CN113122764A - Preparation method of CuCrFeCoNixTi high-entropy alloy thin strip - Google Patents
Preparation method of CuCrFeCoNixTi high-entropy alloy thin strip Download PDFInfo
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Abstract
The invention discloses a preparation method of a CuCrFeCoNixTi high-entropy alloy thin strip, which comprises the following steps: designing high-entropy alloy components according to atomic percentages of all elements, and calculating parameters such as mixing entropy and mixing enthalpy; weighing Cr, Co, Fe, Ti, Cu and Ni bulk materials according to different molar ratios, and cleaning; putting the raw materials into a vacuum arc melting furnace according to the melting point from top to bottom to be uniformly melted to obtain a high-entropy alloy with uniform components and a simple solid solution phase structure; and (3) preparing a high-entropy alloy thin strip by adopting a single-roller rapid solidification-strip casting method after remelting the high-entropy alloy ingot, wherein the thickness of the thin strip is 5-100 mu m. The alloy prepared by the invention has low cost, simple and easily realized process and short smelting period, and the obtained alloy thin strip has more uniform and fine structure and the characteristic of simple solid solution phase, can be applied to an alloy interlayer for diffusion connection of heterogeneous materials, and is a preparation method of a high-entropy alloy thin strip with great development potential.
Description
Technical Field
The invention belongs to the technical field of high-entropy alloy preparation, and particularly relates to a preparation method of a CuCrFeCoNixTi high-entropy alloy thin strip.
Background
With the urgent need of national defense science and technology and weaponry for high-strength high-reliability function and structure integrated heterogeneous composite materials, the connection technology of adding a middle-layer high-entropy alloy interlayer into heterogeneous alloy is more and more extensive, such as copper/CoCrFeMnNi/304 stainless steel, aluminum/Al0.5FeCoCrNi/Fe, connection of SiC/CoFeCrNiCu/SiC, and the like. Because the physical and chemical properties of the heterogeneous alloy connection are not matched, and intermetallic compounds generated in the heterogeneous alloy joint are hard and brittle intermediate phases, the interface mechanical properties of two heterogeneous materials are directly influenced. Therefore, a good metallurgical bonding joint is formed, which is the premise of improving the use performance of the connection of heterogeneous materials and is also the main research field of interface engineering in the connection of heterogeneous materials. At present, a common means for improving the bonding problem of the connection interface of the heterogeneous material is to add an alloy interlayer which realizes good metallurgical bonding with the two materials at the bonding surface of the heterogeneous material.
The high-entropy alloy has excellent characteristics which are not possessed by a plurality of traditional alloys, such as high hardness, high-temperature oxidation resistance, wear resistance, temperature resistance and corrosion resistance. Meanwhile, the high entropy effect of the high entropy alloy can inhibit the phase of a brittle intermetallic compound, promote the mixing of elements to form a simple body-centered cubic or face-centered cubic structure or even an amorphous state, and can be used as a transition layer for diffusion metallurgical connection of heterogeneous materials. Therefore, a CuCrFeCoNixTi high-entropy alloy transition layer is introduced into a heterogeneous alloy joint surface, the interface of a heterogeneous material can be alloyed through an alloy diffusion technology, and the generation of a brittle intermetallic compound phase of the interface is inhibited, so that the strength, hardness, high-temperature oxidation resistance, wear resistance, temperature resistance, corrosion resistance and other properties of the joint interface are greatly improved. However, at present, research on the high-entropy alloy as a transition layer for connecting heterogeneous materials is less, so that research on a high-entropy alloy thin strip with good performance is of great significance in providing experimental basis and technical support for introducing the high-entropy alloy thin strip into connection of the heterogeneous materials in the future and accelerating practical application of the high-entropy alloy.
Disclosure of Invention
The invention aims to provide a preparation method of a CuCrFeCoNixTi high-entropy alloy thin strip, which is applied to a transition layer connected with a heterogeneous material.
The technical scheme adopted by the invention is that the preparation method of the CuCrFeCoNixTi high-entropy alloy thin strip specifically comprises the following steps:
step 1, designing high-entropy alloy components
Designing a high-entropy alloy according to the atomic percentages of elements such as Cu, Cr, Co, Fe, Ni and Ti, and calculating the mixing entropy, the mixing enthalpy, the comprehensive atomic radius difference and the electronegativity of the high-entropy alloy;
step 2, weighing and cleaning materials
Weighing bulk materials of Cu, Cr, Co, Fe, Ni and Ti according to different molar ratios according to the design of the step 1, polishing to remove oxide skin and cleaning;
step 3, vacuum arc melting
Placing the raw materials cleaned in the step 2 in a vacuum arc melting furnace from top to bottom according to the melting point of Cr, Ti, Fe, Co, Ni and Cu, and uniformly melting to obtain the CuCrFeCoNixTi high-entropy alloy;
step 4, preparing the high-entropy alloy thin strip
And (3) remelting the CuCrFeCoNixTi high-entropy alloy ingot smelted in the step (3), and preparing the high-entropy alloy thin strip by using a single-roller rapid cooling and rapid solidification device.
The present invention is also characterized in that,
in the step 1, the elements are as follows according to atomic percentage: 5 to 35 percent of Ti, 5 to 25 percent of Fe, 5 to 20 percent of Ni, 5 to 25 percent of Cu, 5 to 35 percent of Cr and 5 to 25 percent of Co, wherein the sum of the atomic percentages of the above elements is 100 percent;
in the step 2: the copper is a commercially available copper sheet or copper block, and the purity is 99.99 percent; the chromium is a pure metal chromium block with the purity of 99.99 percent; the cobalt is pure metal cobalt block with the purity of 99.99 percent; the iron is commercially available reduced iron blocks, and the purity is 99.99 percent; the nickel is commercially available nickel particles or nickel blocks, the purity is 99.99 percent, and the titanium is pure metal titanium particles or titanium blocks, the purity is 99.99 percent; cleaning the raw materials;
in the step 3: will each beThe metal raw materials are sequentially placed in a sample groove of a water-cooling copper mold of a smelting furnace from top to bottom according to the sequence of high and low melting point Cr, Ti, Fe, Co, Ni and Cu, a sample chamber is vacuumized, and when the vacuum degree reaches 1 multiplied by 10-3And when Pa, filling high-purity argon into the sample chamber to normal pressure, carrying out protective smelting under the atmosphere, controlling the current to be 100-300 amperes in the smelting process, repeatedly smelting for 3-8 times, and taking out the sample after 5-30min of smelting is finished to obtain the alloy ingot.
Step 4, the specific steps for preparing the thin strip are as follows: and putting the well melted alloy sample into a quartz test tube with the diameter of 16mm multiplied by 150mm and a nozzle with the diameter of 0.5-2.0 mm at the bottom for remelting, vacuumizing to 1.0 multiplied by 10 < -2 > Pa-1.0 multiplied by 10 < -3 > Pa, reversely filling high-purity argon gas, continuously spraying the melted alloy to the surface of a copper roller rotating at high speed (the rotating speed of a roller is 5-20 m/s) through the nozzle under high pressure, and rapidly cooling and solidifying to form an alloy thin strip with the thickness of 5-100 mu m.
And 3, obtaining the CuCrFeCoNixTi series high-entropy alloy thin strip which is uniform in structure, fine in dendritic crystal, thin in thickness and simple in solid solution phase structure.
The method has the advantages that the high-entropy alloy thin strip prepared by the method is low in cost, simple in process, easy to realize and short in sintering period. The alloy thin strip has the characteristics of more uniform structure and fine dendritic crystals, has simple solid solution structure, can be applied to the design and application of an alloy interlayer in the connection of heterogeneous materials, and is a high-entropy alloy thin strip with great development potential.
Drawings
FIG. 1 is a process flow diagram of the manufacturing process of the present invention;
FIG. 2 is an SEM photograph of a CuCrFeCoNi1.5Ti high-entropy alloy prepared by the invention;
FIG. 3 shows the microhardness of the CuCrFeCoNixTi high-entropy alloy of the present invention;
FIG. 4 is an XRD spectrum of the CuCrFeCoNixTi series high-entropy alloy thin strip prepared by the invention;
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention provides a preparation method of a CuCrFeCoNixTi high-entropy alloy, the flow of which is shown in figure 1 and is specifically implemented according to the following steps:
step 1, designing high-entropy alloy components:
the metal elements forming the high-entropy alloy are Ti, Fe, Ni, Cu, Cr and Co. The elements are as follows by atomic percent: 5 to 35 percent of Ti, 5 to 25 percent of Fe, 5 to 20 percent of Ni, 5 to 25 percent of Cu, 5 to 35 percent of Cr and 5 to 25 percent of Co, wherein the sum of the atomic percentages of the above elements is 100 percent.
Step 2, weighing and cleaning materials:
weighing Cr, Co, Fe, Ti, Cu and Ni bulk materials according to different molar ratios, and cleaning surface impurities. The raw materials were placed in a beaker, and alcohol was poured into the beaker, stopping when completely immersed in alcohol. And then putting the beakers into a KQ-50DE type numerical control ultrasonic cleaner, respectively cleaning for 20 minutes, and respectively filling the beakers into sample bags after drying. And finally, accurately weighing the mixture by using an electronic balance with the precision of 0.001g according to the calculation result.
Step 3, vacuum arc melting:
placing the raw materials cleaned in the step 2 into a sample groove of a water-cooling copper mold of a smelting furnace from top to bottom according to the melting point of Cr, Ti, Fe, Co, Ni and Cu, vacuumizing the sample chamber, and when the vacuum degree reaches 1 multiplied by 10-3At Pa, a sample chamber was filled with high-purity argon gas to normal pressure, and melting was performed under protection in the atmosphere to improve the uniformity of the sample. Controlling the current to be 100-300 amperes in the smelting process, turning over the alloy block after the alloy is fully mixed, smelting again, repeatedly smelting for 3-8 times, and taking out the sample after 5-30min after the smelting is finished to obtain the high-entropy alloy ingot.
Step 4, preparing the high-entropy alloy thin strip:
and putting the well melted alloy sample into a quartz test tube with the diameter of 16mm multiplied by 150mm and a nozzle with the diameter of 0.5-2.0 mm at the bottom for remelting, vacuumizing to 1.0 multiplied by 10 < -2 > Pa-1.0 multiplied by 10 < -3 > Pa, reversely filling high-purity argon gas, continuously spraying the melted alloy to the surface of a copper roller rotating at high speed (the rotating speed of a roller is 5-20 m/s) through the nozzle under high pressure, and rapidly cooling and solidifying to form an alloy thin strip with the thickness of 5-100 mu m.
The CuCrFeCoNixTi series high-entropy alloy thin strip prepared by the method has the advantages that no intermetallic compound phase is generated in the structure, and the CuCrFeCoNixTi series high-entropy alloy thin strip is composed of a plurality of simple multiphase FCC, FCC + BCC or multiphase BCC solid solution structures, so that the CuCrFeCoNixTi series high-entropy alloy thin strip has important significance for improving the mechanical property of the interface of two heterogeneous materials in diffusion connection by adopting the high-entropy alloy thin strip.
Example 1
Step 1, designing high-entropy alloy components
According to atomic percentage: 30% of Ti, 25% of Fe, 5% of Ni, 10% of Cu, 5% of Cr and 25% of Co, wherein the sum of the atomic percentages of the elements is 100%, and the components are taken as the composition of the high-entropy alloy, and the high-entropy alloy components are converted into mass percentages from the atomic percentages;
step 2, weighing and cleaning materials
Cleaning up impurities on the surface of bulk materials of Cr, Co, Fe, Ti, Cu and Ni weighed according to different molar ratios in advance. The raw material was completely immersed in a beaker containing alcohol. And then putting the beakers into a KQ-50DE type numerical control ultrasonic cleaner, respectively cleaning for 20 minutes, and respectively filling the beakers into sample bags after drying. Finally, accurately weighing the mixture by using an electronic balance with the precision of 0.001g according to the calculation result;
step 3, vacuum arc melting
Placing the prepared raw materials into a sample groove of a water-cooled copper mold of a smelting furnace from top to bottom according to the melting point, vacuumizing a sample chamber until the vacuum degree reaches 1 multiplied by 10-3And when Pa, filling high-purity argon into the sample chamber to normal pressure, controlling the current to be 300 amperes during the smelting process, turning over the alloy block for smelting again after the alloy is fully mixed, repeatedly smelting for 5 times, wherein each time lasts for 2 minutes, and taking out the sample after 10 minutes of smelting is finished to obtain an alloy ingot.
Step 4, preparing the high-entropy alloy thin strip:
placing the well melted alloy sample into a quartz test tube with the diameter of 16mm multiplied by 150mm and a nozzle with the diameter of 1mm at the bottom for remelting, and vacuumizing to 1.0 multiplied by 10-3And (3) reversely filling high-purity argon after Pa, continuously spraying the molten alloy onto the surface of a copper roller rotating at high speed by a nozzle under high pressure (the rotating speed of the roller is 10m/s), and rapidly cooling and solidifying the molten alloy into an alloy thin strip with the thickness of 50 microns.
Example 2
Step 1, designing high-entropy alloy components
According to atomic percentage: 5% of Ti, 5% of Fe, 20% of Ni, 25% of Cu, 25% of Cr and 20% of Co, wherein the sum of the atomic percentages of the elements is 100%, and the components are selected as the composition of the high-entropy alloy, and the high-entropy alloy components are converted into mass percentages from the atomic percentages;
step 2, weighing and cleaning materials
Cleaning up impurities on the surface of bulk materials of Cr, Co, Fe, Ti, Cu and Ni weighed according to different molar ratios in advance. The raw material was completely immersed in a beaker containing alcohol. And then putting the beakers into a KQ-50DE type numerical control ultrasonic cleaner, respectively cleaning for 20 minutes, and respectively filling the beakers into sample bags after drying. Finally, accurately weighing the mixture by using an electronic balance with the precision of 0.001g according to the calculation result;
step 3, vacuum arc melting
Placing the prepared raw materials into a sample groove of a water-cooled copper mold of a smelting furnace from top to bottom according to the melting point, vacuumizing a sample chamber until the vacuum degree reaches 1 multiplied by 10-3And when Pa, filling high-purity argon into the sample chamber to normal pressure, controlling the current to be 250 amperes during the smelting process, turning over the alloy block to smelt again after the alloy is fully mixed, repeatedly smelting for 3 times, wherein each time lasts for 1.5 minutes, and taking out the sample after 20 minutes of smelting is finished to obtain an alloy ingot.
Step 4, preparing the high-entropy alloy thin strip:
placing the well melted alloy sample into a quartz test tube with the diameter of 16mm multiplied by 150mm and a nozzle with the diameter of 1.5mm at the bottom for remelting, and vacuumizing to 1.0 multiplied by 10-3And (3) reversely filling high-purity argon after Pa, continuously spraying the molten alloy onto the surface of a copper roller rotating at a high speed by a nozzle under high pressure (the rotating speed of the roller is 5m/s), and rapidly cooling and solidifying the molten alloy into an alloy thin strip with the thickness of 80 microns.
Example 3
Step 1, designing high-entropy alloy components
According to atomic percentage: 25% of Ti, 15% of Fe, 15% of Ni, 5% of Cu, 25% of Cr and 15% of Co, wherein the sum of the atomic percentages of the elements is 100%, and the components are selected as the composition of the high-entropy alloy, and the high-entropy alloy components are converted into mass percentages from the atomic percentages;
step 2, weighing and cleaning materials
Cleaning up impurities on the surface of bulk materials of Cr, Co, Fe, Ti, Cu and Ni weighed according to different molar ratios in advance. The raw material was completely immersed in a beaker containing alcohol. And then putting the beakers into a KQ-50DE type numerical control ultrasonic cleaner, respectively cleaning for 20 minutes, and respectively filling the beakers into sample bags after drying. Finally, accurately weighing the mixture by using an electronic balance with the precision of 0.001g according to the calculation result;
step 3, vacuum arc melting
Placing the prepared raw materials into a sample groove of a water-cooled copper mold of a smelting furnace from top to bottom according to the melting point, vacuumizing a sample chamber until the vacuum degree reaches 1 multiplied by 10-3And when Pa, filling high-purity argon into the sample chamber to normal pressure, controlling the current to be 250 amperes during the smelting process, turning over the alloy block to smelt again after the alloy is fully mixed, repeatedly smelting for 8 times, 1min each time, and taking out the sample after 25min after the smelting is finished to obtain an alloy ingot.
Step 4, preparing the high-entropy alloy thin strip:
placing the well melted alloy sample into a quartz test tube with the diameter of 16mm multiplied by 150mm and a nozzle with the diameter of 0.5mm at the bottom for remelting, and vacuumizing to 1 multiplied by 10-2And (3) reversely filling high-purity argon after Pa, continuously spraying the molten alloy onto the surface of a copper roller rotating at a high speed by a nozzle under high pressure (the rotating speed of the roller is 15m/s), and rapidly cooling and solidifying the molten alloy into an alloy thin strip with the thickness of 20 mu m.
Example 4
Step 1, designing high-entropy alloy components
According to atomic percentage: 14 percent of Ti, 16 percent of Fe, 20 percent of Ni, 10 percent of Cu, 35 percent of Cr and 5 percent of Co, wherein the sum of the atomic percentages of the elements is 100 percent, and the components are selected as the composition of the high-entropy alloy, and the atomic percentages of the components of the high-entropy alloy are converted into mass percentages;
step 2, weighing and cleaning materials
Cleaning up impurities on the surface of bulk materials of Cr, Co, Fe, Ti, Cu and Ni weighed according to different molar ratios in advance. The raw material was completely immersed in a beaker containing alcohol. And then putting the beakers into a KQ-50DE type numerical control ultrasonic cleaner, respectively cleaning for 20 minutes, and respectively filling the beakers into sample bags after drying. Finally, accurately weighing the mixture by using an electronic balance with the precision of 0.001g according to the calculation result;
step 3, vacuum arc melting
Placing the prepared raw materials into a sample groove of a water-cooled copper mold of a smelting furnace from top to bottom according to the melting point, vacuumizing a sample chamber until the vacuum degree reaches 1 multiplied by 10-3And when Pa, filling high-purity argon into the sample chamber to normal pressure, controlling the current to be 300 amperes during the smelting process, turning over the alloy block for smelting again after the alloy is fully mixed, repeatedly smelting for 3 times, wherein each time lasts for 2 minutes, and taking out the sample after 10 minutes of smelting is finished to obtain an alloy ingot.
Step 4, preparing the high-entropy alloy thin strip:
placing the well melted alloy sample into a quartz test tube with the diameter of 16mm multiplied by 150mm and a nozzle with the diameter of 2mm at the bottom for remelting, and vacuumizing to 5.0 multiplied by 10-2And (3) reversely filling high-purity argon after Pa, continuously spraying the molten alloy onto the surface of a copper roller rotating at a high speed by a nozzle under high pressure (the rotating speed of the roller is 5m/s), and rapidly cooling and solidifying the molten alloy into an alloy thin strip with the thickness of 100 mu m.
Example 5
Step 1, designing high-entropy alloy components
According to atomic percentage: the alloy comprises the following components, by mass, 20% of Ti, 25% of Fe, 10% of Ni, 10% of Cu, 10% of Cr and 25% of Co, wherein the sum of the atomic percentages of the above elements is 100%, and the components are selected as the composition of the high-entropy alloy;
step 2, weighing and cleaning materials
Cleaning up impurities on the surface of bulk materials of Cr, Co, Fe, Ti, Cu and Ni weighed according to different molar ratios in advance. The raw material was completely immersed in a beaker containing alcohol. And then putting the beakers into a KQ-50DE type numerical control ultrasonic cleaner, respectively cleaning for 20 minutes, and respectively filling the beakers into sample bags after drying. Finally, accurately weighing the mixture by using an electronic balance with the precision of 0.001g according to the calculation result;
step 3, vacuum arc melting
Placing the prepared raw materials into a sample groove of a water-cooled copper mold of a smelting furnace from top to bottom according to the melting point, vacuumizing a sample chamber until the vacuum degree reaches 1 multiplied by 10-3And when Pa, filling high-purity argon into the sample chamber to normal pressure, controlling the current to be 350 amperes in the smelting process, turning the alloy block for smelting again after the alloy is fully mixed, repeatedly smelting for 10 times, wherein each time lasts for 1.5 minutes, and taking out the sample after 35 minutes of smelting is finished.
Step 4, preparing the high-entropy alloy thin strip:
placing the well melted alloy sample into a quartz test tube with the diameter of 16mm multiplied by 150mm and a nozzle with the diameter of 0.5mm at the bottom for remelting, and vacuumizing to 5.0 multiplied by 10-2And (3) reversely filling high-purity argon after Pa, continuously spraying the molten alloy onto the surface of a copper roller rotating at a high speed by a nozzle under high pressure (the rotating speed of the roller is 25m/s), and rapidly cooling and solidifying the molten alloy into an alloy thin strip with the thickness of 50 microns.
Remelting the alloy ingot sample after the melting and matching, and when the vacuum degree reaches 1 multiplied by 10-2And introducing argon for protection after Pa, spraying the alloy liquid on a copper roller rotating at a high speed of 25m/s from a nozzle with the diameter of 0.5mm, and throwing to obtain the high-entropy alloy thin belt. Because the rotating speed of the roller is high, the prepared high-entropy alloy thin belt has no continuity, and an intermittent alloy thin belt can not be applied to the transition layer.
FIG. 2 is a scanning electron microscope photograph of a CuCrFeCoNi1.5Ti high-entropy alloy prepared by the invention, and the prepared CuCrFeCoNi1.5Ti high-entropy alloy has uniform structure; fig. 3 shows the hardness of a cucrfeconixtti-based high-entropy alloy, the comprehensive atomic radius difference of a cucrfeconixtti (x is 1, 1.5, 2) high-entropy alloy thin strip is much higher than that of a CuCrCoFeNi alloy, and the large atomic size difference increases lattice distortion in the alloy, so that the hardness of the alloy is improved. Fig. 4 is an XRD spectrum of the cucrfeconixtti (x ═ 0, 1, 1.5) high-entropy alloy thin strip prepared by the present invention; the high-entropy alloy CuCrFeCoNixTi is a simple multiphase BCC solid solution or FCC + BCC structure, and does not have a complex phase, because of the high mixed entropy effect of the alloy, the high mixed entropy increases the compatibility of each principal element, can obviously reduce the free energy of a system, and inhibits the occurrence of brittle intermetallic compounds, thereby promoting the mixing of elements to form a simple solid solution structure.
Claims (5)
1. A preparation method of a CuCrFeCoNixTi high-entropy alloy thin strip is characterized by comprising the following steps:
step 1, designing high-entropy alloy components
Designing a high-entropy alloy according to the atomic percentages of elements such as Cu, Cr, Co, Fe, Ni and Ti, and calculating the mixing entropy, the mixing enthalpy, the comprehensive atomic radius difference and the electronegativity of the high-entropy alloy;
step 2, weighing and cleaning materials
Weighing bulk materials of Cu, Cr, Co, Fe, Ni and Ti according to different molar ratios according to the design of the step 1, polishing to remove oxide skin and cleaning;
step 3, vacuum arc melting
Placing the raw materials cleaned in the step 2 in a vacuum arc melting furnace from top to bottom according to the melting point of Cr, Ti, Fe, Co, Ni and Cu, and uniformly melting to obtain the CuCrFeCoNixTi high-entropy alloy;
step 4, preparing the high-entropy alloy thin strip
And (3) remelting the CuCrFeCoNixTi high-entropy alloy ingot smelted in the step (3), and preparing the high-entropy alloy thin strip by using a single-roller rapid cooling and rapid solidification device.
2. The method for preparing the CuCrFeCoNixTi high-entropy alloy thin strip according to claim 1, wherein the elements in the step 1 are as follows by atomic percent: 5 to 35 percent of Ti, 5 to 25 percent of Fe, 5 to 20 percent of Ni, 5 to 25 percent of Cu, 5 to 35 percent of Cr and 5 to 25 percent of Co, wherein the sum of the atomic percentages of the above elements is 100 percent.
3. The method for preparing the CuCrFeCoNixTi high-entropy alloy ribbon as claimed in claim 1, wherein Cu in step 1 is a copper sheet or a copper block, and the purity is 99.99%; cr is a pure metal chromium block with the purity of 99.99 percent; co is pure metal cobalt block with the purity of 99.99 percent; fe is a commercial reduced iron block with the purity of 99.99 percent; ni is commercially available nickel particles or nickel blocks with the purity of 99.99 percent, and Ti is pure metal titanium particles or titanium blocks with the purity of 99.99 percent.
4. The method for preparing the CuCrFeCoNixTi high-entropy alloy thin strip according to claim 1, characterized in that the smelting in the step 3 is specifically as follows: sequentially placing the metal raw materials with high and low melting points of Cr, Ti, Fe, Co, Ni and Cu in a sample groove of a water-cooled copper mold of a smelting furnace from top to bottom, vacuumizing a sample chamber until the vacuum degree reaches 1 multiplied by 10-3And when Pa, filling high-purity argon into the sample chamber to normal pressure, carrying out protective smelting under the atmosphere, controlling the current to be 100-300 amperes in the smelting process, repeatedly smelting for 3-8 times, and taking out the sample after 5-30min of smelting is finished to obtain the alloy ingot.
5. The method for preparing the CuCrFeCoNixTi high-entropy alloy thin strip according to claim 1, characterized in that the specific steps for preparing the thin strip in the step 4 are as follows: placing the well melted alloy sample into a quartz test tube with the bottom provided with a nozzle with the diameter of 0.5-2.0 mm and the diameter of 16mm multiplied by 150mm for remelting, and vacuumizing to 1.0 multiplied by 10-2Pa～1.0×10-3And (3) reversely filling high-purity argon after Pa, continuously spraying the molten alloy onto the surface of a copper roller rotating at a high speed by a nozzle under high pressure, wherein the rotating speed of the roller is 5-20 m/s, and rapidly cooling and solidifying the molten alloy into an alloy thin strip, wherein the thickness of the thin strip is 5-100 mu m.
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Cited By (2)
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| CN114210964A (en) * | 2021-11-17 | 2022-03-22 | 东北大学 | Extremely-miscible 21-element high-entropy alloy nanoparticle and preparation method thereof |
| CN114737102A (en) * | 2022-04-18 | 2022-07-12 | 温州大学 | High-hardness sigma-phase high-entropy alloy coating and preparation method thereof |
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| CN114737102A (en) * | 2022-04-18 | 2022-07-12 | 温州大学 | High-hardness sigma-phase high-entropy alloy coating and preparation method thereof |
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