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A kind of nano-sic reinforced aluminum matrix composite material and preparation method thereof

A technology for strengthening aluminum-based and composite materials. It is applied in the field of aluminum-based composite materials. It can solve the problems of weakening the strengthening effect of aluminum alloys, restricting the application of nano-SiC particles, and agglomerating nanoparticles, and achieves the effect of improving hardness and high-temperature mechanical properties.

Active Publication Date: 2020-05-05
北京北方恒利科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This processing method is easy to cause the aggregation of nanoparticles, which weakens the strengthening effect on aluminum alloys and at the same time deteriorates the plasticity and toughness of aluminum alloys, which restricts the application of nano-SiC particles in reinforced aluminum matrix composites.

Method used

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  • A kind of nano-sic reinforced aluminum matrix composite material and preparation method thereof
  • A kind of nano-sic reinforced aluminum matrix composite material and preparation method thereof
  • A kind of nano-sic reinforced aluminum matrix composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add nano-SiC particles into a quartz crucible, roast at 1200°C for 2 hours to oxidize the surface, then place in 5% HF solution, pickle at 40°C for 25 minutes, and clean the acid solution and pickling on the nano-SiC particles with distilled water The product was placed in a saturated NaOH solution at 100° C. for 2 h, and rinsed with distilled water to obtain pretreated nano-SiC.

[0031] The pretreated nano-SiC and graphene were mixed at a mass ratio of 20:1, added to a 10% KH560 solution, ultrasonically treated in a water bath for 30 min, and evaporated to dryness by gas atomization to prepare a graphene-coated nano-SiC prefabricated powder.

[0032] Take cast aluminum ZL205A and heat it to 710°C to obtain an aluminum alloy melt. Cool down the aluminum alloy melt to 660°C, inject high-purity argon and keep it warm for 5 minutes. Stir the aluminum alloy melt at a speed of 400rmp, and under ultrasonic treatment, slowly add prefabricated powder accounting for 3% of the ...

Embodiment 2

[0035] Add nano-SiC particles into a quartz crucible, roast at 1150°C for 3 hours to oxidize the surface, then place in 5% HF solution, pickle at 40°C for 25 minutes, and clean the acid solution and pickling on the nano-SiC particles with distilled water The product was placed in a saturated NaOH solution at 80° C. for 3 h, and rinsed with distilled water to obtain pretreated nano-SiC.

[0036] The pretreated nano-SiC and graphene were mixed at a mass ratio of 15:1, added to a 10% KH560 solution, ultrasonically treated in a water bath for 50 min, and evaporated to dryness by gas atomization to prepare a graphene-coated nano-SiC prefabricated powder.

[0037] Take cast aluminum ZL205A and heat it to 700°C to obtain an aluminum alloy melt. Cool down the aluminum alloy melt to 640°C, inject high-purity argon gas and keep it warm for 5 minutes. Stir the aluminum alloy melt at a speed of 600rmp, and under ultrasonic treatment, slowly add prefabricated powder accounting for 5% of t...

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Abstract

The invention relates to a nano-SiC reinforced aluminum-based composite material and a preparation method thereof. After the nano-SiC particles are surface-treated, they are coupled with graphene into a KH560 aqueous solution to obtain a graphene-coated nano-SiC prefabricated powder, which is stirred by ultrasonic waves. The method is added to the aluminum alloy melt to prepare graphene-coated nano-SiC reinforced aluminum matrix composites. The strength, hardness and high-temperature mechanical properties of the nano-SiC reinforced aluminum-based composite material prepared by the invention are obviously improved.

Description

technical field [0001] The invention relates to an aluminum-based composite material, in particular to an aluminum-based composite material that strengthens the mechanical properties of an aluminum alloy by adding nano-SiC, and a preparation method of the aluminum-based composite material. Background technique [0002] Aluminum-based nanocomposites, especially nano-SiC reinforced aluminum-based composites, have good mechanical, electrical, and frictional properties. In recent years, the preparation technology of aluminum-based nanocomposites has attracted much attention. [0003] Compared with powder metallurgy, vacuum hot pressing and other preparation methods, the preparation of aluminum-based nanocomposites by casting method has the advantages of simple process, high production efficiency and low cost. However, when the composite material is manufactured by the stirring casting method, the nanoparticles are easy to agglomerate at the grain boundary during the solidificati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/10C22C21/14C22F1/057
CPCC22C1/101C22C1/1036C22C21/14C22F1/057C22C1/12C22C1/1047
Inventor 张国伟徐宏于欢董颖任霁萍
Owner 北京北方恒利科技发展有限公司
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