has high hardness and improves the plastic deformation of the material.
According to the preparation method of the high-entropy alloy/metal glass composite material, the high-entropy alloy powder is adhered to the molten liquid of the metal glass and then rapidly cooled to form the high-entropy alloy/metal glass composite material;
in the embodiment, a suction casting method is adopted to suck molten liquid of metal glass into a copper mould filled with high-entropy alloy powder and then the molten liquid is rapidly cooled; the copper mold used has the following structure: the copper mould for preparing the composite material comprises a copper mould body 9, a cooling cavity arranged in the copper mould body 9 and a powder discharge cavity 5 communicated with the cooling cavity and used for sucking the powder material into the cooling cavity (7, 8); the independent discharging cavity is arranged in the copper die body 9 and used for placing powder materials to be added in the preparation process, and the powder materials enter the cooling cavities (7, 8) in a suction mode, so that the powder materials fully enter the melted metal solution, and a uniform and compact metal glass substrate with stable performance and regular shape is obtained. The problems of uneven internal structure of the material, low cooling speed and the like caused by the traditional mode of attaching the powder material in the copper die body 9 can be solved.
The copper mould cooling cavities (7, 8) have different inner diameters; products with different sizes can be prepared by using the same mould according to requirements, so that the production efficiency is improved, the utilization rate of the mould is improved, and the aim of multiple purposes of one mould is fulfilled;
the powder discharge cavity 5 is communicated with the vent groove 4 of the copper mold body 9 to suck the powder material in the powder discharge cavity 5 into the cooling cavity (7, 8); the powder discharge cavity 5 is communicated with the furnace body through the vent groove 4 of the die body, and alloy liquid and metal powder are sucked into cooling cavities (7, 8) in a copper die body 9 by utilizing the pressure difference generated between the furnace cavity and a vacuum pump;
the powder feeding cavity 5 is a closed cavity and is communicated with cooling cavities (7, 8) through a feeding channel 6; the powder material in the powder discharge cavity 5 enters the cooling cavities (7, 8) through the feed channel 6 under the action of suction force and fully enters the flowing smelting solution, so that the mixing uniformity of the powder material and the smelting solution is enhanced;
the powder discharge cavities 5 are two and are axially and symmetrically distributed along the cooling cavities (7, 8); the mixing uniformity of the powder material and the smelting solution is improved, so that the required powder can be ensured to fully enter the metal solution, the required composite material has a uniform structure, and the metal solution can be ensured to be rapidly solidified;
the powder discharging cavity 5 is communicated with the vent groove 4 in a turning way; powder materials in the powder discharge cavity 5 are prevented from escaping from the vent groove 4; the cooling cavities (7, 8) with different inner diameters are communicated with each other by the same axle center; the melt forms a plurality of sections of products with different sizes on one flowing line, the structure is simple and easy to operate, the products with different sizes can be prepared by using the same mould according to the requirements, the production efficiency is improved, the utilization rate of the mould is improved, and the aim of multiple purposes of one mould is fulfilled;
the inner diameter of the cooling cavity (7, 8) is reduced along the flowing direction of the molten liquid, and the molten liquid flows from the large inner diameter section to the small inner diameter section of the cooling cavity (7, 8); the melt flows from the large inner diameter section 7 to the small inner diameter section 8 of the cooling cavity (7, 8), so that the proper flow rate of the melt is ensured, the cooling speed of the melt is not influenced, and the high-precision product is obtained.
The length of the large inner diameter section 7 of the cooling cavity (7, 8) is smaller than that of the small inner diameter section 8; the inner diameter of the large inner diameter section of the cooling cavity (7, 8) is twice that of the small inner diameter section. The flow rate and the cooling speed of the molten liquid are not influenced, and the molten liquid in the cooling cavities (7, 8) with different inner diameter sections is formed.
In this embodiment, the method includes the following steps:
a. placing the metal simple substance for forming the metal glass in an argon environment absorbed by sponge titanium to be smelted to prepare a master alloy ingot of the metal glass, wherein the smelting temperature is 2000-2050 ℃; placing high-purity metal simple substance in an argon environment absorbed by sponge titanium according to the atomic ratio, placing the simple substance from top to bottom according to the melting point, smelting and mixing for at least 6 times, controlling the smelting temperature to be 2000-2050 ℃, and smelting time for at least 15s each time to prepare Zr59Ni21Al20Casting a mother alloy ingot;
b. placing the metal simple substance for forming the high-entropy alloy in an argon environment absorbed by sponge titanium for smelting to prepare a master alloy ingot of the high-entropy alloy, and grinding the master alloy ingot into powder at 2000-2050 ℃; smelting and mixing for at least 6 times, controlling the smelting temperature to be 2000-2050 ℃, and the smelting time of each time to be at least 15s to prepare TiAlFeCrCo0.8Ni2.1Casting a mother alloy ingot, and grinding the alloy ingot into powder; placing the powder in the copper mould with a charging cavity, screwing a screw on the bottom of the copper mould to prevent the powder from leaking out, and placing the copper mould in a non-consumable vacuum arc furnace.
c. Smelting the mother alloy ingot in the step a into molten liquid, sucking the molten liquid into a copper mold filled with high-entropy alloy powder through pressure difference, and then rapidly cooling; the molten liquid is quickly sucked into a copper mould filled with powder by utilizing the pressure difference between the inside and the outside of the cavity, so that the powder is bonded in a matrix, and then the high-entropy alloy/metal glass composite material with high strength and high plasticity can be prepared by quickly cooling.
In the embodiment, in the steps a and b, the purity of the metal simple substance is not lower than 99.9%; in step c, the rapid cooling rate is 120K/s.
Example one
The composition of the high-entropy alloy/metallic glass composite material prepared in the embodiment is represented by a chemical formula: (Zr)59Ni21Al20)95(TiAlFeCrCo0.8Ni2.1)5(ii) a The preparation method comprises the following steps:
a. placing high-purity metal simple substances of zirconium, nickel and aluminum in an argon environment absorbed by sponge titanium according to the atomic ratio, sequentially placing the materials from top to bottom according to the melting point, smelting and mixing for at least 6 times, controlling the smelting temperature to be 2000-2050 ℃, and smelting time for at least 15s each time to prepare Zr59Ni21Al20Casting a mother alloy ingot;
b. taking high-purity metal simple substances of titanium, aluminum, iron, chromium, cobalt and nickel according to the atomic ratio, placing the high-purity metal simple substances in an argon environment absorbed by sponge titanium, placing the high-purity metal simple substances from top to bottom according to the melting point in sequence, and smelting and mixing the high-purity metal simple substances until the high-purity metal simple substances are smelted and mixedLess 6 times, controlling the smelting temperature to 2000 ℃, and controlling the smelting time to be at least 15s each time to prepare TiAlFeCrCo0.8Ni2.1Casting a mother alloy ingot, and grinding the alloy ingot into powder;
c. TiAlFeCrCo0.8Ni2.1Placing the powder in a copper mould with a charging cavity, screwing a screw on the bottom of the copper mould to prevent the powder from leaking out, and then placing the copper mould in a non-consumable vacuum arc furnace;
d. re-smelting the mother alloy ingot prepared in the step a into molten liquid, and rapidly sucking the molten liquid into the TiAlFeCrCo charging chamber by utilizing the pressure difference between the inside and the outside of the chamber0.8Ni2.1In a special copper mould of powder, TiAlFeCrCo is made0.8Ni2.1The powder is bonded in a matrix and then rapidly cooled, and the high-entropy alloy/metal glass composite material with high strength and high plasticity can be prepared.
Columnar (Zr) 1.5mm in diameter prepared in this example59Ni21Al20)95(TiAlFeCrCo0.8Ni2.1)5The composite material has compression experimental data at a compression rate of 0.018m/s as shown in Table 1:
TABLE 1 (Zr)59Ni21Al20)95(TiAlFeCrCo0.8Ni2.1)5Mechanical parameters of the sample
Example two
The composition of the high-entropy alloy/metallic glass composite material prepared in the embodiment is represented by a chemical formula: (Zr)59Ni21Al20)95(TiAlFeCrCo0.8Ni2.1)5(ii) a The preparation method comprises the following steps:
a. placing high-purity metal simple substances of zirconium, nickel and aluminum in an argon environment absorbed by sponge titanium according to the atomic ratio, placing the materials from top to bottom according to the melting point in sequence, smelting and mixing for at least 6 times, controlling the smelting temperature to be 2000-2050 ℃, and controlling the smelting temperature to be every timeThe time of secondary smelting is at least 15s, and Zr is prepared59Ni21Al20Casting a mother alloy ingot;
b. placing high-purity metal simple substances of titanium, aluminum, iron, chromium, cobalt and nickel in an argon environment absorbed by sponge titanium according to the atomic ratio, sequentially placing the high-purity metal simple substances from top to bottom according to the melting point, smelting and mixing for at least 6 times, controlling the smelting temperature to be 2050 ℃ and the smelting time of each time to be at least 15s to prepare TiAlFeCrCo0.8Ni2.1Casting a mother alloy ingot, and grinding the alloy ingot into powder;
c. TiAlFeCrCo0.8Ni2.1Placing the powder in a copper mould with a charging cavity, screwing a screw on the bottom of the copper mould to prevent the powder from leaking out, and then placing the copper mould in a non-consumable vacuum arc furnace;
d. re-smelting the mother alloy ingot prepared in the step a into molten liquid, and rapidly sucking the molten liquid into the TiAlFeCrCo charging chamber by utilizing the pressure difference between the inside and the outside of the chamber0.8Ni2.1In a special copper mould of powder, TiAlFeCrCo is made0.8Ni2.1The powder is bonded in a matrix and then rapidly cooled, and the high-entropy alloy/metal glass composite material with high strength and high plasticity can be prepared.
Columnar (Zr) having a diameter of 2mm prepared in this example59Ni21Al20)95(TiAlFeCrCo0.8Ni2.1)5The composite material compression test data at a compression rate of 0.024m/s is shown in Table 2:
TABLE 2 (Zr)59Ni21Al20)95(TiAlFeCrCo0.8Ni2.1)5Mechanical parameters of the sample
EXAMPLE III
The composition of the high-entropy alloy/metallic glass composite material prepared in the embodiment is represented by a chemical formula: (Zr)59Ni21Al20)95(TiAlFeCrCo0.8Ni2.1)5(ii) a The preparation method comprises the following steps:
a. placing high-purity metal simple substances of zirconium, nickel and aluminum in an argon environment absorbed by sponge titanium according to the atomic ratio, sequentially placing the materials from top to bottom according to the melting point, smelting and mixing for at least 6 times, controlling the smelting temperature to be 2000-2050 ℃, and smelting time for at least 15s each time to prepare Zr59Ni21Al20Casting a mother alloy ingot;
b. placing high-purity metal simple substances of titanium, aluminum, iron, chromium, cobalt and nickel in an argon environment absorbed by sponge titanium according to the atomic ratio, sequentially placing the high-purity metal simple substances from top to bottom according to the melting point, carrying out smelting and mixing for at least 6 times, controlling the smelting temperature to be 2010 ℃ and the smelting time to be at least 15s each time, and preparing the TiAlFeCrCo0.8Ni2.1Casting a mother alloy ingot, and grinding the alloy ingot into powder;
c. TiAlFeCrCo0.8Ni2.1Placing the powder in a copper mould with a charging cavity, screwing a screw on the bottom of the copper mould to prevent the powder from leaking out, and then placing the copper mould in a non-consumable vacuum arc furnace;
d. re-smelting the mother alloy ingot prepared in the step a into molten liquid, and rapidly sucking the molten liquid into the TiAlFeCrCo charging chamber by utilizing the pressure difference between the inside and the outside of the chamber0.8Ni2.1The powder is in a copper die with the diameter of 3mm, so that TiAlFeCrCo0.8Ni2.1The powder is bonded in a matrix and then rapidly cooled, and the high-entropy alloy/metal glass composite material with high strength and high plasticity can be prepared.
Columnar (Zr) having a diameter of 3mm prepared in this example59Ni21Al20)95(TiAlFeCrCo0.8Ni2.1)5The data of the compression experiment of the composite material at a compression rate of 0.036m/s are shown in Table 3:
TABLE 3 (Zr)59Ni21Al20)95(TiAlFeCrCo0.8Ni2.1)5Mechanical parameters of the sample
Example four
The composition of the high-entropy alloy/metallic glass composite material prepared in the embodiment is represented by a chemical formula: (Zr)59Ni21Al20)95(TiAlFeCrCo0.8Ni2.1)5(ii) a The preparation method comprises the following steps:
a. placing high-purity metal simple substances of zirconium, nickel and aluminum in an argon environment absorbed by sponge titanium according to the atomic ratio, sequentially placing the materials from top to bottom according to the melting point, smelting and mixing for at least 6 times, controlling the smelting temperature to be 2000-2050 ℃, and smelting time for at least 15s each time to prepare Zr59Ni21Al20Casting a mother alloy ingot;
b. placing high-purity metal simple substances of titanium, aluminum, iron, chromium, cobalt and nickel in an argon environment absorbed by sponge titanium according to the atomic ratio, sequentially placing the high-purity metal simple substances from top to bottom according to the melting point, smelting and mixing for at least 6 times, controlling the smelting temperature to be 2030 ℃ and the smelting time of each time to be at least 15s to prepare TiAlFeCrCo0.8Ni2.1Casting a mother alloy ingot, and grinding the alloy ingot into powder;
c. TiAlFeCrCo0.8Ni2.1Placing the powder in a copper mould with a charging cavity, screwing a screw on the bottom of the copper mould to prevent the powder from leaking out, and then placing the copper mould in a non-consumable vacuum arc furnace;
d. re-smelting the mother alloy ingot prepared in the step a into molten liquid, and rapidly sucking the molten liquid into the TiAlFeCrCo charging chamber by utilizing the pressure difference between the inside and the outside of the chamber0.8Ni2.1In a copper mold of powder, TiAlFeCrCo0.8Ni2.1The powder is bonded in a matrix and then rapidly cooled, and the high-entropy alloy/metal glass composite material with high strength and high plasticity can be prepared.
Columnar form (Zr) obtained in this example59Ni21Al20)95(TiAlFeCrCo0.8Ni2.1)5The vickers hardness of the composite material at a test force of 500N is shown in fig. 4.
EXAMPLE five
The composition of the high-entropy alloy/metallic glass composite material prepared in the embodiment is represented by a chemical formula: (Zr)59Ni21Al20)95(TiAlFeCrCo0.8Ni2.1)5(ii) a The preparation method comprises the following steps:
a. placing high-purity metal simple substances of zirconium, nickel and aluminum in an argon environment absorbed by sponge titanium according to the atomic ratio, sequentially placing the materials from top to bottom according to the melting point, smelting and mixing for at least 6 times, controlling the smelting temperature to be 2000-2050 ℃, and smelting time for at least 15s each time to prepare Zr59Ni21Al20Casting a mother alloy ingot;
b. placing high-purity metal simple substances of titanium, aluminum, iron, chromium, cobalt and nickel in an argon environment absorbed by sponge titanium according to the atomic ratio, sequentially placing the high-purity metal simple substances from top to bottom according to the melting point, smelting and mixing for at least 6 times, controlling the smelting temperature to be 2040 ℃ and the smelting time of each time to be at least 15s to prepare TiAlFeCrCo0.8Ni2.1Casting a mother alloy ingot, and grinding the alloy ingot into powder;
c. TiAlFeCrCo0.8Ni2.1Placing the powder in a copper mould with a charging cavity, screwing a screw on the bottom of the copper mould to prevent the powder from leaking out, and then placing the copper mould in a non-consumable vacuum arc furnace;
d. re-smelting the mother alloy ingot prepared in the step a into molten liquid, and rapidly sucking the molten liquid into the TiAlFeCrCo charging chamber by utilizing the pressure difference between the inside and the outside of the chamber0.8Ni2.1In a copper mold of powder, TiAlFeCrCo0.8Ni2.1The powder is bonded in a matrix and then rapidly cooled, and the high-entropy alloy/metal glass composite material with high strength and high plasticity can be prepared.
Columnar form (Zr) obtained in this example59Ni21Al20)95(TiAlFeCrCo0.8Ni2.1)5The DTA curve of the composite material at a temperature rise rate of 20K/min is shown in FIG. 5.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (6)
1. A high-entropy alloy/metallic glass composite material is characterized in that: the composite material takes metal glass as a matrix, and high-entropy alloy is deposited on the surface of the matrix, and the composite material is formed by adhering high-entropy alloy powder to molten liquid of the metal glass and then rapidly cooling; the high-entropy alloy has a chemical formula of TiAlFeCrCo0.8Ni2.1The chemical formula of the metallic glass is Zr59Ni21Al20(ii) a The composite material has a chemical formula as follows: (Zr)59Ni21Al20)x(TiAlFeCrCo0.8Ni2.1)yWherein x =95 and y = 5.
2. A method of preparing a high entropy alloy/metallic glass composite material according to claim 1, characterized in that: the high-entropy alloy powder is adhered to the molten liquid of the metal glass and then rapidly cooled to form the high-entropy alloy/metal glass composite material.
3. A method of preparing a high entropy alloy/metallic glass composite material according to claim 2, characterized in that: molten liquid of the metallic glass is sucked into a copper mould filled with high-entropy alloy powder by adopting a suction casting method and then is rapidly cooled.
4. A method of preparing a high entropy alloy/metallic glass composite material according to claim 3, characterized in that: the method comprises the following steps:
a. placing the metal simple substance for forming the metal glass in an argon environment absorbed by sponge titanium to be smelted to prepare a master alloy ingot of the metal glass, wherein the smelting temperature is 2000-2050 ℃;
b. placing the metal simple substance for forming the high-entropy alloy in an argon environment absorbed by sponge titanium for smelting to prepare a master alloy ingot of the high-entropy alloy, and grinding the master alloy ingot into powder at 2000-2050 ℃;
c. and c, smelting the mother alloy ingot in the step a into molten liquid, sucking the molten liquid into a copper mold filled with high-entropy alloy powder through pressure difference, and then rapidly cooling.
5. A method for preparing a high-entropy alloy/metallic glass composite material according to claim 4, characterized in that: in the steps a and b, the purity of the metal simple substance is not lower than 99.9%.
6. A method of preparing a high entropy alloy/metallic glass composite material according to claim 5, characterized in that: in step c, the rapid cooling rate is 120K/s.
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