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A kind of preparation method of nano ceramic particle reinforced aluminum matrix composite material

A technology of nano-ceramic particles and composite materials, applied in the field of preparation of aluminum-based composite materials, can solve the problems of complex process, limited molding, low content, etc., and achieve the effect of low process cost, convenient operation and uniform distribution

Active Publication Date: 2017-01-18
黄冈市蕲春县新天地瓷业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large number of studies have found that the wettability of nano-ceramic particles and aluminum alloy melt is poor, and the state in the melt is unstable
However, the preparation of nanocomposites through traditional processes has problems such as easy agglomeration of nanoparticles, low content, complex process, and limited molding, which greatly affects the potential for improving the performance of aluminum-based nanocomposites.

Method used

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  • A kind of preparation method of nano ceramic particle reinforced aluminum matrix composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] First, ball mill the nano-aluminum nitride particles and aluminum powder for 60 hours, in which the mass ratio of nanoparticles and aluminum powder is 1:1, and the ball milling speed is 70rpm; put the mixed powder into the crucible to heat, and the temperature is controlled at 660°C; air cooling , crushing, and sieving, wherein the mesh size is 850 μm; put the A356 aluminum alloy into the crucible to heat and melt, and at a temperature of 750 ° C, the amount of nano-ceramic particles added is 1wt.% of the aluminum alloy melt Add the above-mentioned sieved powder to the aluminum alloy melt for 10 minutes, introduce high-energy ultrasound into the aluminum alloy melt during the addition process, ultrasonic frequency 20KHz, power 1KW, and then continue ultrasonic treatment for 5 minutes; After the melt is cooled to 700°C, it is ultrasonically treated for 120s, with an ultrasonic frequency of 20KHz and a power of 1KW; it is poured into a metal model that has been preheated a...

Embodiment 2

[0014] Firstly, the nano-alumina particles and aluminum powder were ball milled for 50 hours, wherein the mass ratio of nanoparticles and aluminum powder was 2:3, and the ball milling speed was 60 rpm; the mixed powder was heated in a crucible, and the temperature was controlled at 670°C; air cooling, Crush and sieve, where the mesh size is 1000μm; put the 7075 aluminum alloy into the crucible to heat and melt, at a temperature of 700°C, the amount of nano-ceramic particles added is 2wt.% of the aluminum alloy melt , adding the above sieved powder into the aluminum alloy melt for 10 minutes, introducing high-energy ultrasound into the aluminum alloy melt during the addition process, ultrasonic frequency 20KHz, power 1KW, and then continuing ultrasonic treatment for 10 minutes; After the temperature of the body is lowered to 700°C, it is ultrasonically treated for 120s, with an ultrasonic frequency of 20KHz and a power of 1KW; it is poured into a metal model that has been prehea...

Embodiment 3

[0016] First, the nano-magnesia particles and aluminum powder were ball milled for 55 hours, wherein the mass ratio of nanoparticles and aluminum powder was 2:3, and the ball milling speed was 70rpm; the mixed powder was heated in a crucible, and the temperature was controlled at 660°C; air cooling, Crush and sieve, with a mesh size of 850 μm; put 6061 aluminum alloy into a crucible to heat and melt, at a temperature of 750°C, the amount of nano-ceramic particles added is 3wt.% of the aluminum alloy melt , adding the above sieved powder into the aluminum alloy melt for 10 minutes, introducing high-energy ultrasound into the aluminum alloy melt during the addition process, ultrasonic frequency 20KHz, power 3KW, and then continuing ultrasonic treatment for 5 minutes; After the temperature of the body is lowered to 700°C, it is ultrasonically treated for 60s, with an ultrasonic frequency of 20KHz and a power of 1.5KW; it is poured into a metal model that has been preheated at 400°...

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Abstract

The invention relates to a method for preparing nano-ceramic particle reinforced aluminum-based composite material. The method comprises the following steps of firstly mixing nano-ceramic particles and aluminum powder at a mass ratio of (1: 1)-(2: 3) and carrying out ball milling at a speed of 60-70rpm for 50-60 hours to obtain mixed powder; putting the mixed powder into a crucible and heating to 660-670 DEG C; air-cooling, crushing and sieving; placing an aluminum alloy into a crucible for melting to obtain an aluminum alloy melt, at 700-750 DEG C, adding the mixed powder into the aluminum alloy melt within 5-10 minutes, wherein the addition of the nano-ceramic particles accounts for 1-4wt. % of the aluminum alloy melt, carrying out high-energy ultrasound treatment at frequency of 20KHz and power of 1-3KW and further carrying out ultrasound treatment for 5-10 minutes; cooling the melt to 660-700 DEG C, carrying out ultrasound treatment for 60-120 seconds at frequency of 20KHz and power of 1-2KW; and pouring the melt into a metal mold of 400-450 DEG C. The aluminum-based composite material obtained by the method has fine grains in the microstructure, the distribution of the nano-ceramic particles is uniform and no agglomeration phenomenon is caused. The preparation method is low in process cost, and is simple, safe and reliable and is convenient to operate.

Description

technical field [0001] The invention belongs to the field of metal material preparation, and in particular relates to a preparation method of an aluminum-based composite material. Background technique [0002] Particle-reinforced aluminum matrix composites have many advantages such as specific strength, high specific stiffness, high wear resistance, and high vibration damping. Ceramic particles are an ideal reinforcing phase because of their good physical, chemical, mechanical and thermal properties, and have attracted the attention of many scholars. Micron particles can improve the yield strength and ultimate compressive strength of the matrix, but make the ductility of the matrix worse. Nanoparticles can significantly improve the elastic modulus, yield strength, wear resistance and high temperature creep of the matrix while maintaining a low content, so they are gradually being valued. A large number of studies have found that the wettability of nano-ceramic particles an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C21/00
Inventor 闫洪陈小会
Owner 黄冈市蕲春县新天地瓷业有限公司