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High-strength high-conductivity aluminum-based composite material and preparation method thereof

An aluminum-based composite material and composite material technology, applied in the field of high-strength and high-conductivity aluminum-based composite materials and its preparation, can solve the problems of complex preparation process and achieve the effects of simple preparation process, uniform particle distribution, and low production cost

Inactive Publication Date: 2020-11-24
BEIJING HONGWEINAJIN SCIENTIFIC & TECHNOLOGICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the invention patent CN101956113B provides a method for preparing SiC particle-reinforced aluminum-based composite materials. The composite material with Al-Bi as the matrix is ​​prepared by the method of atomization powder making, high-energy ball milling + vacuum hot pressing, so that the mechanical properties of the aluminum alloy Performance and electrical properties are well matched, but there are deficiencies such as complex preparation process

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  • High-strength high-conductivity aluminum-based composite material and preparation method thereof

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Effect test

Embodiment 1

[0027] The total weight of the high-strength and high-conductivity aluminum-based composite material prepared in this example is 5000 grams, and its airgel content is designed to be 20.0% (weight percentage, the same below), the airgel component is zirconia, and the airgel particle The particle size is 10~20μm; the base alloy is 1100 aluminum alloy, the impurity content is not more than 0.1wt.%, and the rest is Al. The specific process is: mix a certain quality of airgel particles with pure aluminum alloy powder (the particle size of the aluminum powder is 200 mesh, and the impurity content is not more than 0.5wt.%) to obtain an airgel with an airgel content of 90wt.%. Aluminum precursor; add the airgel / aluminum precursor to the molten aluminum at 690°C (about 30°C higher than the alloy liquidus line), and stir mechanically for 30 minutes to make the airgel evenly distributed in the melt; The composite material melt is heated to 720°C (about 60°C higher than the alloy liquidus...

Embodiment 2

[0029] The high-strength and high-conductivity aluminum-based composite material prepared in this embodiment is 1000 grams, and its airgel content is designed to be 40.0% (weight percentage, the same below), the airgel component is silicon oxide, and the particle size of the airgel particles is 15~30μm; the base alloy is 1050 aluminum alloy, the impurity content is not more than 0.05wt.%, and the rest is Al. The specific process is: mix a certain quality of airgel particles with pure aluminum alloy powder (the particle size of the aluminum powder is 325 mesh, and the impurity content is not more than 0.1wt.%) to obtain an airgel with an airgel content of 80wt.%. Aluminum precursor; add the airgel / aluminum precursor to the molten aluminum at 720°C (about 60°C higher than the alloy liquidus line), and stir mechanically for 15 minutes to make the airgel evenly distributed in the melt; The composite material melt is heated to 680°C (about 20°C higher than the alloy liquidus line),...

Embodiment 3

[0031] The high-strength and high-conductivity aluminum-based composite material prepared in this example is 2000 grams, the airgel content is 0.1% (weight percentage, the same below), the airgel component is silicon oxide, and the particle size of the airgel particles is 5 ~10μm; the base alloy is ZL101, the impurity content does not exceed 0.2%, and the rest is Al. The specific process is: mix a certain quality of airgel particles with aluminum alloy powder (the particle size of the aluminum powder is 300 mesh, and the impurity content is not more than 0.2%) to obtain an airgel / aluminum precursor with an airgel content of 1%; Add the airgel / aluminum precursor to the molten aluminum at 595°C (about 20°C lower than the alloy liquidus), and stir for 5 minutes to make the airgel evenly distributed in the melt; heat the composite melt To 715 ℃ (about 100 ℃ higher than the alloy liquidus line), ultrasonic treatment for 5 minutes, ultrasonic power 200W, heat preservation after the ...

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Abstract

The invention relates to a high-strength high-conductivity aluminum-based composite material and a preparation method thereof, and belongs to the technical field of composite materials and preparationthereof. The mass percentage of aerogel in the composite material is 0.1-40.0%, and a matrix of the composite material is pure aluminum or an aluminum alloy. According to the high-strength high-conductivity aluminum-based composite material and the preparation method thereof, the aluminum-based composite material with uniform aerogel distribution and uniform structure is obtained by applying stirring in the liquid or semi-solid interval of the aluminum alloy and carrying out ultrasonic treatment on a composite material melt. In addition, the obtained aluminum-based composite material can be subjected to plastic forming processing such as extrusion, rolling and drawing, and the deformed aluminum-based composite material with more excellent mechanical properties is further obtained. The high-strength high-conductivity aluminum-based composite material and the preparation method thereof achieve the technical effect of uniform and effective dispersion of submicron and micron-sized aerogelparticles in the aluminum alloy matrix, have the advantages of simple process, low production cost and the like, and are suitable for large-scale mass production of high-strength and high-conductivity aluminum-based composite materials. The obtained aluminum-based composite material has the advantages of being low in density, excellent in mechanical property, high in heat conduction and conductivity and the like, and has wide application prospects in the fields of high-performance aluminum structural members and automobiles, aerospace, power electronics and the like which have special requirements for the heat conduction and conductivity of the aluminum material.

Description

technical field [0001] The invention relates to a high-strength and high-conductivity aluminum-based composite material and a preparation method thereof, and belongs to the technical field of metal-based composite materials and its preparation. Background technique [0002] Industrial pure aluminum has good electrical and thermal conductivity, but its strength and hardness are low, which severely limits its application range. Adding copper, magnesium, zinc, manganese, silicon and other elements to pure aluminum can effectively improve the strength, hardness and other properties of the alloy, and obtain various grades of aluminum alloys, but at the same time it also significantly reduces the electrical and thermal conductivity of the aluminum alloy Performance, for example, the electrical conductivity of the 7-series high-strength aluminum alloy is only 30-40% IACS, which is only about 50% of that of pure aluminum. [0003] With the rapid development of high-tech industrie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C32/00C22C1/10C22C1/02
CPCC22C1/1036C22C21/00C22C32/0036
Inventor 李光武王朝辉王强松杨书瑜
Owner BEIJING HONGWEINAJIN SCIENTIFIC & TECHNOLOGICAL CO LTD