Preparation method of high-strength and high-toughness graphene reinforced aluminum matrix composite

A composite material and a technology for strengthening aluminum matrix, which is applied in the field of preparation of aluminum matrix composite materials, can solve the problems of strength-toughness inversion, uneven dispersion of graphene, etc., and achieves enhanced interface bonding, good economic benefits, and increased crack propagation paths. Effect

Active Publication Date: 2020-11-13
HARBIN INST OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem of uneven dispersion of graphene in the aluminum matrix during the preparation of aluminum-based composite materials and the existence of strength-toughness inversion in the prepared composite material, the present invention proposes a preparation method for high-strength and tough graphene-reinforced aluminum-based composite materials

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  • Preparation method of high-strength and high-toughness graphene reinforced aluminum matrix composite

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Experimental program
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specific Embodiment approach 1

[0027] Specific embodiment one: the preparation method of high-strength and tough graphene-reinforced aluminum-based composite material in this embodiment is carried out according to the following steps:

[0028] 1. Weighing

[0029] Weighing 0.3% to 5% of graphene microflakes and 95% to 99.7% of aluminum metal powder by mass fraction;

[0030] 2. Pre-dispersion of graphene microflakes

[0031] Ultrasonic disperse the graphene microflakes weighed in step 1 in distilled water for 90 to 120 minutes to obtain an aqueous graphene microflake solution; add the aluminum metal powder weighed in step 1 to the graphene microflake aqueous solution, and stir at room temperature for 60 to 100 min. 90min, then carry out suction filtration, dry after suction filtration, put the powder obtained after drying into a ball mill tank and carry out ball milling to obtain a mixed powder;

[0032] 3. Using the mixed powder obtained in step 2 as a raw material, a graphene microchip-reinforced alumin...

specific Embodiment approach 2

[0046] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the average sheet diameter of the graphene microsheets described in step one is 2 μm to 5 μm, and the average thickness is 5 to 10 nm; the average particle diameter of the aluminum metal powder is 10-20μm.

specific Embodiment approach 3

[0047] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the aluminum metal powder in step 1 is made of aluminum alloy; the aluminum alloy is Al-Si-Cu-Mg alloy, Al-Si- One of Mg-Be alloy, Al-Mg alloy, Al-Cu-Mg alloy, Al-Cu-Mn-Mg alloy, Al-Mn-Si-Cu alloy; in the Al-Si-Cu-Mg alloy Si is 4.5-6.5%, Cu is 1.6-2.2%, Mg is 0.45-0.65%; Mg in Al-Mg alloy is 3.5-5%; Cu in Al-Cu-Mg alloy is 0.5-5.8%, Mg is 0.3% ~3.5%; Cu in Al-Cu-Mn-Mg alloy is 3.8~4.9%, Mn is 0.3~9%, Mg is 1.5~1.8%; Si in Al-Si-Mg-Be alloy is 7.5~8.0%, Mg is 0.4-0.5%, Ti is 0.15-0.25%, Be is 0.15-0.20%; in Al-Mn-Si-Cu alloy, Mn is 4-5.2%, Cu is 0.6-0.8%, and Fe is 0.1-1.0%. , Si is 7.0 to 12%, and Ti is 0.1 to 1.0%.

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Abstract

The invention provides a preparation method of a high-strength and high-toughness graphene reinforced aluminum matrix composite, and relates to a preparation method of an aluminum matrix composite. The preparation method aims to solve the problems that graphene is not uniformly dispersed in an aluminum matrix during preparation of the aluminum matrix composite, and the strength and toughness of the prepared composite are inverted. The preparation method comprises the steps that graphene micro-sheets and aluminum metal powder are used for preparing the graphene micro-sheet reinforced aluminum matrix composite with the thickness being 2-2.5 times of the thickness of a product, the graphene micro-sheet reinforced aluminum matrix composite and an aluminum alloy plate are stacked for accumulative composite rolling deformation treatment, and heat treatment is carried out. According to the preparation method, the multi-pass accumulative composite rolling technology is utilized for enabling sheet layers of the graphene micro-sheets to be gradually opened, material grains are greatly refined, a composite interface is formed, the toughness of the obtained composite is not reduced while the strength of the composite is increased, and the problem that the strength and toughness of the graphene reinforced aluminum matrix composite are inverted is solved. The preparation method is suitable for preparing the graphene reinforced aluminum matrix composite.

Description

Technical field: [0001] The invention relates to a preparation method of an aluminum-based composite material. Background technique: [0002] Aluminum matrix composites have drawn much attention from the aerospace and automotive industries due to their low density and high strength properties. Previous studies mostly focused on micro-reinforcements, but with the development of nanotechnology, a number of nano-reinforcement materials with better performance have emerged, such as graphene (Graphene), carbon nanotubes (CNTs), etc. Among them, graphene has a two-dimensional crystal structure with a thickness of one atomic layer and is the thinnest material known so far. Its excellent electrical, optical, thermal, and mechanical properties are considered to be ideal reinforcements for aluminum matrix composites. Its tensile strength and elastic modulus reach 125GPa and 1100GPa, respectively, and the electron / hole mobility at room temperature reaches 1.5×10 4 cm 2 ·V -1 ·s -...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C1/10C22C21/00C22F1/04
CPCC22C1/05C22C21/00C22C32/0084C22F1/04
Inventor 邵溥真谢伟梅勇张强杨文澍武高辉姜龙涛陈国钦康鹏超修子扬乔菁周畅芶华松
Owner HARBIN INST OF TECH
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