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A kind of preparation method of flexible bulk metallic glass

A technology of metallic glass and bulk metal, which is applied in the field of preparation of flexible bulk metallic glass, can solve problems such as hindering the expansion of shear bands, and achieve the effect of improving compression plasticity

Active Publication Date: 2019-12-20
CHINA UNIV OF MINING & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a preparation method of flexible bulk metallic glass, design and introduce gradient residual stress, change the stress distribution under loading conditions, hinder the expansion of shear band, and overcome the brittleness of existing bulk metallic glass Weakness of random bending and deformation at room temperature

Method used

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  • A kind of preparation method of flexible bulk metallic glass
  • A kind of preparation method of flexible bulk metallic glass
  • A kind of preparation method of flexible bulk metallic glass

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Embodiment

[0025] The preparation method of the flexible iron-based bulk metallic glass sample of the present embodiment comprises the following steps:

[0026] (1) Preparation of master alloy ingot: according to atomic percentage, the chemical formula of master alloy ingot is Fe 80-x (Co, Ni, Cr, Mo) x (P,B) y (C, Si) z Nb m , wherein, y+z+m=20; the raw materials for preparing the above master alloy ingot are: Fe particles (purity 99.98%), Ni particles (purity 99.7%), Fe 3 P powder (purity 99.9%), Cr powder (purity 99.9%), Co powder (purity 99.9%), Mo powder (purity 99.9%), Nb particles (purity 99.9%), B particles (purity 99.9%), Si powder (purity 99.99%) and graphite powder (purity 99.9995%). According to the set alloy composition, the precision is 10 in proportion -5 After weighing each raw material on an electronic balance of g, put each raw material into a pre-washed and dried quartz glass tube, connect the quartz glass tube to the experimental device to evacuate, and the vac...

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Abstract

The invention discloses a method for preparing a flexible bulk metallic glass, comprising the following steps: step 1, putting each raw material into a dry smelting device according to the alloy composition of the bulk metallic glass; in the presence of a protective gas, Prepare master alloy ingots after repeated smelting of each raw material; step 2, purify the master alloy ingot obtained in step 1 by using oxides as a purification medium; step 3, heat the quartz to a molten state to prepare a quartz mold; step 4 After sealing the quartz mold, place the purified master alloy ingot in the quartz mold, heat the master alloy ingot to melt in the presence of protective gas, press the molten metal into the quartz mold by air pressure, and make The molten metal is homogeneous and filled with the quartz mold, then taken out and immediately quenched in cold water, resulting in a flexible bulk metallic glass. The invention greatly improves the compressive plasticity of the bulk metallic glass, so that the metallic glass can flexibly bend without breaking at room temperature.

Description

technical field [0001] The invention relates to a method for preparing a flexible bulk metallic glass. Background technique [0002] With the development of flexible electronic devices, the requirements for the comprehensive performance of materials are getting higher and higher. Not only are materials required to have high strength, wear resistance and corrosion resistance, but they are also required to be bent at room temperature without breaking, so that flexible devices can be deformed at will. requirements. Most traditional materials are not up to the task. Metallic glass is a new type of metastable amorphous alloy material whose atomic arrangement does not have a three-dimensional periodic structure, but still shows a certain order in the range of several atomic distances. This type of glass is different from the traditional oxide glass. There are metal bonds between atoms and a certain degree of electrical conductivity; the unique structure makes it have many excell...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/03C22C33/06
CPCC22C1/03C22C33/003C22C33/06C22C1/11
Inventor 刘海顺杨卫明陈哲张月莫金勇王明梓
Owner CHINA UNIV OF MINING & TECH
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