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Ce-based amorphous alloy and preparation method thereof

An amorphous alloy, cerium-based technology, applied in the field of cerium-based amorphous alloy and its preparation, amorphous alloy and its preparation, can solve the problems of limited application range, unfavorable engineering application, and inability to do it, and achieve the goal of overcoming mold heat Effects of damage, difficulty reduction, and energy saving

Inactive Publication Date: 2012-07-04
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing Ce-Al-based ternary amorphous alloy can only form 3mm amorphous, even the quaternary Ce-Al-based amorphous can only form 10mm amorphous, and cannot make larger samples, which is extremely It limits the scope of its application, which is not conducive to engineering application

Method used

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  • Ce-based amorphous alloy and preparation method thereof
  • Ce-based amorphous alloy and preparation method thereof
  • Ce-based amorphous alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1, Ce 70 Ga 8.5 Cu 21.5 bulk amorphous alloy

[0033] Using Ce with a purity of 99.5% and Ga and Cu with a purity above 99.9%, according to the chemical formula Ce 70 Ga 8.5 Cu 21.5 The atomic percentage of the alloy is formulated, and the alloy is melted in a vacuum arc melting suction casting furnace with argon gas adsorbed by titanium. The number of melting times is not less than 4 times, so that the composition of the alloy is uniform. After cooling, a master alloy ingot is obtained. Then use the suction casting device in the electric arc furnace to suction cast the remelted master alloy melt into a cylindrical copper mold to obtain a cerium-based amorphous alloy material, heat it above its glass transition temperature, and shape it into a diameter of 14mm Ce 70 Ga 8.5 Cu 21.5 Amorphous alloy rod.

[0034] Ce with a diameter of 14mm 70 Ga 8.5 Cu 21.5 Alloy rods are almost completely amorphous in the as-cast state. Depend on figure 1 It can be...

Embodiment 2-9

[0036] Embodiment 2-9, Ce-Ga-Cu bulk amorphous alloy

[0037] According to the method of Example 1, Examples 2-9 can also obtain bulk amorphous with a critical dimension of at least 2 mm. Its DSC curve and XRD image are listed in image 3 and Figure 7 . Depend on image 3 and Figure 7 It can be seen that the alloy system can easily obtain a bulk amorphous alloy, and the Tg points of the alloy are all around 100°C, which is conducive to processing the alloy in the supercooled liquid phase region. The width of the supercooled liquid phase region of the alloy system is above 29K, which provides a larger temperature selection range for deformation in the supercooled liquid phase region. Lower than the boiling point of water and a larger temperature range can make the amorphous alloy of this alloy series undergo thermoplastic deformation like engineering plastics. Depend on Figure 8 It can be seen that Ce 70 Ga 10 Cu 20 Alloy at glass transition temperature T g Deforma...

Embodiment 10-19

[0043] Embodiment 10-19, Ce-Ga-Cu-Co(Ni) bulk amorphous alloy

[0044] According to the method of Example 1, Examples 10-19 can obtain bulk amorphous with a critical dimension of at least 10 mm. Its characteristic data are shown in Table 2. Figure 4 , Figure 5 . The width of the maximum supercooled liquid phase region Tx of this alloy system is close to 70K at most, and the glass forming ability is generally better than the alloys of Example 1 and Examples 2-9. Although the Tg point of the alloy has increased, it is still below 120°C, which is much lower than the Tg point of other metallic glasses.

[0045] Table 2 Thermophysical parameters of some alloys in Ce-Ga-Cu-Co(Ni) alloy system

[0046] Example

[0047] Note: The DSC experimental heating rate of the samples of each component in the table is 20K / min, and the DSC equipment model: PE8000

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Abstract

The invention discloses a Ce-based amorphous alloy and a preparation method thereof. The Ce-based amorphous alloy comprises the following components according to the atomic percentage: 60-80 percent of Ce, 0.1-20 percent of Ga and 0.1-25 percent of M, wherein M is selected from one or more of Pd, Cu, Zr, Ti, Hf, Fe, Co, Ni and Nb; and the Ce-based amorphous alloy has a minimum amorphous critical diameter of 1-14 millimeters. The Ce-based amorphous alloy provided by the invention has strong glass-forming ability; the crystallization is avoided when the alloy is heated in a supercooled liquid phase region; the amorphous alloy with bulk shape can be very easily obtained; and as known now, an amorphous rod with a maximum diameter of 14 mm can be obtained through component optimization by utilizing a water-cooled copper mould technology.

Description

1. Technical field [0001] The invention relates to an amorphous alloy and a preparation method thereof, in particular to a cerium (Ce)-based amorphous alloy and a preparation method thereof, belonging to the field of amorphous alloys. 2. Background technology [0002] Since the discovery of amorphous alloys in the 1960s, amorphous alloys have extremely wide potential due to their unique mechanical properties, magnetic properties, corrosion resistance, and good biocompatibility that are superior to ordinary alloys. applications, and has received great attention in the field of materials. Amorphous alloy enters the supercooled liquid phase region after glass transition in the heating process, and presents a viscous flow state in the supercooled liquid phase region, and can flow under very low stress (about 2MPa), which is It provides great convenience for future processing and molding, and has great potential application value. In addition, amorphous alloys have less shrinka...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/00
Inventor 张博徐保臣
Owner HEFEI UNIV OF TECH
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