Zirconium-based bulk amorphous alloy and preparation method thereof

An amorphous alloy and bulk technology, which is applied in the field of zirconium-based bulk amorphous alloy and its preparation, can solve the problems of limiting the application of amorphous alloy, changing the properties of amorphous alloy, and limiting plastic deformation ability at room temperature, and achieves good application. Potential effect

Inactive Publication Date: 2020-11-27
YANSHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the existing amorphous alloys have the following technical problems: (1) the size of existing amorphous alloys is limited, which limits the application of amorphous alloys in structural materials; Microstructure, there is no plastic deformation mechanism such as dislocation slip, twinning and work hardening during deformation, and severe stress concentration will occur when stress is loaded, and cause shear band softening, which eventually leads to limited room temperature plastic deformation ability; ( 3) Amorphous alloy is a metastable material, which is prone to crystallization behavior when it is used in hot forming or in an environment above the glass transition temperature, and precipitates crystalline phases with complex structures and uneven distribution, which will change the amorphous alloy. properties, which not only further reduce its room temperature plasticity, but also greatly harm its corrosion resistance, soft magnetic properties and other properties.

Method used

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  • Zirconium-based bulk amorphous alloy and preparation method thereof
  • Zirconium-based bulk amorphous alloy and preparation method thereof
  • Zirconium-based bulk amorphous alloy and preparation method thereof

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preparation example Construction

[0028] The present invention provides a method for preparing a zirconium-based bulk amorphous alloy described in the above technical solution, comprising the following steps:

[0029] mixing metal raw materials corresponding to the zirconium-based bulk amorphous alloy, and melting to obtain a master alloy ingot;

[0030] A water-cooled copper mold is used to suction-cast the master alloy ingot to obtain a zirconium-based bulk amorphous alloy.

[0031] According to the invention, metal raw materials corresponding to the zirconium-based bulk amorphous alloy are mixed and smelted to obtain master alloy ingots. The present invention has no special limitation on the mixing process, and the mixing can be carried out according to the well-known process in the art.

[0032] In the present invention, the smelting is preferably carried out in a non-consumable arc smelting furnace. Before the smelting, the vacuum of the cavity of the non-consumable arc smelting furnace is preferably eva...

Embodiment 1

[0041] Preparation of Zr 60 Cu 25 Al 10 Fe 4 Ag 1 (X=1) bulk amorphous alloy, the specific atomic percentage is shown in Table 1:

[0042] will be composed of Zr 60 Cu 25 Al 10 Fe 4 Ag 1 The alloy is proportioned according to the atomic ratio converted into the weight ratio. The total mass of the prepared raw materials is 30g, and the metallic materials zirconium, copper, aluminum, iron and granular silver in the shape of filaments (cut into short wires with a length of 10mm) are weighed respectively. Re-batching, mixing the prepared raw materials into the copper crucible of the non-consumable arc melting furnace, and pumping the vacuum degree of the non-consumable arc melting furnace cavity to 6×10 -3 Below Pa, fill with argon until the cavity pressure is 0.45MPa, and then smelt the titanium block to absorb the residual oxygen in the environment;

[0043] Under the protection of argon (the pressure of the argon protective atmosphere is 0.45MPa), the 30g raw material...

Embodiment 2

[0047] The difference with Example 1 is: the preparation of Zr 60 Cu 25 Al 10 Fe 3 Ag 2 (X=2) bulk amorphous alloy, the others are the same as in Example 1, and the specific atomic percentages are shown in Table 1. figure 1 Zr is shown in 60 Cu 25 Al 10 Fe 3 Ag 2 (X=2) An amorphous alloy with a critical diameter of alloy composition of 8mm. The experimental data in this embodiment given in Table 2 and Table 3 are all obtained from the experimental results of an amorphous cast rod with a diameter of 8mm.

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Abstract

The invention provides a zirconium-based bulk amorphous alloy and a preparation method thereof and belongs to the technical field of amorphous alloys. A proper amount of silver element is used for replacing the iron element in the existing amorphous alloy Zr<60>Cu<25>Al<10>Fe<5>, the replacement of the iron element with the silver element causes the component segregation on an atomic scale in an atomic stacking structure in the amorphous alloy, and a large number of high-density short-range ordered structures (such as an icosahedron short program, a distorted icosahedron short program and thelike) are formed, so that the amorphous forming capability and the mechanical property of the system are obviously improved, the viscosity and the stability of an amorphous melt are obviously increased, and the reheating crystallization behavior of the material is greatly inhibited, namely the room-temperature plastic deformation capability, the amorphous forming capability, the thermal stabilityand the mechanical property of the amorphous alloy can be improved by replacing the Fe element with the Ag element.

Description

technical field [0001] The invention relates to the technical field of amorphous alloys, in particular to a zirconium-based bulk amorphous alloy and a preparation method thereof. Background technique [0002] Amorphous alloy, also known as metallic glass, is a new type of alloy material with long-range disorder and short-range order obtained by using various modern rapid solidification metallurgical techniques. Bulk amorphous alloys generally refer to amorphous alloys with a critical diameter or thickness exceeding 1mm. When the metal melt solidifies at an extremely fast cooling rate, its nucleation and growth processes are inhibited, and the disordered microstructure inside the melt is directly "frozen". Therefore, amorphous alloys can also be called liquid metals . Because of this microstructure different from the "long-range order" of crystalline alloys, amorphous alloys are endowed with many excellent physical and chemical properties, such as high strength, high hardne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/10C22C1/03A61L27/04
CPCC22C45/10C22C1/03A61L27/047C22C1/11
Inventor 马明臻李博张新宇刘日平
Owner YANSHAN UNIV
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