Rapidly solidified aluminum matrix composite enhanced by SiCp particles, and preparation method thereof

An aluminum-based composite material and particle reinforcement technology, applied in the field of metal materials and composite materials, can solve the problems of low strength, large grain size of composite materials, poor wear resistance, etc., and achieve high strength characteristics, high wear resistance, and good mechanical properties. , combined with good effect

Active Publication Date: 2013-08-28
铜川华铸精密科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a SiC p Particle-reinforced rapid solidification aluminum matrix composites, which solve the problems of low strength and poor wear resistance of existing materials
[0006] Another object of the present invention is to provide the above SiC p A method for preparing particle-reinforced rapid-solidification aluminum-based composite materials, which solves the problem of large grains in the composite materials prepared by existing methods

Method used

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  • Rapidly solidified aluminum matrix composite enhanced by SiCp particles, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Step 1, weigh the following components according to the volume ratio: SiC with a particle size of 0.6 μm p 5% particles, and the rest is rapidly solidified ZL102 alloy powder with a particle size of 1.5 μm;

[0040] Step 2, the SiC p The particles were fired at 1100°C in an oxidizing atmosphere for 10h to make SiC p The particle surface is oxidized to form a layer of SiO 2 film, and then use a 5% HF solution to oxidize SiC at high temperature p Particles are cleaned, most preferably with deionized water and dried at 120°C;

[0041] Step 3, the SiC pretreated in step 2 p The particles and the rapidly solidified ZL102 alloy powder were dry-mixed in a ceramic ball mill tank under the protection of argon atmosphere for 5 hours, and the speed of the high-energy ball mill was 200r / min; finally, the high-energy mixed powder was obtained by drying at 120°C;

[0042] Step 4, put the high-energy mixed powder obtained in step 3 in a reciprocating extrusion device for pre-comp...

Embodiment 2

[0044] Step 1, weigh the following components according to the volume ratio: SiC with a particle size of 0.3 μm p 10% of particles, the rest is rapidly solidified ZL301 alloy powder with a particle size of 2 μm;

[0045] Step 2, the SiC p The particles were fired at 1100°C in an oxidizing atmosphere for 10h to make SiC p The particle surface is oxidized to form a layer of SiO 2 film, and then use a 5% HF solution to oxidize SiC at high temperature p Particles are cleaned, most preferably with deionized water and dried at 120°C;

[0046] Step 3, the SiC pretreated in step 2 p Granules and rapidly solidified ZL301 alloy powder were wet-mixed in a ceramic ball mill tank using a mixture of absolute ethanol and 2% polyethylene glycol as a wet mix for 1 hour, the speed of the high-energy ball mill was 300r / min, and the amount of wet mix added was SiC p 20% of the total volume of particles and rapidly solidified ZL301 alloy powder, and finally dried at 60°C to obtain high-energ...

Embodiment 3

[0049] Step 1, weigh the following components according to the volume ratio: SiC with a particle size of 0.6 μm p 5% particles, and the rest is rapidly solidified ZL201 alloy powder with a particle size of 2 μm;

[0050] Step 2, the SiC p The particles were fired at 1100°C in an oxidizing atmosphere for 10h to make SiC p The particle surface is oxidized to form a layer of SiO 2 film, and then use a HF solution with a concentration of 20% to oxidize SiC at high temperature p Particles are cleaned, most preferably with deionized water and dried at 120°C;

[0051] Step 3, the SiC pretreated in step 2 p Granules and rapidly solidified ZL201 alloy powder were wet-mixed for 5 hours using a mixture of absolute ethanol and 2% polyethylene glycol as a wet mixture in a ceramic ball mill tank. The speed of the high-energy ball mill was 250r / min. SiC p 30% of the total volume of particles and rapidly solidified ZL201 alloy powder, and finally dried at 60°C to obtain high-energy mixe...

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Abstract

The invention discloses a rapidly solidified aluminum matrix composite enhanced by SiCp particles. The rapidly solidified aluminum matrix composite is prepared from the following components by volume percent: 2.5-25% of SiCp particles, and the balance of rapidly solidified aluminum alloy or pure aluminum powder. The preparation method comprises the following steps of: cleaning and baking the SiCp particles by deionized water after high-temperature oxidation and pickling; then drying the rapidly solidified aluminum alloy or pure aluminum powder to obtain high-energy mixed powder after mixing the powder; and finally, orderly carrying out repeated extrusion and common positive extrusion on the high-energy mixed powder to obtain the rapidly solidified aluminum matrix composite enhanced by the SiCp particles. The rapidly solidified aluminum matrix composite enhanced by the SiCp particles has the advantages of high strength characteristics and high wearability. By adopting the preparation method disclosed by the invention, the rapidly solidified aluminum matrix composite enhanced by the SiCp particles prepared in manners of carrying out pretreatment and high-energy mixing on the SiCp particles and then carrying out repeated severe plastic deformation is even in distribution of SiCp particles, good in combination with a matrix interface, and isotropous in aluminum matrix composite.

Description

technical field [0001] The invention belongs to the technical field of metal materials and composite materials, and relates to a SiC p Particle reinforced rapid solidification aluminum matrix composite material, the invention also relates to SiC p A method for preparing particle-reinforced rapid-solidification aluminum matrix composites. Background technique [0002] With the development of modern science and technology, especially the development of aerospace, automobile, energy, and transportation technologies, higher and higher requirements are placed on the performance of materials, which require materials to have excellent comprehensive properties such as low density, high strength, High plasticity, high toughness, high wear resistance, high damping performance and good fatigue resistance, etc., and it is required to be able to serve in extreme environmental conditions such as high temperature, high pressure, strong corrosion and radiation. Traditional single material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/05
Inventor 徐春杰邓新科代盼赵敬忠张忠明
Owner 铜川华铸精密科技有限公司
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