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Zr-based amorphous alloy having strong glass-forming ability

A zirconium-based amorphous alloy and glass technology, applied in the field of zirconium-based amorphous alloys, can solve problems such as small size and limited application range

Active Publication Date: 2014-07-23
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the small size of these metallic glasses, its application range is greatly limited.

Method used

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  • Zr-based amorphous alloy having strong glass-forming ability
  • Zr-based amorphous alloy having strong glass-forming ability
  • Zr-based amorphous alloy having strong glass-forming ability

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: Casting Zr 51.1 Hf 4 Ti 3.9 Ni 22 al 19 Alloy rods (nominal composition is atomic percentage, the same below)

[0019]Using commercially available pure metal Zr, Hf, Ti, Ni, Al elements such as rods, blocks, ingots, plates and other bulk materials (purity higher than 99.5%, weight percentage) as starting materials, in an argon atmosphere purified by titanium The lower electric arc is smelted into a five-element master alloy ingot. The master alloy ingot needs to be smelted several times to ensure the uniformity of the composition. Take 40 grams of master alloy material and place it in a water-cooled copper crucible, heat it in an electric arc furnace to above the melting point, turn over the water-cooled copper crucible after melting, and pour the melt into a copper mold. The geometric shape of the inner cavity of the copper mold is φ8mm×110mm (different diameters and lengths or other geometric shapes can be selected according to needs). After the melt...

Embodiment 2

[0020] Example 2: Casting Zr 53.1 Hf 2 Ti 3.9 Ni 22 al 19 Alloy bar

[0021] Using commercially available pure metal Zr, Hf, Ti, Ni, Al elements such as rods, blocks, ingots, plates and other bulk materials (purity higher than 99.5%, weight percentage) as starting materials, in an argon atmosphere purified by titanium The lower electric arc is smelted into a five-element master alloy ingot. The master alloy ingot needs to be smelted several times to ensure the uniformity of the composition. Take 35 grams of master alloy material and place it in a water-cooled copper crucible, heat it in an electric arc furnace to above the melting point, turn over the water-cooled copper crucible after melting, and pour the melt into a copper mold. The geometric shape of the inner cavity of the copper mold is φ7mm×110mm. After the melt is cooled, an amorphous wafer rod with a diameter of 7 mm and a length of 80 mm is formed.

Embodiment 3

[0022] Example 3: Suction casting Zr 52.9 Hf 3.9 Ti 4.1 Ni 22 al 17.1 Alloy bar

[0023] Using commercially available pure metal Zr, Hf, Ti, Ni, Al elements such as rods, blocks, ingots, plates and other bulk materials (purity higher than 99.5%, weight percentage) as starting materials, in an argon atmosphere purified by titanium The lower electric arc is smelted into a five-element master alloy ingot. The master alloy ingot needs to be smelted several times to ensure the uniformity of the composition. Take 2.5 grams of master alloy material and place it in a water-cooled copper crucible, heat it in an electric arc furnace to above the melting point, increase the current immediately after melting, the viscosity of the melt decreases, and it is sucked into the copper mold due to its own gravity. It is also possible to add an appropriate amount of pressure difference between the electric arc furnace and the inner cavity of the copper mold, and rely on the pressure differen...

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Abstract

The invention aims to provide a Zr-based amorphous alloy having a strong glass-forming ability, and is characterized in that the alloy is composed of five elements of Zr, Hf, Ti, Ni and Al; the component expression formula of the alloy is Zra-Hfb-Tic-Nid-Ale, wherein the atomic percentages (at.%) of the elements comprise: a=48-56, b=1.5-8, c=1.5-8, d=19-25, e=17.1-21, and a+b+c+d+e=100. The critical diameter of a completely amorphous bar material formed by the preferred components under copper mold casting conditions can reach 8 mm, and after an alloy melt in the composition range is subjected to copper mold casting, bulk materials with an amorphous structure or parts can be formed. At the same time, the alloy has the characteristics of high fracture strength, high elastic limit, high fracture toughness, corrosion resistance and the like.

Description

technical field [0001] The invention belongs to the field of amorphous alloys, and particularly provides a zirconium-based amorphous alloy with strong glass forming ability. Background technique [0002] Metallic glass specifically refers to an amorphous alloy obtained by rapid cooling of a melt. Different from ordinary crystalline alloys, the structural characteristics of amorphous alloys are long-range disorder and short-range order of atomic arrangement. Therefore, metallic glasses have neither lattice structure nor other microscopic defects such as grain boundaries and dislocations. Compared with ordinary crystalline metal materials, metallic glasses have excellent properties such as high elastic limit, high fracture strength, and corrosion resistance. [0003] During the solidification process of the alloy melt, the metallic glass can only be obtained by extracting the heat of the melt at a sufficiently fast cooling rate in a very short time and inhibiting the crystal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/10
Inventor 沈勇宋贞强徐坚
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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