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A kind of ce-al-cu-ag bulk amorphous alloy and preparation method

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, low glass forming ability and supercooling Problems such as the narrow liquid phase region, to achieve the effect of being beneficial to plastic processing and forming, the improvement of width and glass forming ability, and the wide plastic processing and forming

Active Publication Date: 2015-11-25
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • A kind of ce-al-cu-ag bulk amorphous alloy and preparation method
  • A kind of ce-al-cu-ag bulk amorphous alloy and preparation method
  • A kind of ce-al-cu-ag bulk amorphous alloy and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Preparation of Ce 70 Al 10 Cu 20 Bulk amorphous alloy

[0027] Step 1: Combine Ce with a purity of 99.5wt%, Al with 99.9wt% and Cu with 99.9wt% in accordance with Ce 70 Al 10 Cu 20 The specified molar ratio is used for ingredients;

[0028] Step 2: Put the above ingredients uniformly into an electric arc furnace, perform arc smelting in an argon atmosphere adsorbed by titanium, and cool to obtain a master alloy ingot;

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

[0030] X-ray diffraction (XRD) was used to detect the structural features of bulk amorphous alloys. The XRD results of the alloy are as follows figure 1 Shown.

[0031] Differential scanning calorimetry (DSC) was used for thermodynamic analysis of the alloy, and the re...

Embodiment 2

[0032] Example 2: Preparation of Ce 69 Al 10 Cu 20 Ag 1 Bulk amorphous alloy

[0033] Step 1: Set the purity of 99.5wt% Ce, 99.9wt% Al, 99.9wt% Cu and 99.9wt% Ag according to Ce 69 Al 10 Cu 20 Ag 1 The specified molar ratio is used for ingredients;

[0034] Step 2: Put the above ingredients uniformly into an electric arc furnace, arc smelt 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 suck the master alloy melt into a water-cooled copper mold with an inner diameter of 5mm by using the adsorption device in the electric arc furnace to obtain Ce 69 Al 10 Cu 20 Ag 1 Bulk amorphous alloy.

[0036] X-ray diffraction (XRD) was used to detect the structural features of bulk amorphous alloys. The XRD results of the alloy are as follows image 3 Shown.

[0037] Differential scanning calorimetry (DSC) was used for thermodynamic analysis of the alloy, and the relate...

Embodiment 3

[0038] Example 3: Preparation of Ce 68 Al 10 Cu 20 Ag 2 Bulk amorphous alloy

[0039] Step 1: Set the purity of 99.5wt% Ce, 99.9wt% Al, 99.9wt% Cu and 99.9wt% Ag according to Ce 68 Al 10 Cu 20 Ag 2 The specified molar ratio is used for ingredients;

[0040] Step 2: Put the above ingredients uniformly into an electric arc furnace, arc smelt in an argon atmosphere adsorbed by titanium, and cool to obtain a master alloy ingot;

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

[0042] X-ray diffraction (XRD) was used to detect the structural features of bulk amorphous alloys. The XRD results of the alloy are as follows image 3 Shown.

[0043] Differential scanning calorimetry (DSC) was used for thermodynamic analysis of the alloy, and the relate...

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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, and specifically relates to a Ce-Al-Cu-Ag series bulk amorphous alloy and a preparation method Background technique [0002] Bulk amorphous alloy (or bulk metallic glass) material is a new type of material developed in recent years. Since amorphous alloys or metallic glasses are different from traditional oxide glasses, the bonding of atoms in amorphous alloys is mainly metallic bonds rather than covalent bonds, so many metal-related properties are retained. In a sense, the amorphous structure is defect-free, unlike crystalline materials that have dislocations and grain boundaries. The defect-free structure has an important impact on the properties of the material. Due to its unique structure, it has many excellent mechanical properties, such as high strength and hardness, wear resistance, fatigue resistance, etc., as well as good physical and chemical properties. These properties ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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