Au-based amorphous alloy and preparation method thereof

Abstract

The invention discloses an Au-based amorphous alloy and a preparation method thereof, and belongs to the technical field of amorphous alloy materials. The method is used for solving the technical problem that in the prior art, a gold-based amorphous alloy prepared from ternary metal is prone to component segregation, so that the mechanical property of the prepared amorphous alloy is poor. A preparation method of an Au-based amorphous alloy comprises the following steps that S1, Au, Al, V and silicone oil-mixed metal powder are added into an induction melting furnace to be smelted, the induction melting furnace is vacuumized, then high-purity argon is introduced, smelting is conducted, and a high-temperature metal melt is obtained; high-temperature metal melt is subjected to spray casting, cutting, melt-spinning and cooling, and a master alloy material is prepared; and S2, the master alloy material is added into a corrosion solvent to be soaked, washed and dried to constant weight, and the prepared Au-based amorphous alloy is obtained. The Au-based amorphous alloy prepared by the method has the advantages of high mechanical strength, high purity and good thermal stability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of amorphous alloy materials, in particular to an Au-based amorphous alloy and a preparation method thereof. BACKGROUND

[0002] Amorphous alloy is a new type of amorphous metal glass material with excellent mechanical, physical and chemical properties of general metals and glasses. Compared with traditional crystalline metals, amorphous alloy has excellent mechanical properties, wear resistance and corrosion resistance. Among them, Au-based amorphous alloy is a kind of alloy material with amorphous structure prepared by taking gold as the main component through rapid cooling or physical deposition. Common Au-based amorphous alloy preparation processes include melt quenching method (melting gold-based alloy is sprayed onto the surface of a high-speed rotating cooling roller through a nozzle, and rapid solidification is realized by the high thermal conductivity of the cooling roller to form amorphous thin strips), deep supercooling technology (metal liquid is directly poured into a metal mold to realize rapid cooling by the thermal conductivity of the copper mold), melt water quenching method (melting gold-based alloy is mixed with molten glass, heated and melted, and the alloy liquid is sprayed into water for rapid cooling to form amorphous alloy rods), etc.

[0003] Patent application CN108315673A discloses a gold-based amorphous alloy without non-metallic elements and a preparation method thereof. Single crystal silicon is used as a substrate, and Au element, Al element and V element are used as target materials. The target materials and the substrate are prepared into a thin film sample with composition gradient by a multi-target magnetron sputtering method. The present application dopes element V on the basis of Au-Al binary system to obtain a gold-based amorphous alloy; and introduces element Cr in the above-mentioned ternary system to obtain a four-element gold-based amorphous alloy with a larger amorphous region. However, the melting points of Au element, Al element and V element are greatly different, which easily leads to composition segregation, and thus the mechanical properties and thermal stability of the prepared amorphous alloy are reduced.

[0004] In view of the above technical defects, a solution is proposed. SUMMARY

[0005] The present application aims to provide an Au-based amorphous alloy and a preparation method thereof, which can solve the technical problem that the gold-based amorphous alloy prepared by ternary metal elements is prone to composition segregation, and thus the mechanical properties and thermal stability of the prepared amorphous alloy are poor.

[0006] The object of the present application can be achieved by the following technical solutions: A preparation method of an Au-based amorphous alloy, comprising the following steps: S1, according to the percentage by weight, 40-60% of Au, 20-25% of Al, 10-15% of V and the rest of the silicon oil-mixed metal powder is added to the induction melting furnace, the induction melting furnace is vacuumized, then high-purity argon is introduced, and then melted to obtain a high-temperature metal melt; the high-temperature metal melt is sprayed, cut, added to a tape casting machine, and cooled to prepare a master alloy material; S2, the master alloy material is soaked in the etching solvent, washed, and dried to a constant weight, which is the Au-based amorphous alloy prepared.

[0007] Further, in step S1, the preparation method of the silicon oil-mixed metal powder system comprises the following steps: B1, according to the weight parts, 5-10 parts of tungsten, 5-10 parts of molybdenum, 1-5 parts of zirconium, 1-5 parts of boron and 1-5 parts of silicon are added to a vacuum ball mill for ball milling to obtain a mixed metal powder; the mixed metal powder is sintered to obtain a sintered mixed metal powder; B2, the sintered mixed metal powder and the silicon oil are blended to obtain a mixed system; the mixed system is ultrasonically dispersed to obtain a silicon oil-mixed metal powder system.

[0008] Further, in step B1, the ball milling speed is 300-350 r / min, and the ball milling time is 3-6 h; the sintering temperature is 1500-2000℃, and the sintering pressure is 25-30 MPa; in step B2, the amount ratio of the sintered mixed metal powder to the silicon oil is 10-20 g:20-30 mL; the ultrasonic power of the mixed system is 20-30 kW, and the ultrasonic time is 10-15 min.

[0009] The Au, Al, V and the doped metal elements in the silicon oil-mixed metal powder are high-temperature melted in the induction melting furnace to obtain a high-temperature metal melt. The high-temperature metal melt is sprayed into a mold and rapidly cooled, thereby maintaining the atomic arrangement mode inside the metal melt to a certain extent, and then the master alloy material is prepared after cutting, tape casting and other post-process treatments.

[0010] Further, in step S1, the air pressure of the induction melting furnace is set to 0.05-0.08 MPa; the melting temperature of the induction melting furnace is 2100-2200℃, the melting frequency is 3-5 times, and the melting time of each time is 5-10 min.

[0011] Further, in step S1, the cabin of the tape casting machine is vacuumized to 10 -4 ~10 -3 Pa, and then inert gas is introduced to adjust the cabin air pressure to 0.02-0.04 MPa.

[0012] Further, in step S2, the preparation method of the etching solvent is: acrylonitrile, 30-50%wt of hydroxylamine hydrochloride solution and sodium butoxide are blended, and reacted at 55-65 DEG C for 22-24h to obtain an intermediate; the intermediate and ethylene glycol are blended to obtain a deep eutectic solvent; the deep eutectic solvent, nano-copper and 10-15%wt of nitric acid solution are blended, and blended and reacted at 55-65 DEG C for 30-60min to obtain the prepared corrosion solution; The hydroxylamine hydrochloride releases free hydroxylamine molecules, and the nucleophilic nitrogen atom can attack the carbon atom of the cyano group. The hydroxylamine hydrochloride solution and acrylonitrile are reacted, and sodium butoxide is used as a catalyst. The prepared intermediate can be used as a hydrogen bond acceptor, and ethylene glycol is used as a hydrogen bond donor. The two are blended to prepare a deep eutectic solvent. Nano-copper and nitric acid solution are reacted to obtain a copper salt solution. The prepared deep eutectic solvent is used as a solubilizing solvent to form a corrosion solution.

[0013] B2, the master alloy material is added to the corrosion solvent for soaking, washing and drying to constant weight to obtain the prepared Au-based amorphous alloy.

[0014] Further, in step B1, the amount ratio of acrylonitrile, hydroxylamine hydrochloride solution and sodium butoxide is 10-20mL:20-25mL:0.3-0.5mL, and the volume ratio of the intermediate and ethylene glycol is 1:1-2. The weight ratio of the deep eutectic solvent, nano-copper and nitric acid solution is 20-30:1-3:5-10. In step B2, the mass ratio of the master alloy material and the corrosion solvent is 1-3:5-10. The soaking temperature is 35-45 DEG C, and the soaking time is 3-6h.

[0015] As another aspect of the present application, the Au-based amorphous alloy is prepared by the method.

[0016] The present application has the following advantages: 1. The refractory metal elements W (tungsten), Mo (molybdenum), Zr (zirconium) and auxiliary elements B (boron), Si (silicon) are mixed in proportion, crushed and ball milled to prepare a mixed metal powder; the mixed metal powder and silicone oil are blended and ultrasonically dispersed to obtain a silicone oil-mixed metal powder system that is not miscible. The Au, Al and V ternary system can be used to prepare an amorphous alloy. The mixed metal powder is doped in the prepared amorphous alloy, and the refractory metal elements W, Mo, Zr, etc. can increase the strength, hardness and corrosion resistance of the prepared mixed metal powder. In addition, the high-temperature metal melt can form a high-entropy alloy, so that the prepared high-temperature metal melt has high strength and high hardness. The silicone oil can form a protective film on the metal surface during the smelting process, which helps to prevent metal oxidation and adsorb impurities on the surface of the metal melt, and helps to prepare a high-purity master alloy material.

[0017] 2. Hydroxylamine hydrochloride reacts with ethylene glycol to form hydrogen bond acceptors. The eutectic solvent prepared by blending ethylene glycol and the hydrogen bond acceptors accelerates the corrosion of nano-copper, thus forming a green and environmentally friendly corrosion solution. The surface of the master alloy material is etched using this solution, forming a porous structure and increasing its surface area. Furthermore, the aforementioned eutectic solvent forms a dense passivation film on the surface of the prepared master alloy material, preventing excessive corrosion of the Au-based amorphous alloy surface. The Au-based amorphous alloy prepared by this invention exhibits a long-range disordered and short-range ordered atomic arrangement, eliminating structural defects such as grain boundaries and dislocations, and avoiding component segregation and second-phase precipitation, thereby giving the prepared Au-based amorphous alloy high overall corrosion resistance. However, surface treatment with a corrosion solvent to obtain a slightly corroded Au-based amorphous alloy can improve the catalytic activity, reactivity, and self-friction properties of the synthesized Au-based amorphous alloy. Detailed Implementation

[0018] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] The silicone oil used in Examples 1-3 of this invention is dimethyl silicone oil, with product number ZH-4047, purchased from AVIC New Materials Co., Ltd., CAS number 70131-67-8, and boiling point 182℃; the nano copper used in Examples 7-9 of this invention is purchased from Nangong Kezhou Metal Materials Co., Ltd., CAS number 7440-4-8.

[0020] Example 1 This embodiment provides a method for preparing a silicone oil-mixed metal powder system for preparing Au-based amorphous alloys, including the following steps: B1. By weight, 5 parts tungsten, 5 parts molybdenum, 1 part zirconium, 1 part boron, and 1 part silicon are added to a vacuum ball mill. The ball mill jar is always filled with an argon atmosphere. The ball milling speed is 300 r / min, and the milling time is 3 h to obtain a mixed metal powder. The mixed metal powder is then added to a spark plasma sintering furnace for sintering at a temperature of 1500℃, a sintering pressure of 25 MPa, and a holding time of 10 min to obtain the prepared mixed metal powder.

[0021] B2, 10 g of the mixed metal powder after sintering and 20 mL of silicone oil were added into a beaker to obtain a mixed system. The beaker was transferred to a heating table, and the beaker was heated to 150 DEG C; an ultrasonic tool head in an ultrasonic mold was placed above the mixed system to perform pulsed ultrasonic dispersion, the distance between the ultrasonic tool head and the mixed system was 5 mm, the ultrasonic power was 20 kW, and the ultrasonic time was 10 min, to obtain a silicone oil-mixed metal powder system.

[0022] Example 2 The embodiment provides a preparation method of a silicone oil-mixed metal powder system for preparing an Au-based amorphous alloy, and the method comprises the following steps: B1, 8 parts of tungsten, 8 parts of molybdenum, 3 parts of zirconium, 3 parts of boron and 3 parts of silicon were added into a vacuum ball mill, the ball mill tank was always filled with an argon atmosphere, the ball milling speed was 320 r / min, and the ball milling time was 5 h to obtain a mixed metal powder. The mixed metal powder was added into a spark plasma sintering furnace, the temperature of the sintering furnace was 1800 DEG C, the sintering pressure was 28 MPa, and the holding time was 12 min, and the mixed metal powder was obtained.

[0023] B2, 15 g of the mixed metal powder after sintering and 22 mL of silicone oil were added into a beaker to obtain a mixed system. The beaker was transferred to a heating table, and the beaker was heated to 160 DEG C; an ultrasonic tool head in an ultrasonic mold was placed above the mixed system to perform pulsed ultrasonic dispersion, the distance between the ultrasonic tool head and the mixed system was 7 mm, the ultrasonic power was 23 kW, and the ultrasonic time was 12 min, to obtain a silicone oil-mixed metal powder system.

[0024] Example 3 The embodiment provides a preparation method of a silicone oil-mixed metal powder system for preparing an Au-based amorphous alloy, and the method comprises the following steps: B1, 10 parts of tungsten, 10 parts of molybdenum, 5 parts of zirconium, 5 parts of boron and 5 parts of silicon were added into a vacuum ball mill, the ball mill tank was always filled with an argon atmosphere, the ball milling speed was 350 r / min, and the ball milling time was 6 h to obtain a mixed metal powder. The mixed metal powder was added into a spark plasma sintering furnace, the temperature of the sintering furnace was 2000 DEG C, the sintering pressure was 30 MPa, and the holding time was 15 min, to obtain the mixed metal powder after sintering.

[0025] B2, 20 g of sintered mixed metal powder and 30 mL of silicone oil were added into a beaker to obtain a mixed system. The beaker was transferred to a heating table, and the beaker was heated to 170°C; an ultrasonic tool head in an ultrasonic mold was placed above the mixed system for pulsed ultrasonic dispersion, the distance between the ultrasonic tool head and the mixed system was 10 mm, the ultrasonic power was 30 kW, and the ultrasonic time was 15 min, to obtain a silicone oil-mixed metal powder system.

[0026] Example 4 The embodiment provides a preparation method of a master alloy material for an Au-based amorphous alloy, and the method comprises the following steps: A1, according to the weight percentage, 40% of Au, 20% of Al, 10% of V and the rest of the silicone oil-mixed metal powder prepared in example 1 were added into a bottom-sealed quartz tube, and then the quartz tube was placed in an induction melting furnace. The cabin of the induction melting furnace was vacuumed to 10 -4 Pa, high-purity argon was introduced into the backward induction melting furnace until the gas pressure of the induction melting furnace was set to 0.05 MPa; the induction melting furnace was melted at 2100°C for 3 times, and each melting time was 5 min, to prepare a high-temperature metal melt.

[0027] A2, the high-temperature metal melt was sprayed into a mold with a size of 4 mm*1100 mm, and then the composite alloy rod was taken out after cooling to obtain a block with a size of 4 mm*15 mm. The block was added into a vacuum spinning machine to spin, the cabin was vacuumed to 10 -3 Pa, and then the cabin was filled with inert gas argon to adjust the cabin gas pressure to 0.02 MPa, and then the composite alloy rod was taken out after cooling, to obtain an amorphous strip, which is the prepared master alloy material.

[0028] Example 5 The embodiment provides a preparation method of a master alloy material for an Au-based amorphous alloy, and the method comprises the following steps: A1, according to the weight percentage, 40% of Au, 20% of Al, 10% of V and the rest of the silicone oil-mixed metal powder prepared in example 1 were added into a bottom-sealed quartz tube, and then the quartz tube was placed in an induction melting furnace. The cabin of the induction melting furnace was vacuumed to 10 -4 Pa, high-purity argon was introduced into the backward induction melting furnace until the gas pressure of the induction melting furnace was set to 0.05 MPa; the induction melting furnace was melted at 2100°C for 3 times, and each melting time was 5 min, to prepare a high-temperature metal melt.

[0029] A2, the high-temperature metal melt is sprayed into a mold with a size of 4mmxl100mm, and the composite alloy rod is obtained after cooling and taking out; the composite alloy rod is cut by a precision cutting machine to obtain a block with a size of 4mmxl5mm. The block is added to a vacuum tape caster, and the chamber of the vacuum tape caster is vacuumed to 10 -3 Pa, and then the inert gas argon is filled into the chamber to adjust the chamber pressure to 0.04MPa. After cooling and taking out, the amorphous strip obtained is the prepared master alloy material.

[0030] Example 6 The embodiment provides a preparation method of a master alloy material for an Au-based amorphous alloy, and the method comprises the following steps: A1, according to the weight percentage, 60% of Au, 25% of Al, 15% of V and the rest of the silicon oil-metal mixed powder prepared in example 3 are added into a bottom-sealed quartz tube, and then the quartz tube is placed in an induction melting furnace. The chamber of the induction melting furnace is vacuumed to 10 -4 Pa, and then high-purity argon is introduced into the induction melting furnace until the pressure of the induction melting furnace is set to 0.08MPa; the induction melting furnace is melted at 2200℃ for 5 times, and each time the melting time is 10min, and a high-temperature metal melt is prepared.

[0031] A2, the high-temperature metal melt is sprayed into a mold with a size of 4mmxl100mm, and the composite alloy rod is obtained after cooling and taking out; the composite alloy rod is cut by a precision cutting machine to obtain a block with a size of 4mmxl5mm. The block is added to a vacuum tape caster, and the chamber of the vacuum tape caster is vacuumed to 10 -4 Pa, and then the inert gas argon is filled into the chamber to adjust the chamber pressure to 0.04MPa. After cooling and taking out, the amorphous strip obtained is the prepared master alloy material.

[0032] Example 7 The embodiment provides a preparation method of an Au-based amorphous alloy, and the method comprises the following steps: S1, 10mL of acrylonitrile and 20mL of 30%wt hydroxylamine hydrochloride solution are added into a beaker, and then 0.3mL of sodium butoxide is added dropwise into the beaker; the beaker is transferred to a water bath pot, and reacts at 55℃ for 22h to obtain an intermediate. The intermediate and ethylene glycol are blended according to a volume ratio of 1:1 to obtain a eutectic solvent; 20 parts of the eutectic solvent, 1 part of nano-copper and 5 parts of 10%wt nitric acid solution are blended, and the mixture is blended at 55℃ and at 350r / min for 30min, and the prepared corrosion solution is obtained.

[0033] S2, the master alloy material prepared in Example 4 is added to the corrosion solvent for soaking, the mass ratio of the master alloy material and the corrosion solvent is 1:5; the soaking temperature is 35℃, the soaking time is 3h, then deionized water is used for washing, and drying is performed at room temperature until the constant weight, so that the Au-based amorphous alloy is prepared.

[0034] Example 8 The embodiment provides a preparation method of an Au-based amorphous alloy, which comprises the following steps. S1, 15mL of acrylonitrile and 23mL of 40%wt hydroxylamine hydrochloride solution are added to a beaker, then 0.4mL of sodium butoxide is added dropwise into the beaker; the beaker is transferred to a water bath pot, and reaction is performed at 60℃ for 23h to obtain an intermediate. The intermediate and ethylene glycol are blended according to a volume ratio of 1:1 to obtain a eutectic solvent; 25 parts of the eutectic solvent, 2 parts of nano-copper and 7 parts of 12%wt nitric acid solution are blended according to weight parts, and the blending reaction is performed at 60℃ and 450r / min for 50min, so that the prepared corrosion solution is obtained.

[0035] S2, the master alloy material prepared in Example 5 is added to the corrosion solvent for soaking, the mass ratio of the master alloy material and the corrosion solvent is 2:8; the soaking temperature is 40℃, the soaking time is 5h, then deionized water is used for washing, and drying is performed at room temperature until the constant weight, so that the Au-based amorphous alloy is prepared.

[0036] Example 9 The embodiment provides a preparation method of an Au-based amorphous alloy, which comprises the following steps. S1, 20mL of acrylonitrile and 25mL of 50%wt hydroxylamine hydrochloride solution are added to a beaker, then 0.5mL of sodium butoxide is added dropwise into the beaker; the beaker is transferred to a water bath pot, and reaction is performed at 65℃ for 24h to obtain an intermediate. The intermediate and ethylene glycol are blended according to a volume ratio of 1:2 to obtain a eutectic solvent; 25 parts of the eutectic solvent, 2 parts of nano-copper and 10 parts of 15%wt nitric acid solution are blended according to weight parts, and the blending reaction is performed at 65℃ and 550r / min for 60min, so that the prepared corrosion solution is obtained.

[0037] S2, the master alloy material prepared in Example 6 is soaked in the corrosion solvent, the mass ratio of the master alloy material and the corrosion solvent is 3:10; the soaking temperature is 45℃, the soaking time is 6h, then deionized water is used for washing, and drying is performed at room temperature until the constant weight, so that the Au-based amorphous alloy is prepared.

[0038] Comparative Example 1 The difference between the comparative example and Example 9 is that step B2 is cancelled, and 20g of mixed metal powder is used to replace the prepared silicone oil-mixed metal powder system.

[0039] Comparative Example 2 The difference between the present comparative example and Example 9 is that tungsten metal is used to replace the prepared sintered mixed metal powder in the same weight when preparing the master alloy material.

[0040] Comparative Example 3 The difference between the present comparative example and Example 9 is that the preparation method of the etching solution is different when preparing the Au-based amorphous alloy, and the specific steps of S1 are as follows: 25 mL of 30%wt hydroxylamine hydrochloride solution and ethylene glycol are blended in a volume ratio of 1:1 to obtain a eutectic solvent; 25 parts of the eutectic solvent, 2 parts of nano-copper and 10 parts of 15%wt nitric acid solution are blended, and the blended reaction is carried out at 55°C and 350 r / min for 30 min, which is the prepared etching solution.

[0041] Performance detection: 1. The Au-based amorphous alloys prepared in Examples 7-9 and Comparative Examples 1-3 are cut into short rods with a length of 5 mm by using a diamond wire cutting machine, and then the hardness and modulus thereof are detected by using a nano-indenter; the load resolution is 3 nN, and the displacement resolution is 0.003 nm.

[0042] 2. The actual O content of the Au-based amorphous alloys prepared in Examples 7-9 and Comparative Examples 1-3 is determined by using an OHN tester. The Au-based amorphous alloys prepared above are placed into a high-purity graphite crucible and heated to melt, and the oxygen content is determined by an infrared detection cell; the actual oxygen content is detected at two different positions of the center and the surface of each Au-based amorphous alloy, and the average number thereof is taken as the actual oxygen content to ensure the accuracy of the experimental results.

[0043] 3. The Al2O3 crucible and the Au-based amorphous alloys prepared in Examples 7-9 and Comparative Examples 1-3 are sequentially used to test the Tg (glass transition temperature) thereof by using a high-temperature differential scanning calorimeter. High-purity argon gas is used as the protective gas, and the heating rate is adjusted to 20°C / min.

[0044] Table 1-Performance detection data table of the samples

[0045] Data analysis: comparing the data in Table 1, the Au-based amorphous alloys prepared in Examples 7-9 all have high mechanical strength (hardness and modulus). However, in Comparative Example 2, tungsten metal of the same weight is used to replace the preparation of the silicone oil-mixed metal powder. The silicone oil-mixed metal powder system contains five inorganic elements of tungsten, molybdenum, zirconium, boron and silicon, and after high-temperature smelting, the prepared high-temperature metal melt has excellent mechanical strength and heat resistance, which is characterized by high hardness, elastic modulus value and glass transition temperature. Therefore, the hardness value, elastic modulus value and glass transition temperature value of the master alloy material prepared in Comparative Example 2 are lower.

[0046] The Au-based amorphous alloys prepared in Examples 7-9 all have low oxygen content; however, in Comparative Example 1, a silicone oil-mixed metal powder system is prepared by replacing 20g of mixed metal powder. Silicone oil can form a protective film on the surface of the metal during smelting, thereby further reducing the actual oxygen content in the prepared high-temperature metal melt and master alloy material. Therefore, the actual oxygen content of the Au-based amorphous alloy prepared in Comparative Example 1 is higher.

[0047] In Comparative Example 3, hydroxylamine hydrochloride is used as a hydrogen bond acceptor, and the low eutectic solvent formed by the hydrogen bond acceptor and ethylene glycol can perform micro-corrosion on the surface of the master alloy material and form a passivation film. However, the corrosion solvent prepared in Comparative Example 3 has too high corrosion on the Au-based amorphous alloy, thereby affecting the hardness and elastic modulus of the prepared alloy; and the glass transition temperature value is low.

[0048] The above content is only an example and description of the structure of the present application, and those skilled in the art can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, as long as they do not deviate from the structure of the application or exceed the scope defined by the present claims, which shall belong to the protection scope of the present application.

[0049] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0050] The preferred embodiments of the application disclosed above are only to facilitate the elucidation of the application. The preferred embodiments do not describe all the details of the application and limit the application to the specific embodiments. Obviously, many modifications and variations can be made in light of the teachings above. The description is chosen and described in order to provide the best illustration of the application and its practical application to those skilled in the art and to enable those skilled in the art to best utilize the application. The application is only limited by the claims as well as their full scope and equivalents.

Claims

1. A method for preparing an Au-based amorphous alloy, characterized in that, Includes the following steps: S1. By weight percentage, 40-60% Au, 20-25% Al, 10-15% V, and the remaining amount of silicone oil-mixed metal powder are added to an induction melting furnace. The induction melting furnace is evacuated, then high-purity argon gas is introduced, and the mixture is melted to obtain a high-temperature metal melt. The high-temperature metal melt is then sprayed, cut, added to a strip spinning machine for strip spinning, and cooled to prepare the master alloy material. S2. The master alloy material is immersed in a corrosive solvent, washed, and dried to constant weight to obtain the Au-based amorphous alloy.

2. The method for preparing an Au-based amorphous alloy according to claim 1, characterized in that, In step S1, the preparation method of the silicone oil-mixed metal powder includes the following steps: B1. According to the weight, 5-10 parts of tungsten, 5-10 parts of molybdenum, 1-5 parts of zirconium, 1-5 parts of boron and 1-5 parts of silicon are added to a vacuum ball mill and ball-milled to obtain mixed metal powder; the mixed metal powder is sintered to obtain sintered mixed metal powder. B2. The sintered mixed metal powder and silicone oil are blended to obtain a mixed system; the mixed system is ultrasonically dispersed to obtain silicone oil-mixed metal powder.

3. The method for preparing an Au-based amorphous alloy according to claim 2, characterized in that, In step B1, the ball milling speed is 300-350 r / min and the ball milling time is 3-6 h; the sintering temperature is 1500-2000℃ and the sintering pressure is 25-30 MPa; in step B2, the ratio of the sintered mixed metal powder to silicone oil is 10-20 g: 20-30 mL; the ultrasonic power of the mixed system is 20-30 kW and the ultrasonic time is 10-15 min.

4. The method for preparing an Au-based amorphous alloy according to claim 1, characterized in that, In step S1, the gas pressure of the induction melting furnace is set to 0.05-0.08 MPa; the melting temperature of the induction melting furnace is 2100-2200℃; the number of melting cycles is 3-5; and the melting time for each cycle is 5-10 min.

5. The method for preparing an Au-based amorphous alloy according to claim 1, characterized in that, In step S1, the vacuum chamber of the tape-spinning machine is evacuated to 10. -4 ~10 -3 Pa, then introduce inert gas to adjust the chamber pressure to 0.02-0.04 MPa.

6. The method for preparing an Au-based amorphous alloy according to claim 1, characterized in that, In step S2, the method for preparing the corrosive solvent is as follows: Acrylonitrile, 30-50%wt hydroxylamine hydrochloride solution, and sodium butoxide are blended and reacted at 55-65℃ for 22-24h to obtain an intermediate; the intermediate is blended with ethylene glycol to obtain a eutectic solvent; the eutectic solvent, nano-copper, and 10-15%wt nitric acid solution are blended and reacted at 55-65℃ for 30-60min to obtain the prepared corrosion solution.

7. The method for preparing an Au-based amorphous alloy according to claim 6, characterized in that, The ratio of acrylonitrile, hydroxylamine hydrochloride solution, and sodium butoxide is 10-20 mL: 20-25 mL: 0.3-0.5 mL.

8. The method for preparing an Au-based amorphous alloy according to claim 6, characterized in that, The volume ratio of intermediate to ethylene glycol is 1:1-2, and the weight ratio of eutectic solvent, nano-copper and nitric acid solution is 20-30:1-3:5-10.

9. An Au-based amorphous alloy, characterized in that, It is prepared by the preparation method of an Au-based amorphous alloy as described in any one of claims 1-8.

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