High-entropy bulk amorphous alloy and preparation method thereof

A technology of amorphous alloys and blocks, which is applied in the field of amorphous alloys and high-entropy alloy materials, can solve the problems of low amorphous forming ability and specific strength, and achieve the effects of reducing density, good amorphous forming ability, and improving strength

Active Publication Date: 2018-02-16
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides a high-entropy bulk amorphous alloy and its preparation method. By adopting the approximately equal atomic ratio design of each constituent elem

Method used

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  • High-entropy bulk amorphous alloy and preparation method thereof
  • High-entropy bulk amorphous alloy and preparation method thereof
  • High-entropy bulk amorphous alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1 prepares Zr 31 Ti 27 be 26 Cu 10 Fe 6 bulk amorphous alloy material

[0034] The specific steps are as follows: the first step is to convert the atomic percentage composition of the alloy into mass percentage, and select high-purity zirconium rods, titanium rods, beryllium blocks, copper sheets, nickel blocks and iron blocks (purity not less than 99.95%) as raw materials , after polishing the scale, ultrasonically clean with acetone or alcohol, and use a high-precision balance with an accuracy of 0.0001g for batching; the second step is to prepare master alloy ingots under vacuum and argon protection conditions by arc melting, and each ingot is repeatedly Smelt at least 4 times, and carry out magnetic stirring during the smelting process to ensure that the composition of the alloy ingot is uniform; the third step is to melt the master alloy and suction cast it into a water-cooled oxygen-free copper mold to obtain an alloy rod; the fourth step is to prep...

Embodiment 2

[0035] Embodiment 2 prepares Zr 31 Ti 27 be 26 Cu 10 Al 6 bulk amorphous alloy material

[0036] The specific steps are as follows: the first step is to convert the atomic percentage composition of the alloy into mass percentage, and select high-purity zirconium rods, titanium rods, beryllium blocks, copper sheets, nickel blocks and aluminum blocks (purity not less than 99.95%) as raw materials , after polishing the scale, ultrasonically clean with acetone or alcohol, and use a high-precision balance with an accuracy of 0.0001g for batching; the second step is to prepare master alloy ingots under vacuum and argon protection conditions by arc melting, and each ingot is repeatedly Smelt at least 4 times, and carry out magnetic stirring during the smelting process to ensure that the composition of the alloy ingot is uniform; the third step is to melt the master alloy and suction cast it into a water-cooled oxygen-free copper mold to obtain an alloy rod; the fourth step is to ...

Embodiment 3

[0037] Embodiment 3 prepares Zr 31 Ti 27 be 26 Cu 10 Ag 6 bulk amorphous alloy material

[0038] The specific steps are as follows: the first step is to convert the atomic percentage composition of the alloy into mass percentage, and select high-purity zirconium rods, titanium rods, beryllium blocks, copper sheets, nickel blocks and silver blocks (purity not less than 99.95%) as raw materials , after polishing the scale, ultrasonically clean with acetone or alcohol, and use a high-precision balance with an accuracy of 0.0001g for batching; the second step is to prepare master alloy ingots under vacuum and argon protection conditions by arc melting, and each ingot is repeatedly Smelt at least 4 times, and carry out magnetic stirring during the smelting process to ensure that the composition of the alloy ingot is uniform; the third step is to melt the master alloy and suction cast it into a water-cooled oxygen-free copper mold to obtain an alloy rod; the fourth step is to pr...

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Abstract

The invention belongs to the field of materials of amorphous alloys and high-entropy alloys and discloses a high-entropy bulk amorphous alloy and a preparation method thereof. The high-entropy bulk amorphous alloy comprises the components of, by atomic percent, 25-35% of Zr, 25-35% of Ti, 22-30% of Be, 5-15% of Cu and M, wherein M represents one or two of Al, Fe, Ag, Ni, V and Cr; and when M represents one element, the atomic percent of M is 5-8%, when M represents two elements, M comprises Ni and another element, the atomic percent of Ni is 5-15%, and the atomic percent of the other element is 5-8%. According to the preparation method, electric arc melting is conducted under an inert atmosphere to prepare a master alloy ingot, and then copper mould suction casting/spray casting/pouring forming is adopted. The high-entropy bulk amorphous alloy provided by the invention has the characteristics of being high in amorphous forming capacity, low in density, high in specific strength and thelike; and the application range is wide.

Description

technical field [0001] The invention belongs to the field of amorphous alloys and high-entropy alloy materials, and more specifically relates to a high-entropy bulk amorphous alloy and a preparation method thereof. Background technique [0002] With the lengthening of the flight range and the increase of the speed of the spacecraft, the requirements for the performance of the materials are becoming more and more stringent. The traditional aluminum alloys and titanium alloys are increasingly unable to meet the needs of research, and materials with light weight and high specific strength will have a good application prospects. Amorphous alloy, also known as metallic glass, is a metastable alloy formed by rapid quenching of a melt, and its atomic arrangement is long-range orderly and short-range disordered. Amorphous alloys have excellent mechanical properties, such as high strength, high hardness, large elastic strain, corrosion resistance and wear resistance close to theoret...

Claims

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Application Information

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IPC IPC(8): C22C45/00C22C1/02
CPCC22C1/02C22C45/00C22C1/11
Inventor 龚攀王雨萧王新云王思博邓磊金俊松
Owner HUAZHONG UNIV OF SCI & TECH
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