Preparation method for dual model-structure graphene-reinforced aluminum matrix composite

A technology for strengthening aluminum-based and composite materials, applied in graphene, chemical instruments and methods, temperature control, etc., can solve the problems of strength-toughness inversion, easy agglomeration of graphene, etc., achieve excellent strength and toughness, and less interface reaction , the effect of shortening the time of heat preservation

Active Publication Date: 2020-11-27
HARBIN INST OF TECH
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Problems solved by technology

[0005] In order to solve the problem that graphene is easy to agglomerate during the preparation of graphene-reinforced aluminum-based composite materials and the strength-toughness inversion of the prepared composite material, the present invention proposes a method for preparing a dual-mode structure graphene-reinforced aluminum-based composite material

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  • Preparation method for dual model-structure graphene-reinforced aluminum matrix composite

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specific Embodiment approach 1

[0024] Specific embodiment one: the preparation method of the dual-mode structure graphene reinforced aluminum-based composite material of the present embodiment is carried out according to the following steps:

[0025] 1. Weighing

[0026] Weighing 1.2% to 1.8% graphene oxide and 98.2% to 98.8% aluminum metal powder as raw materials by mass fraction;

[0027] 2. Preparation and dispersion of three-dimensional graphene

[0028] Add the graphene oxide weighed in step 1 into distilled water for ultrasonic dispersion to obtain a graphene oxide dispersion; add ascorbic acid solution to the graphene oxide dispersion under magnetic stirring conditions to obtain a graphene oxide colloid, and the graphene oxide colloid Carrying out vacuum freeze-drying to obtain a three-dimensional graphene skeleton; mixing the three-dimensional graphene skeleton with the aluminum metal powder weighed in step 1 and then ball milling to obtain a mixed powder;

[0029] 3. Preparation of double-mode st...

specific Embodiment approach 2

[0040] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: the average sheet diameter of the graphene oxide described in step 1 is 2 μm to 5 μm, and the average thickness is 5 to 10 nm; the average particle size of the aluminum metal powder described in step 1 The diameter is 10-30 μm.

specific Embodiment approach 3

[0041] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the aluminum metal powder in step 1 is made of Al-Mg-Si alloy, Al-Cu-Mg alloy, Al-Cu-Mn-Mg alloy, Al-Mn-Si-Cu alloy, Al-Si-Mg-Be alloy; in the Al-Mg-Si alloy, Mg is 0.45-4.8%, Si is 4.5-6.5%, and Cu is 0.6% ~0.8%; Cu in Al-Cu-Mg alloy is 1.5~4.5%, Mg is 0.3~3.8%; Cu in Al-Cu-Mn-Mg alloy is 3.8~4.9%, Mn is 0.3~9%, Mg is 1.5-1.8%; in Al-Mn-Si-Cu alloy, Mn is 4.2-5.6%, Cu is 0.6-0.8%, Fe is 0.1-1.0%, Si is 7.0-12%, and Ti is 0.1-1.0%; Al In the -Si-Mg-Be alloy, Si is 4.5-8.0%, Mg is 0.4-1.5%, Ti is 0.15-0.25%, and Be is 0.15-0.25%.

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Abstract

The invention provides a preparation method for a dual model-structure graphene-reinforced aluminum matrix composite and relates to a preparation method for an aluminum matrix composite. By means of the preparation method, the problems that graphene is easy to agglomerate when the graphene-reinforced aluminum matrix composite is prepared, and that strength-tenacity inversion exists in the preparedcomposite are solved. The preparation method comprises the steps that an ascorbic acid solution is added to an oxidized graphene dispersion liquid, and oxidized graphene colloid is acquired; vacuum freeze-drying is conducted, and a three-dimensional graphene framework is acquired; after the three-dimensional graphene framework and aluminum metal powder are mixed, ball milling is conducted, and mixed powder is acquired; and then pressure infiltration ingot preparation, heat deformation treatment and heat treatment are conducted sequentially. By means of the prepared three-dimensional grapheneframework structure, the phenomenon of agglomeration can be avoided; and through a dual-model structure of mixing of coarse grains and fine grains, the material strength is elevated, and in the meantime, the material tenacity can also be guaranteed. The preparation method for the dual model-structure graphene-reinforced aluminum matrix composite is applicable to preparation of graphene-reinforcedaluminum matrix composites.

Description

technical field [0001] The invention relates to a preparation method of an aluminum-based composite material. Background technique [0002] The emergence of graphene has brought revolutionary progress to the development of various fields. It has a one-atom-thick two-dimensional crystal structure and is the thinnest known material. Its electrical, optical, thermal, and mechanical properties are excellent, and its tensile strength and elastic modulus reach 125GPa and 1.1TPa, respectively. It is considered to be an ideal reinforcement for aluminum matrix composites. However, graphene is mostly used in the research of functional materials and devices at present. In contrast, research on structural materials is less and more focused on resin-based or ceramic-matrix composites. The application of graphene in metal matrix composites, especially in the preparation of graphene-reinforced aluminum matrix composites, started late, but developed rapidly, and some good results have be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C1/10B22F9/04B22F3/02B22F3/26B22D23/04C22C21/08C22C21/16C22F1/047C22F1/057B21B37/56B21B37/74C01B32/184C01B32/194
CPCB21B37/56B21B37/74B21B2265/10B22D23/04B22F3/02B22F3/26B22F9/04B22F2009/043C22C1/05C22C21/08C22C21/16C22F1/047C22F1/057C01B32/184C01B32/194
Inventor 邵溥真梅勇刘晋铭尹青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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