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A low-cost zirconium-based amorphous alloy with wide supercooled liquid phase region

A technology of zirconium-based amorphous alloy and supercooled liquid phase region, which is applied in the field of zirconium-based amorphous alloy, can solve the problems of high preparation cost of zirconium-based amorphous alloy, and achieve the goal of improving the practical application range, reducing preparation cost and low cost Effect

Active Publication Date: 2016-11-30
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a zirconium-based amorphous alloy, through appropriate composition design, develop a bulk amorphous alloy with strong glass forming ability and wide supercooled liquid phase region, to solve the problem of existing zirconium-based amorphous alloys The problem of high production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1 Zr 35 Ti 27 Cu 8 be 27 Nb 3

[0023] Manufactured by copper mold casting.

[0024] Step 1: Preparation of master alloy. Zirconium blocks, titanium blocks, copper ingots, beryllium blocks, and niobium blocks are converted into weight percentages according to the atomic percentages in the design composition before batching. The purity of various metal raw materials is industrial purity. Adjust the vacuum degree of the vacuum chamber of the smelting furnace to 2*10 -3 Pa~5*10 -3 Pa, and then filled with high-purity argon to make the vacuum of the vacuum chamber to 0.1*10 5 Pa~0.8*10 5 Pa, and then put in raw materials for smelting. When smelting, first put high melting point metals Zr, Ti and Nb to form alloy ingots, then add low melting point metals Cu and Be for smelting, the smelting process is repeated 3 to 5 times, after the melting is uniform, the master alloy ingots are obtained after cooling .

[0025] Step 2: Preparation o...

Embodiment 2

[0027] Example 2 Zr 35 Ti 28 Cu 8 be 27 Nb 2

[0028] Prepared by water quenching.

[0029] The bulk pure metals Zr, Ti, Cu, Be, Nb (purity can be industrial purity) are non-consumable smelted into a uniform master alloy ingot in a high-purity Ar protective atmosphere according to the selected atomic composition ratio. During smelting, first put high melting point metals Zr, Ti and Nb to form an alloy ingot, and then add low melting point metals Cu and Be for smelting to reduce the loss on ignition of low melting point metals and ensure the accuracy of alloy composition. The smelting process needs to be repeated 3 to 5 times. Crush the master alloy ingot into a quartz glass tube, and apply a high vacuum (~10 -3 Pa) after packaging. Heat it in a resistance furnace to 200K higher than the melting point of the alloy and keep it for 1 hour to remelt it, mix it evenly, and finally perform water quenching to obtain a bulk amorphous alloy with a selected c...

Embodiment 3

[0031] Example 3 Zr 35 Ti 29 Cu 8 be 27 Nb 1

[0032] Manufactured by copper mold casting.

[0033] Step 1: Preparation of master alloy. Zirconium blocks, titanium blocks, copper ingots, beryllium blocks, and niobium blocks are converted into weight percentages according to the atomic percentages in the design composition before batching. The purity of various metal raw materials is industrial purity. Adjust the vacuum degree of the vacuum chamber of the smelting furnace to 2*10 -3 Pa~5*10 -3 Pa, and then filled with high-purity argon to make the vacuum of the vacuum chamber to 0.1*10 5 Pa~0.8*10 5 Pa, and then put in raw materials for smelting. When smelting, first put high melting point metals Zr, Ti and Nb to form alloy ingots, then add low melting point metals Cu and Be for smelting, the smelting process is repeated 3 to 5 times, after the melting is uniform, the master alloy ingots are obtained after cooling .

[0034]Step 2: Preparation of...

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PUM

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Abstract

The invention discloses a zirconium-based amorphous alloy with low cost and wide supercooled liquid phase region. The atomic percentage expression of its alloying elements is Zr a Ti b Cu c be d Nb e Ta f , where 32≤a≤38, 27≤b≤33, 6≤c≤10, 25≤d≤29, 0≤e≤3, 0≤f≤0.5, and e and f are not zero at the same time, a+b +c+d+e+f=100. The obvious advantages of the present invention are: significantly reducing the cost of preparing amorphous alloys: in the past, pure metal raw materials with a purity as high as 99.99% or even 99.9999% were required to be used in the preparation of amorphous alloys, while the alloy system of the present invention only needs pure metals with industrial purity The raw materials are enough, which greatly reduces the preparation cost of the amorphous alloy and improves the practical application range of the amorphous alloy; the amorphous alloy of this system has a low elastic modulus and good plasticity; the amorphous alloy material has relatively Wide supercooled liquid phase region, the range of the supercooled liquid phase region is about 160 ℃, and has good thermoplastic forming ability; the low cost and high thermoplastic forming ability of this series of alloys ensure that this series of amorphous alloys are used in structural materials, medical It has broad application prospects in the fields of medical equipment and so on.

Description

technical field [0001] The invention belongs to the technical field of amorphous alloys, and relates to a zirconium-based amorphous alloy with low cost and wide supercooled liquid phase region. Background technique [0002] As a new type of material, bulk amorphous alloys have better mechanical, physical and chemical properties than crystalline materials due to their special atomic arrangement structure, such as high strength, high fracture toughness, high elastic limit, low The elastic modulus and excellent corrosion resistance make amorphous alloys have great application potential in many fields, such as machinery, electronics, chemical industry, biomedicine, aerospace and military fields. [0003] Zirconium-based amorphous alloys are the most valuable high-strength structural materials in the amorphous alloy system due to their excellent properties, high glass-forming ability and low critical cooling rate. However, in the previous preparation process of zirconium-based a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C45/10C22C1/02
Inventor 孔见邵学丽
Owner NANJING UNIV OF SCI & TECH