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A method and device for preparing metallic glass particles

A metal glass and particle technology, applied in the field of metal glass preparation, can solve the problems of low cooling rate, uneven particle size distribution, inconsistent thermal history, etc., and achieve the effect of consistent thermal history, expanded particle size range, and easy realization.

Active Publication Date: 2016-09-07
GAOYOU INST CO LTD DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a method and device for preparing metallic glass particles. The metallic glass particles are prepared by the pulse small hole spraying method. Due to the rapid solidification without a container, particles with uniform particle size and high sphericity are obtained, and The particle size is controllable and the preparation efficiency is high, which solves the problems of low cooling rate, uneven particle size distribution and inconsistent thermal history in the existing preparation process of metallic glass particles

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  • A method and device for preparing metallic glass particles
  • A method and device for preparing metallic glass particles
  • A method and device for preparing metallic glass particles

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Effect test

Embodiment 1

[0035] Such as figure 1 and 2A device used in a method for preparing metallic glass particles is shown, the device includes a vacuum system, a droplet ejection system, an image acquisition system and a particle collection device, the vacuum system includes a vacuum chamber 7, and the particle collection device is installed on The bottom of the vacuum chamber, the droplet injection system is installed on the top of the vacuum chamber, and is located directly above the particle collection device, the image acquisition system is connected to the vacuum chamber of the vacuum system, and the baffle 11 is movably installed on the droplet through the bracket 12 Between the injection system and the particle collection device, the purpose of setting the baffle plate is to remove particles that do not conform to the size at the beginning or form an oxide layer on the surface, so as to improve the yield of the product. Particles of different sizes are not mixed together.

[0036] The v...

Embodiment 2

[0051] Embodiment 2 is the same as the device and the preparation method of metallic glass particles in embodiment 1, and the different relevant parameters of the device and method of this embodiment are as follows:

[0052] (1) The small holes of the device are two holes distributed on a circular arc with the center of the ceramic sheet as the center, and the angle between the two holes is 180°, the aperture range of the small holes is 0.020mm, and the speed of preparing particles is 0.020 mm. 2 times that of Example 1.

[0053] (2) The vibration frequency of piezoelectric ceramics is 600Hz; the crucible and ceramic sheet are made of Al 2 o 3 ; The transmission rod is made of Al 2 o 3 .

[0054] (3) Step (1) charging: adding the metal to be prepared is Cu-Hf alloy.

[0055] (4) Step (2) evacuating: using a mechanical pump and a diffusion pump to evacuate the crucible and the vacuum chamber to 0.0009Pa.

[0056] (5) Step (3) molten metal: after the Cu-Hf alloy is complet...

Embodiment 3

[0059] Embodiment 3 is the same as the device and the preparation method of metallic glass particles in embodiment 1, and the different relevant parameters of the device and method of this embodiment are as follows:

[0060] (1) The small holes of the device are 4 holes distributed on a circular arc centered on the center of the ceramic sheet, and the angle between each hole is 90°, the small hole aperture range is 0.600mm, and the speed of preparing particles is 4 times that of Example 1.

[0061] (2) The vibration frequency of piezoelectric ceramics is 1200Hz; the making material of crucible 3 and ceramic sheet 9 is ZrO 2 , the transmission rod 2 is made of ZrO 2 .

[0062] (3) Step (1) charging: the metal to be prepared is Zr-Cu-Al alloy.

[0063] (4) Step (2) evacuating: using a mechanical pump and a diffusion pump to evacuate the crucible and the vacuum chamber to 0.0008Pa.

[0064] (5) Step (3) molten metal: the Zr-Cu-Al alloy is completely melted and then kept for 2...

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Abstract

A method and device for preparing metallic glass particles belong to the technical field of metallic glass preparation. In this method, under vacuum conditions, the metal melt in the molten state is at a stable differential pressure of 0-50KPa, and at the same time, a certain pulse signal is applied to the piezoelectric ceramics to act on the metal melt, so that tiny droplets are ejected from the small hole at the bottom of the crucible without a container. Rapid cooling and solidification form spherical metallic glass particles. The device includes a vacuum chamber, the particle collection device is installed at the bottom of the vacuum chamber, the droplet ejection system is installed on the top of the vacuum chamber, and is located directly above the particle collection device, and the image acquisition system is connected to the vacuum chamber of the vacuum system . The present invention prepares metallic glass particles by means of the pulse small-hole spraying method. Due to rapid solidification without a container, particles with uniform particle size and high sphericity are obtained, and the particle size is controllable and the preparation efficiency is high. Problems such as low cooling rate of the particle process, uneven particle size distribution, and inconsistent thermal history.

Description

technical field [0001] The invention belongs to the technical field of metallic glass preparation, and in particular relates to a method for preparing metallic glass particles, and also relates to a preparation device thereof. Background technique [0002] When some liquid metal alloys are cooled very fast, the atoms inside the metal have no time to "straighten out" their positions, and they are still in a disordered state and immediately solidify into an amorphous metal. These amorphous metals have some glass-like structural features, so they are called "metallic glasses". The main advantage of metallic glass is that it has high strength, hardness, elasticity, and rigidity. Its strength and hardness are higher than those of existing general crystalline metals. It has wide application potential in the fields of machinery, communication, aerospace, medicine and so on. [0003] The demand for small parts with high precision, complex shape and structure, excellent mechanical ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/08
Inventor 董伟许富民赵丽李颖
Owner GAOYOU INST CO LTD DALIAN UNIV OF TECH
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