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Zr-based bulk amorphous alloy containing Sn and Nb, and preparation method and application thereof

An amorphous alloy and bulk technology, which is applied to the application field of nuclear power plant fuel assemblies, can solve the problems of inability to meet the use requirements, poor plasticity of amorphous alloys, shortage of resources, etc., and achieve Zr saving, good plasticity and low comprehensive cost. Effect

Inactive Publication Date: 2013-04-24
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is that high Zr alloys are widely used in existing pressurized water reactor nuclear fuel assemblies, and the problems brought are high cost and shortage of resources; Operating requirements

Method used

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  • Zr-based bulk amorphous alloy containing Sn and Nb, and preparation method and application thereof
  • Zr-based bulk amorphous alloy containing Sn and Nb, and preparation method and application thereof
  • Zr-based bulk amorphous alloy containing Sn and Nb, and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0031] Embodiment 1: Preparation of Zr-Cu-Fe-Al-Sn-Nb series amorphous alloy

[0032] The chemical composition of the zirconium-based alloy is Zr in atomic percent 61.5 Cu 21.5-x Fe 5 Al 11 sn 1 Nb x , x=0, 1, 2, the above formula is used for batching. Among them, Zr has a purity of 99.9wt%, Cu has a purity of 99.98wt%, Fe has a purity of 99.9wt%, Al has a purity of 99.99wt%, Sn has a purity of 99.99wt%, and Nb has a purity of 99.9wt%. The vacuum degree is 1×10 -3 The above master alloys were prepared in an electric arc furnace / water-cooled copper crucible in Pa; the melting atmosphere was high-purity argon (99.999%) that had undergone titanium melting and oxygen consumption, and each alloy ingot was repeatedly smelted 4 times to ensure uniform alloy composition.

[0033] The master alloy ingot was remelted in a vacuum electric arc furnace, and the vacuum degree was set to 1×10 -3 Pa. After it is completely melted, the above-mentioned compositional alloys are quickly ...

Embodiment 2

[0034] Example 2: Zr 61.5 Cu 19.5 Fe 5 Al 11 sn 1 Nb 2 Compressive Properties of Amorphous Alloys

[0035] figure 1 for Zr 61.5 Cu 21.5 Fe 5 Al 12 Compressive stress-strain curves of amorphous alloys. It can be seen from the curve that the amorphous alloy exhibits typical brittle fracture behavior. Zr that the diameter of the present invention is 3mm 61.5 Cu 19.5 Fe 5 Al 11 sn 1 Nb 2 Amorphous rods were cut into compressive test specimens. image 3 Zr shown 61.5 Cu 19.5 Fe 5 Al 11 sn 1 Nb 2 and Zr 61.5 Cu 21.5 Fe 5 Al 12 Amorphous Alloy in 4×10 -4 the s -1 Compressive engineering stress-strain curves at strain rates. Table 1 shows the comparison results of the mechanical properties of the two materials, Zr 61.5 Cu 19.5 Fe 5 Al 11 sn 1 Nb 2 Maximum compressive stress σ of amorphous alloy max Higher than 2500MPa, compression plasticity higher than 15%, significantly higher than Zr 61.5 Cu 21.5 Fe 5 Al 12 Maximum compressive stress and com...

Embodiment 3

[0039] Example 3: Zr 61.5 Cu 19.5 Fe 5 al 11 sn 1 Nb 2 Resistance to Ar Ion Irradiation of Amorphous Alloys

[0040] Zr with a diameter of 3mm prepared above 61.5 Cu 19.5 Fe 5 al 11 sn 1 Nb 2 Amorphous rods are cut into discs with a thickness of 0.6-1mm, polished with sandpaper, surface polished, cleaned with acetone and absolute alcohol, washed with deionized water, and then dried and preserved. With 300keV, the dose is 3×10 16 / cm 2 The Ar ions bombard the surface of the disc sample with a beam density of 0.531μA / cm 2 . like Figure 8 As shown, there is no obvious crystallization peak in the XRD diffraction curve of the sample after irradiation, indicating that the Zr 61.5 Cu 19.5 Fe 5 al 11 sn 1 Nb 2 The alloy still maintains an amorphous structure, which has excellent resistance to Ar ion irradiation.

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Abstract

The invention relates to a Zr-based bulk amorphous alloy containing Sn and Nb, and a preparation method and an application thereof, and especially relates to a Zr61.5Cu19.5Fe5Al11Sn1Nb2 bulk amorphous alloy having the advantages of good plasticity, Ar ion irradiation resistance and H2SO4 corrosion resistance, its preparation method, and its application in the nuclear power station fuel assembly field. The alloy has a full amorphous structure, has a largest compressive stress sigmamax of above 2500MPa and has a compressive plasticity of above 15%. According to the invention, the partial substitution of a fuel assembly high-Zr alloy widely used at present by the amorphous alloy having a lower Zr content is of great significance to the saving of a badly-need material Zr; the preparation method has the advantages of easy process control and low comprehensive cost; and the Zr-based bulk amorphous alloy has the advantages of good plasticity, Ar ion resistance and H2SO4 resistance, so the Zr-based bulk amorphous alloy is likely to be a substitution material for a nuclear power station fuel cladding material.

Description

technical field [0001] The invention relates to an amorphous alloy, in particular to an alloy with good plasticity, resistance to Ar ion irradiation and resistance to H 2 SO 4 Corroded Zr 61.5 Cu 19.5 Fe 5 al 11 sn 1 Nb 2 Bulk amorphous alloys, preparation methods and their application in nuclear power plant fuel assemblies. Background technique [0002] Since the early 1990s, led by Japan and the United States, a series of alloy components with strong amorphous forming ability have been developed. Among them, the critical cooling rate of zirconium-based amorphous alloys is as low as 1K / s, and it is easy to use copper Die casting and water quenching are used to prepare three-dimensional bulk materials. It has been confirmed that the fracture behavior of bulk amorphous crystals is closely related to shear bands, and the formation of shear bands is highly localized. It is generally believed that the viscosity reduction at certain inhomogeneities in metallic glasses is...

Claims

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Application Information

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IPC IPC(8): C22C45/10C22C1/03G21C3/07G21C3/00
CPCY02E30/40Y02E30/30
Inventor 杨滨罗文东李宇翔王西涛
Owner UNIV OF SCI & TECH BEIJING
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