Lutetium based bulk amorphous alloy and preparation thereof

An amorphous alloy and base block technology, applied in the field of alloys, can solve problems such as limited composition system, and achieve the effects of inhibiting crystallization ability, low critical cooling rate, and abundant rare earth resources

Inactive Publication Date: 2009-08-05
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although people have researched and developed several series of bulk amorphous alloys, their composition systems are still limited.

Method used

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  • Lutetium based bulk amorphous alloy and preparation thereof
  • Lutetium based bulk amorphous alloy and preparation thereof
  • Lutetium based bulk amorphous alloy and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1, Lu 39 Y 16 Al 25 co 20 Preparation of bulk amorphous alloys

[0029] Lu, Y, Al and Co with a purity of more than 99.9% and a molar ratio of 39:16:25:20 are used to prepare a lutetium-based bulk amorphous alloy. Melt in an electric arc furnace with an argon atmosphere, mix evenly, and obtain a master alloy ingot of Lu-Y-Al-Co quaternary alloy after cooling; then use a conventional metal mold casting method to remelt the ingot and use The suction casting device sucks the master alloy melt into the water-cooled copper mold, and the composition is Lu 39 Y 16 Al 25 co 20 , a bulk amorphous alloy with a diameter of 3 to 5 mm.

[0030] Such as figure 1 X-ray diffraction (XRD) shown proves that the alloy is completely amorphous. Such as figure 2 The thermal analysis (DSC) diagram shown, its glass transition temperature (T g ), crystallization onset temperature (T x ), the width of the subcooling interval (ΔT=T x -T g ) are 687, 769 and 83K, respect...

Embodiment 2～9

[0032] Various ratios of lutetium-based bulk amorphous alloys were prepared according to the method of Example 1, and their compositions and thermophysical parameters are listed in Table 1.

[0033] Table 1. Composition and thermophysical parameters of lutetium-based bulk amorphous alloys

[0034] Reality

Shi

example

alloy composition

T g

(K)

T x

(K)

T m

(K)

T l

(K)

ΔTg

(K)

T rg

r 1 Lu 39 Y 16 al 25 co 20 687 769 1072 1117 82 0.641 0.426 2 Lu 55 Al 25 co 20 701 781 1127 1167 80 0.622 0.418 3 Lu 45 Y 10 Al 25 co 20 698 775 1093 1136 77 0.639 0.423 4 Lu 27.5 Y 27.5 al 25 co 20 673 756 1055 1090 83 0.638 0.429 5 Lu 40 Zr 15 al 25 co 20 728 793 1164 1206 65 0.625 0.410 6 Lu 60 Al 30 co 10 714 797 1131 1173 83 0.609 0.422 7 Lu 25 Y 30 Al 20 co 25 669 742...

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Abstract

The invention relates to a lutetium-based block amorphous alloy which takes lutetium as major components and contains at least 50 percent of amorphous phase according to percentages by volume, and the components of the lutetium-based block amorphous alloy are shown as in a formula I, wherein X is zirconium or/and yttrium, a is larger than or equal to 20 and less than or equal to 60, b is larger than or equal to 0 and less than 30, c is larger than or equal to 20 and less than 30, d is larger than or equal to 10 and less than 30, and in addition, a plus b plus c plus c plus d equals 100. A preparation method of the lutetium-based block amorphous alloy comprises the following steps: the components are molten according to required atomic proportions in an electric arc furnace with titanium-absorption argon atmosphere to obtain a master alloy cast ingot; the master alloy cast ingot is remolten by a conventional metal mold casting method, and melts are sucked into a water-cooling copper mould by a suction casting device in the electric arc furnace to obtain the lutetium-based block amorphous alloy. The invention has strong crystallization-inhibited capacity, simple preparation and lower cost and is easy to form large-size amorphous alloy. And the formula I is LuaXbAlcCod.

Description

technical field [0001] The present invention relates to an alloy, in particular to a lutetium-based block with heavy rare earth element lutetium (Lu) as the main component, an appropriate amount of alloying elements added, and at least 50% of the amorphous phase (volume percentage) amorphous alloy. Background technique [0002] Metallic glass is a new type of metal alloy with good application prospects. It has many excellent properties, such as extremely high strength (close to theoretical strength); good elasticity (elastic limit is about 2%, while the general crystalline metal is about 0.2%); good corrosion resistance, radiation resistance, high Wear resistance, and excellent processing ability in the supercooled liquid phase region, etc. [0003] The ability to prepare and form metallic glasses has always been a hot topic of research and concern for researchers and engineers. For bulk metallic glasses, systems with different compositions all have a certain critical dec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/00C22C1/02
Inventor 于海滨余鹏白海洋赵德乾汪卫华
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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