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Preparation method for composite material based on porous aluminum or aluminum alloy

A technology of aluminum alloy matrix and composite materials, applied in the field of porous metal materials, can solve the problems of easy oxidation, difficulty in obtaining porous aluminum or aluminum alloy matrix composite materials, etc., and achieve the effect of ensuring metallurgical bonding

Inactive Publication Date: 2014-10-29
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Due to the high activity of aluminum or aluminum alloy, its surface is easy to oxidize, and the finer the aluminum or aluminum alloy particles are, the more serious the oxidation is. It is difficult to obtain metallurgically bonded porous aluminum or aluminum alloy matrix composite materials by conventional atmosphere sintering or vacuum sintering.

Method used

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  • Preparation method for composite material based on porous aluminum or aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Preparation of mixed powder blank: 1060 industrial pure aluminum powder with a particle size of 10-25 μm, diamond particles with a particle size of 0.1-1.5 μm and NaCl particles with a particle size of 178-297 μm are used as raw materials for batching, among which NaCl particles, The volume percentages of diamond particles and 1060 industrial pure aluminum powder in the mixed powder were 30%, 7% and 63% respectively, and 1060 industrial pure aluminum powder, diamond composite particles and NaCl particles were mixed in the mixer for 3 hours to obtain a uniform Mixed powder, this mixed powder is pressed under the pressure of 500MPa to obtain mixed powder base;

[0033] (2) Hot isostatic pressing of the mixed powder compact: heat the mixed powder compact prepared in step (1) to 620°C for hot isostatic pressing (hot isostatic pressing pressure 100 MPa, hot isostatic pressing time 2 hours), hot After isostatic pressing, it is cooled with the furnace to obtain a hot isost...

Embodiment 2

[0036] (1) Preparation of mixed powder base: 3004 aluminum alloy powder with a particle size of 25-37 μm, TiB2 particles with a particle size of 0.1-3.4 μm and NaCl particles with a particle size of 250-350 μm are used as raw materials for batching. Among them, NaCl particles, TiB2 The volume percentages of particles and 3004 aluminum alloy powder in the mixed powder are 50%, 10% and 40% respectively, 3004 aluminum alloy powder, TiB 2 Composite particles and NaCl particles were mixed in a mixer for 2 hours to obtain a uniform mixed powder, and the mixed powder was pressed under a pressure of 400MPa to obtain a mixed powder compact;

[0037] (2) Hot isostatic pressing of the mixed powder compact: heat the mixed powder compact prepared in step (1) to 560°C for hot isostatic pressing (hot isostatic pressing pressure 150 MPa, hot isostatic pressing time 1 hour), hot After isostatic pressing, it is cooled with the furnace to obtain a hot isostatic compact;

[0038] (3) Post-treatm...

Embodiment 3

[0040](1) Preparation of mixed powder blank: ZL111 aluminum alloy powder with a particle size of 37-53 μm, SiC particles with a particle size of 0.1-5 μm and NaCl particles with a particle size of 420-590 μm are used as raw materials, among which NaCl particles, SiC particles, ZL101 The volume percentages of aluminum alloy powder in the mixed powder are 70%, 9% and 21% respectively. The ZL111 aluminum alloy powder, SiC composite particles and NaCl particles are mixed in the mixer for 1 hour to obtain a uniform mixed powder. The powder is compressed under a pressure of 100MPa to obtain a mixed powder compact;

[0041] (2) Hot isostatic pressing of the mixed powder compact: heat the mixed powder compact prepared in step (1) to 550°C for hot isostatic pressing (hot isostatic pressing pressure 180MPa, hot isostatic pressing time 0.5 hours), After hot isostatic pressing, the hot isostatic compact is obtained by cooling with the furnace;

[0042] (3) Post-treatment of the hot isost...

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Abstract

The invention relates to a preparation method for a composite material based on porous aluminum or aluminum alloy, and belongs to the field of porous metal materials. Aluminum or aluminum alloy powder, composite particles and pore-forming agent NaCl particles are adopted as raw materials, the powder is mixed and then pressed to form a blank, the blank is pressed and heated to the aluminum melting point or the temperature 20-50 DEG C below the temperature of the aluminum alloy solidus curve for hot isostatic pressing, metallurgical bonding between aluminum or aluminum alloy powder is achieved, after the hot isostatic pressing blank is cooled, NaCl particles in the hot isostatic pressing blank are dissolved and removed with water, and the composite material based on the porous aluminum or aluminum alloy is obtained.

Description

technical field [0001] The invention relates to a method for preparing a porous aluminum or aluminum alloy matrix composite material, belonging to the field of porous metal materials. Background technique [0002] Porous aluminum or aluminum alloy with a through-hole structure has the characteristics of low density, high specific strength, energy absorption, sound absorption and vibration reduction, permeation and circulation, and low thermal conductivity. , fire retardant and other fields have a broad application market. In the case of a certain pore structure, the composite of porous aluminum alloy matrix material can further expand its performance range, such as strength, elastic modulus, damping, thermal stability, thermal conductivity, etc., making porous aluminum or aluminum alloy matrix composite The performance of the material in the above application fields is superior. [0003] At present, there are mainly two known mainstream methods for preparing porous aluminu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/14B22F3/24
Inventor 左孝青陆建生罗晓旭
Owner KUNMING UNIV OF SCI & TECH
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