Block copper-based amorphous alloy and preparation method thereof

A copper-based amorphous alloy and block technology, which is applied in the field of amorphous alloy materials, can solve the problems of poor copper-based bulk amorphous formation ability, etc., and achieve high glass formation ability, excellent mechanical properties, and uniform amorphous phase structure Effect

Active Publication Date: 2019-08-27
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ability to form copper-based bulk amorphous alloys is relatively poor at present, and the prior art does not provide a good solution. Aiming at this technical problem, the present invention proposes a composition design and preparation method of bulk copper-based amorphous alloys

Method used

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  • Block copper-based amorphous alloy and preparation method thereof
  • Block copper-based amorphous alloy and preparation method thereof
  • Block copper-based amorphous alloy and preparation method thereof

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preparation example Construction

[0033] The preparation method of bulk CuZrAl (Sn) amorphous alloy comprises the following steps:

[0034] (1) Use bulk Cu, Zr, Al, Sn metals with a purity greater than or equal to 99.9% as raw materials;

[0035] (2) Cleaning the massive Cu, Zr, Al, Sn metals, the cleaning step is specifically through surface grinding, acetone and alcohol cleaning in sequence, and finally drying for later use;

[0036] (3) According to the atomic percentage occupied by each element in the new bulk CuZrAl (Sn) amorphous alloy, it is converted into mass percentage and weighed the ingredients. The ingredients and their atomic percentage content are: 43 ~ 48at. 10 at.% Al, 0~2at.% Sn, and the rest of Cu; the raw materials are placed in a copper crucible, and the order of placement is: (from bottom to top) bulk Cu, bulk Al and Sn, bulk Zr ;

[0037] (4) Vacuumize the high-vacuum magnetron tungsten electric arc furnace to 5-10Pa, and then fill it with high-purity argon, repeating this three times;...

Embodiment 1

[0045] The main components of the copper-based amorphous alloy of the present embodiment are Cu, Zr, Al, and the atomic percentage (at.%) contents of each element are respectively:

[0046] Zr 45.1

[0047] Al 7.4

[0048] Cu balance

[0049] Its preparation method is:

[0050] The Cu, Zr and Al metals with industrial purity were surface polished, cleaned with acetone and alcohol in sequence, and finally dried for use; Cu 47.5 Zr 45.1 al 7.4 (at.%) converted to mass percentage Cu 41.17 Zr 56.11 al 2.72 (wt.%), carry out weighing ratio; vacuumize the high-vacuum magnetron tungsten electric arc furnace to 5-10Pa, then fill it with high-purity argon, and repeat this three times; then high-vacuum magnetron tungsten Vacuumize the electric arc furnace to 2.0~5.0×10 -3 Pa; then fill the furnace cavity with high-purity argon to 0.45-0.55MPa, melt the above-mentioned raw materials in this atmosphere, and pass in circulating water for cooling; before melting the raw materials, ...

Embodiment 2

[0053] The main components of the copper-based amorphous alloy of this embodiment are Cu, Zr, Al and Sn, and the atomic percentage (at.%) contents of each element are respectively:

[0054] Zr 45.8

[0055] Al 6.4

[0056] Sn 0.5

[0057] Cu balance

[0058] Its preparation method is:

[0059] The Cu, Zr, Al, Sn metals of industrial purity are surface polished, cleaned with acetone and alcohol in sequence, and finally dried for use; Cu 47.3 Zr 45.8 al 6.4 sn 0.5 (at.%) converted to mass percentage Cu 40.53 Zr 56.34 al 2.33 sn 0.8 (wt.%), carry out weighing ratio; vacuumize the high-vacuum magnetron tungsten electric arc furnace to 5-10Pa, then fill it with high-purity argon, and repeat this three times; then high-vacuum magnetron tungsten The electric arc furnace is evacuated to 2.0-5.0×10-3Pa; then the furnace cavity is filled with high-purity argon to 0.45-0.55MPa, and the above-mentioned raw materials are smelted in this atmosphere, the smelting current is 100-25...

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Abstract

The invention relates to a large-block copper-based amorphous alloy and a preparation method thereof. The large-block copper-based amorphous alloy comprises the following components of, by atomic percent, 43-48 at.% of Zr, 5-10 at.% of Al, 0-2 at.% of Sn and the balance Cu. According to the large-block copper-based amorphous alloy and the preparation method thereof, the novel copper-based large-block amorphous alloy with the critical casting diameter of 3 mm in a Cu-Zr-Al system and a Cu-Zr-Al-Sn system is directly determined through combination of thermodynamic calculation and a binary eutectic ratio method; and the generation of a precipitation phase is inhibited by regulating and controlling the binary eutectic ratio, and the large-block amorphous alloy with the critical casting diameter of 5 mm and the large-block amorphous alloy with the critical casting diameter of 7 mm are obtained in the Cu-Zr-Al system and the Cu-Zr-Al-Sn system correspondingly.

Description

technical field [0001] The invention belongs to the field of amorphous alloy materials, in particular to a bulk copper-based amorphous alloy and a preparation method thereof. Background technique [0002] As a new type of structural and functional material, amorphous alloy has many excellent physical, chemical and mechanical properties, such as high strength, hardness, wear resistance and corrosion resistance, etc., and has broad potential application prospects in the industrial field. At the same time, amorphous alloys also help people understand and understand the nature of glassy substances, and have important scientific research value. Compared with some current bulk amorphous alloy systems with higher amorphous forming ability, such as Zr-based, Pt-based and Pd-based, Cu-based bulk amorphous alloys have lower amorphous forming ability, but their raw material costs are low. aroused widespread concern. In 1995, the W.L.Johnson research group in the United States develop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/00C22C1/02
CPCC22C45/001C22C1/02C22C2200/02C22C1/11
Inventor 魏先顺沈军江浩然
Owner TONGJI UNIV
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