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Composite foaming agent particles and preparation method thereof, and preparation method of aluminum foam

A technology of composite foaming agent and composite particles, which is applied in metal processing equipment, transportation and packaging, coating, etc., to achieve good reproducibility, reduce the requirements of melting temperature matching, and stable quality

Active Publication Date: 2019-07-09
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, in order to solve the problem of uniform foaming, it is necessary to provide a composite foaming agent particle and its preparation method, and the preparation method of aluminum foam

Method used

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  • Composite foaming agent particles and preparation method thereof, and preparation method of aluminum foam
  • Composite foaming agent particles and preparation method thereof, and preparation method of aluminum foam
  • Composite foaming agent particles and preparation method thereof, and preparation method of aluminum foam

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preparation example Construction

[0036] see figure 1 , the invention provides a kind of preparation method of composite blowing agent particle, comprising:

[0037] S100, uniformly mixing titanium hydride particles and metal particles to obtain mixed particles, the melting point of the metal particles is lower than the decomposition temperature of titanium hydride;

[0038] S200, applying pressure to the mixed particles, so that the metal particles and titanium hydride particles are combined to form a block composite;

[0039] S300, performing mechanical crushing on the bulk composite to obtain composite particles; and

[0040] S400, performing particle size screening on the composite particles, and screening the composite particles in which the metal phase coats the titanium hydride phase.

[0041] Using physical coating technology to mix, briquetting, crushing and screening titanium hydride particles and metal particles to obtain composite foaming agent particles with low melting point metal phase coating...

Embodiment 1

[0059] The preparation of embodiment 1 composite blowing agent particle

[0060] S100, uniformly mixing titanium hydride particles and metal particles. Among them, the metal particles are tin powder with a particle size of 500 mesh. The particle size of the titanium hydride particles was 300 mesh. The mass ratio of titanium hydride particles to tin powder is 1:8. The mixing operation was carried out on a three-dimensional mixer for 2 hours, and the frequency of the mixer was set at 40 Hz.

[0061] S200, after mixing, weigh 15g of the mixture and pour it into a cylindrical mold with an inner cavity of 30mm for uniaxial briquetting. After keeping it at 450MPa for 5min, a round block with a thickness of 3mm and a diameter of 30mm is obtained.

[0062] S300: For the pressed round sample, it is mechanically crushed by breaking, crushing, etc. to obtain composite particles.

[0063] S400, screen the particles after primary crushing, and screen out particles with a particle size ...

Embodiment 2

[0064] The preparation of embodiment 2 aluminum foam

[0065] The composite blowing agent particle that adopts embodiment 1 preparation prepares aluminum foam, after obtaining composite blowing agent particle, carry out following operations:

[0066] S500, mixing the aluminum powder with the obtained composite foaming agent particles, and pressing to obtain a foaming precursor.

[0067] S600, heating the foaming precursor to make the composite foaming agent particles foam. As the heating temperature increases, the precursor melts gradually, and finally an aluminum melt with a cellular structure is obtained.

[0068] S700, cooling the aluminum melt to obtain foamed aluminum.

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Abstract

The invention provides a composite foaming agent particle, which includes a titanium hydride phase and a metal phase, the metal phase covers the titanium hydride phase, and the melting point of the metal phase is lower than the decomposition temperature of the titanium hydride. The present invention also provides a method for preparing composite blowing agent particles, comprising mixing titanium hydride particles and metal particles to obtain mixed particles, the melting point of the metal particles being lower than the decomposition temperature of the titanium hydride; Apply pressure to the particles to make the metal particles and the titanium hydride particles composite to form a block composite; mechanically crush the block composite to obtain composite particles; and perform particle size screening on the composite particles to screen out The metal phase coats the composite particles of the titanium hydride phase. The invention also provides a preparation method of foamed aluminum.

Description

technical field [0001] The invention relates to the field of porous foamed metal materials, in particular to composite foaming agent particles and a preparation method thereof, and a preparation method of foamed aluminum. Background technique [0002] Closed-cell aluminum foam is a lightweight material that integrates structure and function. It has excellent mechanical and physical properties such as energy absorption, shock absorption, cushioning, sound insulation and sound absorption, heat insulation, and electromagnetic shielding. Weight, structural load-bearing and functional integration, micro-vibration suppression and other requirements, to meet the future demand for functional materials in aerospace, automobile manufacturing, rail transit and other fields. [0003] Powder metallurgy is a relatively well-known process for preparing foamed aluminum. The powder metallurgy method uses a metal alloy as the foaming matrix material to make the foamed aluminum have relativel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/11C22C1/08B22F1/02B22F9/04
CPCB22F3/1125B22F3/1134B22F9/04B22F1/17
Inventor 刘源丁祥陈祥张华伟
Owner TSINGHUA UNIV
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