Ce-Ga-Cu-Al bulk amorphous alloy

A ce-ga-cu-al, 1. ce-ga-cu-al technology, applied in the field of Ce-Ga-Cu-Al bulk amorphous alloys, can solve the problem that the critical size of amorphous alloys is not large enough and the limitation Wider application and other issues, to achieve the effect of promoting wide application and improving thermal stability

Active Publication Date: 2014-12-03
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, the critical size of Ce-based bulk amorphous alloys is not large e

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Ce 69 Ga 8 Cu 22 Al 1 Preparation of Bulk Amorphous Alloy

[0028] Step 1: use Ce with a purity of 99.27wt.% and Ga, Cu and Al with a purity above 99.9wt.%, according to the chemical formula Ce 69 Ga 8 Cu 22 Al 1 The atomic percentage of the alloy is prepared, and the alloy is melted in the vacuum arc melting suction casting furnace in the argon atmosphere adsorbed by titanium. The number of melting times is not less than 4 times to make the alloy composition uniform. After cooling, a master alloy ingot is obtained.

[0029] Step 2: Put the master alloy ingot obtained in step 1 on the argon-protected water-cooled copper mold for melting, and then use the suction casting device in the electric arc furnace to suck the remelted master alloy melt into the In cylindrical copper molds with diameters of 6mm and 8mm, Ce 69 Ga 8 Cu 22 Al 1 Alloy bars.

[0030] Step 3: Characterize the structure of the bulk amorphous alloy by X-ray diffraction, the results...

Embodiment 2

[0032] Example 2: Ce 68 Ga 8 Cu 22 Al 2 Preparation of Bulk Amorphous Alloy

[0033] Step 1: use Ce with a purity of 99.27wt.% and Ga, Cu and Al with a purity above 99.9wt.%, according to the chemical formula Ce 68 Ga 8 Cu 22 Al 2 The atomic percentage of the alloy is prepared, and the alloy is melted in the vacuum arc melting suction casting furnace in the argon atmosphere adsorbed by titanium. The number of melting times is not less than 4 times to make the alloy composition uniform. After cooling, a master alloy ingot is obtained.

[0034] Step 2: Put the master alloy ingot obtained in step 1 on the argon-protected water-cooled copper mold for melting, and then use the suction casting device in the electric arc furnace to suck the remelted master alloy melt into the In cylindrical copper molds with diameters of 8mm and 10mm, Ce 68 Ga 8 Cu 22 Al 2 Alloy bars.

[0035] Step 3: characterize the structure of the sample made in step 2 by X-ray diffraction method, th...

Embodiment 3

[0037] Example 3: Ce 67 Ga 8 Cu 22 Al 3 Preparation of Bulk Amorphous Alloy

[0038] Step 1: use Ce with a purity of 99.27wt.% and Ga, Cu and Al with a purity above 99.9wt.%, according to the chemical formula Ce 67 Ga 8 Cu 22 Al 3The atomic percentage of the alloy is prepared, and the alloy is melted in the vacuum arc melting suction casting furnace in the argon atmosphere adsorbed by titanium. The number of melting times is not less than 4 times to make the alloy composition uniform. After cooling, a master alloy ingot is obtained.

[0039] Step 2: Put the master alloy ingot obtained in step 1 on the argon-protected water-cooled copper mold for melting, and then use the suction casting device in the electric arc furnace to suck the remelted master alloy melt into the In cylindrical copper molds with diameters of 10mm and 12mm, Ce 67 Ga 8 Cu 22 Al 3 Alloy bars.

[0040] Step 3: characterize the structure of the sample made in step 2 by X-ray diffraction method, th...

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Abstract

The invention discloses Ce-Ga-Cu-Al bulk amorphous alloy which has a structural formula of Ce[70-x]Ga8Cu22Alx, wherein x is atomic percent of Al and is not less than 1 and not more than 6. Compared with corresponding ternary Ce-Ga-Cu bulk amorphous alloy, the Ce-Ga-Cu-Al bulk amorphous alloy has the characteristics that both the glass forming ability and the thermal stability are improved, and the excellent property of relatively low glass-transition temperature of Ce-Ga-Cu alloy is still kept; the Ce-Ga-Cu-Al bulk amorphous alloy is favorable for promoting relatively wide application of Ce amorphous alloy.

Description

1. Technical field [0001] The invention relates to the field of amorphous alloys, in particular to a method for preparing Ce-Ga-Cu-Al bulk blocks with excellent amorphous forming ability, lower glass transition temperature and higher thermal stability by means of element replacement amorphous alloy. 2. Background technology [0002] Due to its special microstructure, amorphous alloys have excellent mechanical properties, physical properties, chemical properties, magnetic properties and good biocompatibility, so they have received great attention from many fields and are considered to have a wide range of applications potential. [0003] Research on the glass-forming ability of amorphous alloys has long been a hot spot for scientific researchers. At present, a large number of amorphous alloy systems such as Zr-based, Pd-based, Fe-based, Cu-based, Ti-based, Mg-based, rare earth-based, etc. have been developed. Among these systems, Ce-based bulk amorphous alloys are consider...

Claims

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Application Information

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IPC IPC(8): C22C45/00
Inventor 张博周友朱振西
Owner HEFEI UNIV OF TECH
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