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Copper-zirconium based amorphous alloy, and preparation method

An amorphous alloy, copper-zirconium-based technology, used in metal processing equipment, control of molten metal pouring from a ladle, and manufacturing tools, etc. Effects of plastic deformation, excellent mechanical properties, high glass forming ability

Inactive Publication Date: 2008-12-24
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to overcome the defects of low crystallization inhibition ability of existing amorphous alloys and the very small size of amorphous alloys obtained by using the prior art, so as to provide a glass-forming ability, strong crystallization inhibition ability, and can be used in very Copper-Zirconium-Based Amorphous Alloy with Larger Size, Ultrahigh Plasticity and High Strength Made at Low Cooling Rate

Method used

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  • Copper-zirconium based amorphous alloy, and preparation method
  • Copper-zirconium based amorphous alloy, and preparation method
  • Copper-zirconium based amorphous alloy, and preparation method

Examples

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Embodiment 1

[0032] Embodiment 1, prepare Cu 55 Zr 45 bulk amorphous alloy

[0033] After the purity of the raw material is 99.9% (weight percent) Cu and Zr components are prepared in a molar ratio of 55:45, mixed evenly and smelted in an electric arc furnace with an argon atmosphere adsorbed by titanium, and Cu is obtained after cooling. 55 Zr 45 The master alloy ingot of the binary alloy is cast; then the ingot is re-melted using the conventional metal mold casting method, and the master alloy melt is sucked into the water-cooled copper mold by using the suction casting device in the electric arc furnace, and the composition is Cu. 55 Zr 45 , a bulk amorphous alloy with a diameter of 1 mm.

[0034] From such as figure 1 The X-ray diffraction (XRD) shown can prove that Cu 55 Zr 45 The alloy is a completely amorphous alloy. figure 2 for Cu 55 Zr 45 Thermal analysis (DSC and DTA) diagrams of bulk amorphous alloys, as can be seen from the figure: its glass transition temperature (...

Embodiment 2～34

[0035] Examples 2-34, preparation of various ratios of copper-zirconium-based bulk amorphous alloys

[0036] According to the method of Example 1, copper-zirconium-based bulk amorphous alloys with various proportions were prepared, and their compositions and thermal physical parameters are listed in Table 1.

[0037] Table 1, composition and thermophysical properties of the copper-zirconium base bulk amorphous alloy of the present invention

[0038]

[0039]

[0040] Note: 1) The meanings of the symbols in the table are as follows: D——the critical diameter under the experimental conditions; T g - glass transition temperature; T x - crystallization start temperature; T l ——melting end temperature; ΔT=T x -T g ——Width of the liquid phase in the subcooling zone; T rg ——Reduced glass temperature; γ——Vitrification index; R——The heating rate used in the measurement of each component sample.

[0041] 2)T rg =T g / T l ;γ=T x / (T g +T l ).

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Abstract

The invention relates to a copper-zirconium-based amorphous alloy, which is mainly composed of copper and zirconium, and whose composition is expressed by the following formula: (Cu1-xZrx)aAlbMc, wherein, 0.40≤x≤ 0.60, 80≤a≤100, 0≤b≤14, 0≤c≤20, and a+b+c=100; metal element M is Y, La, Ce, Pr, Nd, Gd, Tb, Dy, Ho , Er, Ti, Ag, Ga, Hf, Ta, Nb, Ni, Co, or Fe. The preparation of the alloy is to mix the above-mentioned components Cu, Zr, Al and M according to the required atomic ratio in an electric arc furnace with an argon atmosphere adsorbed by titanium, and then melt and cool to obtain a master alloy ingot; then use conventional The metal mold casting method is to remelt the master alloy ingot in the air and cast it in a water-cooled metal mold to obtain the alloy. The alloy has high glass-forming ability, strong ability to inhibit crystallization, and can be made into larger sizes at very low cooling rates.

Description

technical field [0001] The invention belongs to the field of amorphous alloys or metallic glasses, and in particular relates to a copper-zirconium-based amorphous alloy and a preparation method thereof. Background technique [0002] Amorphous alloys or metallic glasses are usually formed by solidification of metal alloys cooled from the liquid state to below the glass transition temperature, before nucleation and crystallization. However, limited by the ability of metal alloys to form amorphous crystals, a high enough cooling rate is necessary to obtain large-sized bulk amorphous crystals. High cooling rates can be obtained by spraying molten metal or alloy onto a conductive substrate that conducts heat very well, but only thin strips or powders can be obtained with this method. [0003] In the past ten years, through the optimization design of alloy composition and the improvement of preparation technology, people broke through the limitation of high-speed cooling conditio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C45/00B22D37/00
Inventor 汤美波余鹏赵德乾潘明祥汪卫华
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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