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Method for preparing Mg-base large-block amorphous alloy

An amorphous alloy and bulk technology, which is applied in the field of preparing Mg-based bulk amorphous alloys, can solve problems such as reducing the cooling rate, and achieve the effects of easy operation, simplified process flow and simple equipment.

Inactive Publication Date: 2010-09-22
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Subsequent refilling with an inert gas to cool the glass transition occurs, but the induced vortex necessary to maintain suspension during cooling slows down the actual cooling rate

Method used

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  • Method for preparing Mg-base large-block amorphous alloy
  • Method for preparing Mg-base large-block amorphous alloy
  • Method for preparing Mg-base large-block amorphous alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Formulated Mg 65 Cu 25 Y 10 master alloy, and cut it into a block with a size of about 8mm×5mm×3mm. After polishing off the oxide layer with a polishing machine, seal 6 pieces of master alloy raw materials in a quartz glass tube with a vacuum degree of about 10 -4 Pa. Using XG-30 audio frequency induction heating equipment, the molten master alloy was heated for 40s under the output oscillating current of 750A, and then cooled in liquid nitrogen for 15s to below -20°C. Get Mg with an effective thickness dimension of 5mm 65 Cu 25 Y 10 Bulk amorphous alloy with a very small amount of CuMg in the alloy 2 Nanocrystalline phase and Cu 2 Y nanocrystalline phase.

[0031] Such as figure 1 In the selected area electron diffraction pattern of the bulk amorphous alloy prepared in Example 1 shown, uniform and continuous amorphous diffuse rings with ideal diameters can be clearly identified, which proves that the main proportion of amorphous state, but the outline of a sm...

Embodiment 2

[0034] Formulated Mg 65 Cu 20 Y 15 master alloy, and cut it into a block with a size of about 9mm×4mm×3mm. After polishing off the oxide layer with a polishing machine, seal 7 pieces of master alloy raw materials in a quartz glass tube with a vacuum of about 10 -3 Pa. Use XG-30 audio frequency induction heating equipment to heat and melt the master alloy for 30s at an output oscillating current of 850A, and then place it in water to cool for 15s to about 20°C. Get Mg with an effective thickness dimension of 5mm 65 Cu 20 Y 15 Bulk amorphous alloy with a very small amount of CuMg in the alloy 2 Nanocrystalline phase and Cu 2 Y nanocrystalline phase.

Embodiment 3

[0036] Formulated Mg 65 Zn 25 Y 10 master alloy, and cut it into a block with a size of about 8mm×5mm×4mm. After polishing off the oxide layer with a polishing machine, seal 5 pieces of master alloy raw materials in a quartz glass tube with a vacuum of about 10 - 4Pa. Use XG-30 audio frequency induction heating equipment to heat and melt the master alloy at an output oscillation current of 650A for 50s, and then place it in liquid nitrogen to cool for 10s to about -20°C. Get Mg with an effective thickness dimension of 5mm 65 Zn 25 Y 10 Bulk amorphous alloy with a small amount of YZn nanocrystalline phase and Mg in the alloy 3 Y 2 Zn 3 Nanocrystalline phase and ZnO oxide phase.

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Abstract

The present invention discloses process of preparing lumpy Mg-base amorphous alloy. The process includes the following steps: 1. preparing Mg65TM35-xYx mother alloy, where, TM is Cu or Zn, and x is 5-15; 2. cutting the mother alloy into lumps, and vacuum sealing in quartz glass tubes; and 3. smelting the mother alloy in the quartz glass tubes and quick cooling to obtain the lumpy Mg-base amorphous alloy.

Description

technical field [0001] The invention relates to a method for preparing Mg-based bulk amorphous alloy. Background technique [0002] In recent years, research on bulk amorphous materials (blocks with dimensions greater than 1 mm in effective thickness or diameter) has become the focus of the materials field. Compared with amorphous alloys such as thin strips, filaments, and powders below two dimensions, bulk amorphous materials with an effective size of more than 1mm have a wider practical range and can be used to manufacture electronic devices, magnetic devices, and precision optics. Devices, precision mechanical structural parts, battery materials, sporting goods, biomedical implants, and military advanced weapon components, etc. [0003] Among the many systems that form bulk amorphous alloys, high specific strength light metal alloys represented by magnesium and aluminum have attracted people's attention, and the research on magnesium-based alloy systems is quite in-depth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/00C22C45/00C22F1/06B22D27/04B22D25/06
Inventor 严彪关乐丁杨沙唐人剑
Owner TONGJI UNIV