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Ce-Al-Cu-Ag bulk amorphous alloy and preparation method thereof

A ce-al-cu-ag, amorphous alloy technology, applied in the field of Ce-Al-Cu-Ag bulk amorphous alloy and its preparation, can solve the problem of poor superplastic processing ability, small glass forming ability, supercooling Narrow liquid phase zone and other problems, to achieve the effect of plastic processing and forming, width and glass forming ability improvement, wide plastic processing and forming

Active Publication Date: 2014-07-23
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the supercooled liquid phase region of this system alloy is narrow, which makes it poor in superplastic processing ability in the supercooled liquid phase region, and because of its small glass forming ability (only 2mm), it is not convenient to process it, so Seriously limit its application in industrial production

Method used

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  • Ce-Al-Cu-Ag bulk amorphous alloy and preparation method thereof
  • Ce-Al-Cu-Ag bulk amorphous alloy and preparation method thereof
  • Ce-Al-Cu-Ag bulk amorphous alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: prepare Ce 70 al 10 Cu 20 bulk amorphous alloy

[0027] Step 1: Purity of 99.5wt% Ce, 99.9wt% Al and 99.9wt% Cu according to Ce 70 al 10 Cu 20 The specified molar ratio is used for batching;

[0028] Step 2: Mix the above ingredients evenly and put them into an electric arc furnace, perform arc melting in an argon atmosphere adsorbed by titanium, and cool to obtain a master alloy ingot;

[0029] Step 3: Re-melt the master alloy ingot obtained above under the above conditions, and use the adsorption device in the electric arc furnace to suck the master alloy melt into a water-cooled copper mold with an inner diameter of 3 mm to obtain Ce 70 Al 10 Cu 20 bulk amorphous alloy.

[0030] The structural features of bulk amorphous alloys were detected by X-ray diffraction (XRD). The XRD results of the alloy are as follows figure 1 shown.

[0031] The alloy was thermodynamically analyzed by differential scanning calorimetry (DSC), and the relevant thermod...

Embodiment 2

[0032] Embodiment 2: preparation Ce 69 Al 10 Cu 20 Ag 1 bulk amorphous alloy

[0033] Step 1: Purity of 99.5wt% Ce, 99.9wt% Al, 99.9wt% Cu and 99.9wt% Ag into Ce 69 Al 10 Cu 20 Ag 1 The specified molar ratio is used for batching;

[0034] Step 2: Mix the above ingredients evenly and put them into an electric arc furnace, perform arc melting in an argon atmosphere adsorbed by titanium, and cool to obtain a master alloy ingot;

[0035] Step 3: Remelt the master alloy ingot obtained above under the above conditions, and use the adsorption device in the electric arc furnace to suck the master alloy melt into a water-cooled copper mold with an inner diameter of 5 mm to obtain Ce 69 Al 10 Cu 20 Ag 1 bulk amorphous alloy.

[0036] The structural features of bulk amorphous alloys were detected by X-ray diffraction (XRD). The XRD results of the alloy are as follows image 3 shown.

[0037] The alloy was thermodynamically analyzed by differential scanning calorimetry (DSC...

Embodiment 3

[0038] Embodiment 3: preparation Ce 68 Al 10 Cu 20 Ag 2 bulk amorphous alloy

[0039] Step 1: Purity of 99.5wt% Ce, 99.9wt% Al, 99.9wt% Cu and 99.9wt% Ag into Ce 68 Al 10 Cu 20 Ag 2 The specified molar ratio is used for batching;

[0040] Step 2: Mix the above ingredients evenly and put them into an electric arc furnace, perform arc melting in an argon atmosphere adsorbed by titanium, and cool to obtain a master alloy ingot;

[0041] Step 3: Re-melt the master alloy ingot obtained above under the above conditions, and use the adsorption device in the electric arc furnace to suck the master alloy melt into a water-cooled copper mold with an inner diameter of 7 mm to obtain Ce 68 Al 10 Cu 20 Ag 2 bulk amorphous alloy.

[0042] The structural features of bulk amorphous alloys were detected by X-ray diffraction (XRD). The XRD results of the alloy are as follows image 3 shown.

[0043] The alloy was thermodynamically analyzed by differential scanning calorimetry (DS...

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Abstract

The invention relates to a Ce-Al-Cu-Ag bulk amorphous alloy with a low glass transition temperature and a wide supercooled liquid region. By taking Ce70Cu20Al10 as a basic component and the metal element Ag which belongs to the same main group with Cu as an alloying element, the composition of the alloy is determined by the follow formula: CeyAl10Cu20Agx, wherein x is the atomic percentage of the metal element Ag, y is the atomic percentage of Ce, x is greater than or equal to 1 but less than or equal to 5, y is greater than or equal to 65 but less than or equal to 69, and (x+y)=70. The alloy can form the bulk amorphous alloy with the critical dimension no less tan 3mm and the maximum supercooled liquid region reaching 95K. The alloy integrates low glass transition temperature, wide supercooled liquid region and good glass forming capacity. By means of the low glass transition temperature similar to a common polymer, the alloy can be used as an ideal material which researches phase change and structural relaxation of the metallic glass. By means of excellent conductivity and near-room-temperature super-plastic forming property, the alloy is expected to have a good application prospect in precise components and nano-meter fabrication.

Description

technical field [0001] The invention belongs to the field of amorphous alloys or metallic glasses, in particular to a Ce-Al-Cu-Ag bulk amorphous alloy and its preparation method Background technique [0002] Bulk amorphous alloy (or bulk metallic glass) materials are new materials developed in recent years. Since amorphous alloys or metallic glasses differ from conventional oxide glasses in that the bonding of atoms in amorphous alloys is primarily metallic rather than covalent, many of the properties associated with metals are preserved. In a sense, the amorphous structure is defect-free. Unlike crystalline materials, there are dislocations and grain boundaries. The defect-free structure has an important impact on the performance of the material. Due to its unique structure above, it has many excellent mechanical properties, such as high strength and hardness, wear resistance, fatigue resistance, etc., and also has good physical and chemical properties. These properties ar...

Claims

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Application Information

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IPC IPC(8): C22C45/00
Inventor 刘雄军杨铭杜清王辉吴渊吕昭平
Owner UNIV OF SCI & TECH BEIJING
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