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Method for preparing bulk metallic glasses by pressure induction at high temperature and high pressure

A metallic glass, high temperature and high pressure technology, applied in the field of large metallic glass prepared by pressure induction through high temperature and high pressure, can solve the problem of low viscosity coefficient of single metal elements, achieve high practical value, improve mechanical properties, and high thermal stability Effect

Inactive Publication Date: 2005-09-07
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the viscosity coefficient of monometallic elements in the molten state is very low, three orders of magnitude lower than that of amorphous alloys, and the cooling rate must reach about 10 10 -10 12 ℃ / s, the current level of science and technology is far from meeting this requirement, which brings a problem that cannot be solved at present to the traditional preparation method of obtaining pure metal bulk amorphous by rapidly cooling liquid metal

Method used

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  • Method for preparing bulk metallic glasses by pressure induction at high temperature and high pressure
  • Method for preparing bulk metallic glasses by pressure induction at high temperature and high pressure
  • Method for preparing bulk metallic glasses by pressure induction at high temperature and high pressure

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preparation example Construction

[0024] Such as figure 1 Shown, preparation method of the present invention comprises the following steps:

[0025] 1. Fill the sample:

[0026] 1) making the high-purity metal element into a cylindrical sample 5 with a diameter of 1-10 mm and a length of 1-10 mm, and polishing;

[0027] 2) The cylindrical sample 5 made of high-purity metal elements is inserted into the BN cylindrical container 8, and the BN cylindrical container 8 supports and protects the sample 5, and the sample 5 only occupies one-third of the height of the BN cylindrical container 8 ;

[0028] 3) NaCl standard pressure powder 7 is also loaded into one end of the sample in the BN cylindrical container 8, accounting for about one-fifth of the height of the BN cylindrical container 8, in order to calibrate the pressure;

[0029] 4) The welding end of the thermocouple 6 is buried in the NaCl standard pressure powder 7, and the other end is drawn out through the small hole on the BN cylindrical container 8 t...

Embodiment 1

[0038] A cylindrical high-purity Ti (99.97%) sample with a diameter of 1 mm and a length of 1 mm was pressed figure 1 Fill as shown, pressurize to 6.595GPa, and heat to 700°C to obtain Ti monoelement bulk metallic glass. See the attached XRD pattern. figure 2 shown.

Embodiment 2

[0040] With a diameter of 1 mm, a cylindrical high-purity Zr (99.97%) sample with a length of 1 mm is pressed figure 1 Fill as shown, pressurize to 6GPa, and heat to 800°C to prepare Zr single-element bulk metallic glass. The XRD pattern is shown in the attached image 3 shown.

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Abstract

The invention discloses a method for preparing massive metal glass through pressure induction with high temperature and pressure, which is in the neighborhood of the triple point of the temperature-pressure diagram of the high-purity metal elements. The free energy of each point of the metal elements in the neighborhood of the triple point are approximate equal, and the opportunity of every atomic arrangement mode are equal, so it is easy to generate the amorphous. The method comprises the following steps: bundling the columnar high-purity metal in the BN cylinder, forcing high pressure, increasing the temperature to the neighborhood of the triple point of the P-T diagram, and preparing the units massive metal glass by pressure induction. The glass has high heat stability and each point does not separate. It also provides the method for making Ti in the lower temperature and pressure through pressure induction.

Description

technical field [0001] The invention relates to the technical field of material preparation, in particular to a method for preparing bulk metallic glass through high temperature and high pressure induced by pressure. Background technique [0002] Since the discovery of a new multi-component glass alloy system in the early 1990s, bulk metallic glass material, as a new type of advanced material, has been extensively studied for its various excellent properties and industrial application prospects. One of the active research fields. This advanced material has extremely superior mechanical and magnetic properties, and some products are already on the market, such as sporting goods, electronic switches, etc. At the same time, this advanced material will have great development and application prospects in both military and civilian industries. The traditional method of preparing bulk metallic glass is the so-called copper mold method: the liquid alloy is cast in a copper mold, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C16/00C22C28/00C22F1/16
Inventor 蔣建中王莺
Owner ZHEJIANG UNIV