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Strontium-base bulk metallic glass and preparation method thereof

A technology of bulk metal and glass, which is applied in the field of condensed matter physics and material science, can solve the problems of large elastic limit and low elastic modulus, and achieve the effect of simple composition, simple preparation method and low overall cost

Inactive Publication Date: 2012-09-05
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The elastic modulus of bulk metallic glasses is very low, the elastic limit is very large (generally around 2%), and their strength is very high, so their ability to store elastic energy is very strong, which can be as high as 20MJ / m 3 , while commonly used crystalline alloys can only store less than 7MJ / m 3 elastic energy

Method used

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  • Strontium-base bulk metallic glass and preparation method thereof
  • Strontium-base bulk metallic glass and preparation method thereof
  • Strontium-base bulk metallic glass and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1, Sr 60 Mg 18 Zn 22 Preparation of strontium-based bulk metallic glasses

[0020] The three components of strontium with a raw material purity of 99wt% and 99.9wt% magnesium and zinc are prepared in a molar ratio of 60:18:22 and then put into a quartz tube with a sharp point, in an induction furnace with argon protection Melt and mix the above ingredients uniformly in the process to obtain the master alloy, and finally use the spray casting device of the induction furnace to blow the melt of the master alloy into the copper mold to obtain the sample. The method can be used to obtain rod-shaped strontium-based bulk metallic glass with a diameter of 3 mm or a sheet-shaped strontium-based bulk metallic glass with a thickness of 2 mm.

[0021] The Sr 60 Mg 18 Zn 22 X-ray diffraction pattern of strontium-based bulk metallic glass figure 1 As shown, there is a broad diffraction peak and no sharp crystallization peak, indicating that the sample is an amorphous ...

Embodiment 2

[0022] Example 2, Sr 60 Li 11 Mg 9 Zn 20 Preparation of strontium-based bulk metallic glasses

[0023] Strontium with a raw material purity of 99wt%, 99.9wt% zinc, and a magnesium-lithium alloy with a magnesium content of 75wt% are prepared according to the molar ratio of the four elements of strontium, lithium, magnesium, and zinc at 60:11:9:20, and then put into the belt In a pointed quartz tube, the above ingredients are melted and mixed evenly in an induction furnace with argon protection to obtain a master alloy, and finally the injection casting device of the induction furnace is used for spray casting. During the preparation of this sample, the copper mold was cooled with liquid nitrogen to obtain a larger size sample. The method can be used to obtain rod-shaped strontium-based bulk metallic glass with a diameter of 3 mm or a sheet-shaped strontium-based bulk metallic glass with a thickness of 2 mm.

[0024] The Sr 60 Li 11 Mg 9 Zn 20 X-ray diffraction pattern ...

Embodiment 3

[0025] Example 3, Sr 40 Yb 20 Mg 20 Zn 15 Cu 5 Preparation of strontium-based bulk metallic glasses.

[0026] Strontium and ytterbium with a raw material purity of 99wt%, and 99.9wt% magnesium, zinc and copper are prepared according to the molar weight of the elements at 40:20:20:15:5, and according to the preparation scheme in Example 1, you can get Rod-shaped with a diameter of 3mm or flake-shaped strontium-based bulk metallic glass with a thickness of 2mm.

[0027] The Sr 40 Yb 20 Mg 20 Zn 15 Cu 5 X-ray diffraction pattern of strontium-based bulk metallic glass figure 1 As shown, there is a broad diffraction peak and no sharp crystallization peak, indicating that the sample is an amorphous alloy. Its DSC thermal analysis results are as follows figure 2 As shown, it can be seen that it has a lower glass transition temperature (63°C) and a wider supercooled liquid phase region (42°C), and the alloy has better oxidation and corrosion resistance than other alloys. ...

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Abstract

The invention relates to a strontium-base bulk metallic glass. A chemical formula of the components of the strontium-base bulk metallic glass is as follows: Sra(YbxCal-x)bLicMgdMe, wherein a, b, c, d, e and x are atomic percents, a is not less than 30 or not more than 65, b is not less than 0 or not more than 30, c is not less than 0 or not more than 11, d is not less than 9 or not more than 25, e is not less than 15 or not more than 25, x is not less than 0 or not more than 1, and a+b+c+d+e=100; and an element M is selected from one or more of four elements, i.e. Zn, Cu, Ga and Al. The invention also relates to a preparation method of the strontium-base bulk metallic glass, comprising the following steps of: mixing the elements according to the chemical formula; melting the components at high temperature, and uniformly mixing; and blowing a melting body of a master alloy into a copper mould to obtain the strontium-base bulk metallic glass by utilizing a spray casting device. The strontium-base bulk metallic glass has great low glass transition temperature and good glass forming capacity; in addition, the invention has simple preparation method and low cost.

Description

technical field [0001] The invention belongs to the fields of condensed matter physics and material science, and in particular relates to amorphous metals and alloys, in particular to a strontium-based bulk metallic glass and a preparation method thereof. Background technique [0002] Metallic glass, also known as amorphous alloy, is a material that only appeared in the early 1960s. Before the 1990s, it was generally necessary to adopt at least 10 5 Only by cooling the alloy melt at a cooling rate above K / s can a thin ribbon-shaped metallic glass with a thickness of tens to hundreds of microns be prepared. In the past ten years, the research on metallic glasses has made great progress, and people can obtain millimeter or even centimeter-sized bulk metallic glasses in multiple alloy systems. Research has found that metallic glasses have excellent mechanical, chemical, and physical properties that their corresponding crystalline alloys do not have in many aspects, and thus b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C45/00C22C1/02
Inventor 赵昆李建福赵德乾汪卫华潘明祥
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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