Preparation method of in-situ synthesized aluminum oxide-aluminum nitride synergetic graphene enhanced aluminum-based composite material

A technology for strengthening aluminum-based and composite materials, applied in the direction of graphene, chemical instruments and methods, carbon compounds, etc., can solve the problem of large brittleness and equality, and achieve the effects of improving plasticity, avoiding agglomeration, and promoting uniform dispersion

Active Publication Date: 2020-11-27
HARBIN INST OF TECH
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  • Application Information

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Problems solved by technology

[0005] In order to solve the problem that there are a large number of brittle phases in the graphene-reinforced aluminum-matrix composite material prepared by the existing method, the present invention proposes a method for preparing an in-situ self-generated alumina-aluminum nitride synergistic graphene-reinforced aluminum-matrix composite material

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  • Preparation method of in-situ synthesized aluminum oxide-aluminum nitride synergetic graphene enhanced aluminum-based composite material
  • Preparation method of in-situ synthesized aluminum oxide-aluminum nitride synergetic graphene enhanced aluminum-based composite material
  • Preparation method of in-situ synthesized aluminum oxide-aluminum nitride synergetic graphene enhanced aluminum-based composite material

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specific Embodiment approach 1

[0029] Specific embodiment one: In this embodiment, the preparation method of in-situ self-generated alumina-aluminum nitride synergistic graphene-reinforced aluminum matrix composite material is carried out according to the following steps:

[0030] 1. Weighing

[0031] Weighing 0.3% to 4% of graphene and the rest of the aluminum metal powder as raw materials by mass fraction; weighing the aluminum alloy block, the weight ratio of the aluminum alloy block to the aluminum metal powder is (3 to 10): 1;

[0032] 2. Graphene dispersion and prefabricated block forming

[0033] Mix the graphene and aluminum metal powder weighed in step 1 and perform ball milling, disperse the mixed powder obtained after ball milling into an aqueous ethanol solution, add a dispersant and stir, then filter and dry in sequence to obtain a graphene-aluminum mixed powder , and then the graphene-aluminum mixed powder is packed into a cold-pressing mold for cold pressing to obtain a graphene / aluminum pre...

specific Embodiment approach 2

[0046] Embodiment 2: This embodiment differs from Embodiment 1 in that the graphene described in step 1 is few-layer graphene, with an average sheet diameter of 200 nm-20 μm and an average thickness of 0.3-30 nm.

specific Embodiment approach 3

[0047] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the dispersant described in step two is polyethylene glycol (polymerization degree is 100~1000), polyvinyl alcohol (polymerization degree is 100~1000) , sodium dodecylbenzenesulfonate, cetyltrimethylammonium bromide, ammonia water or polydimethylsiloxane (polymerization degree 100-500), etc.

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Abstract

The invention relates to a preparation method of an in-situ synthesized aluminum oxide-aluminum nitride synergetic graphene enhanced aluminum-based composite material and relates to a preparation method of a graphene enhanced aluminum-based composite material. The preparation method aims to solve the problem that the graphene enhanced aluminum-based composite material prepared by an existing method has a lot of brittle phases. The preparation method comprises the following steps of mixing and ball-milling graphene and aluminum metal powder, dispersing the powder in an ethanol aqueous solution,adding a dispersant to obtain graphene-aluminum mixed powder, and performing cold pressing to obtain a graphene-aluminum preform; performing infiltration in a mixed gas condition of nitrogen and oxygen to obtain a composite material cast ingot; finally, performing large plastic deformation treatment and component homogenization treatment. In a sintering process, oxygen-nitrogen mixed gas is introduced and dispersed and enters into graphene-aluminum interface layers to form a mixed thin layer of aluminum oxide and aluminum nitride, so that interface bonding is guaranteed and generation of harmful products on the interface is avoided. The preparation method provided by the invention is suitable for preparing the aluminum-based composite material.

Description

technical field [0001] The invention relates to a preparation method of a graphene-reinforced aluminum-based composite material. Background technique [0002] Aluminum metal has the characteristics of light weight and high strength, and is widely used in industrial production. With the development of science and technology, the demand for aluminum matrix composite materials with ultra-high strength, ultra-high stiffness and high plasticity is becoming more and more obvious. As a brand-new two-dimensional reinforcement, graphene has extremely high theoretical strength. The tensile strength of graphene is as high as 125GPa, and the elastic modulus is as high as 1TPa. It has great development space in the reinforcement of composite materials. [0003] However, there are many problems in the composite of graphene and aluminum metal. As a nano-reinforcement, graphene itself has extremely high reactivity. During the material sintering process, graphene is very easy to react wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C1/10B22F9/04B22F3/02B22F3/26B22D23/04C22C21/08C22C21/14C22F1/047C22F1/057B21B37/74B21B37/56
CPCB21B37/56B21B37/74B21B2265/10B22D23/04B22F3/02B22F3/26B22F9/04B22F2009/043C22C1/05C22C21/08C22C21/14C22F1/047C22F1/057C01B32/184C01B32/194
Inventor 鞠渤宇谢伟刘晋铭杨文澍张强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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