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Preparation method of polyethylene glycol repaired graphene reinforced aluminum-based composite material

A polyethylene glycol-reinforced aluminum-based technology, which is applied in the field of preparation of graphene-reinforced aluminum-based composite materials, can solve problems such as difficulty in the decomposition of grinding aids and residues in aluminum alloy substrates, and achieve convenient follow-up operations, low volatility, and The effect of improving the ability to bear load

Active Publication Date: 2018-12-07
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem that the grinding aid used in the dispersion and opening process of graphene is difficult to decompose or produce residues in the aluminum alloy matrix, a preparation method for polyethylene glycol repairing graphene-reinforced aluminum matrix composites is proposed

Method used

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  • Preparation method of polyethylene glycol repaired graphene reinforced aluminum-based composite material

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specific Embodiment approach 1

[0026] Specific embodiment one: the preparation method of polyethylene glycol repairing graphene reinforced aluminum matrix composite material according to the following steps in this embodiment:

[0027] 1. Weighing

[0028] Weighing 0.5% to 4% graphene, 2% to 50% polyethylene glycol and the rest of the aluminum metal powder as raw materials by mass fraction;

[0029] 2. Graphene dispersion and prefabricated block forming

[0030] Put the graphene, polyethylene glycol and aluminum metal powder weighed in step 1 into a ball mill jar, ball mill the obtained mixed powder at a speed of 100-250 rpm for 0.5-7 hours, and put the mixed powder obtained after ball milling into a cold-press mold Carrying out cold pressing to obtain polyethylene glycol-graphene / aluminum prefabricated body;

[0031] 3. Prefabricated block insulation

[0032] Put the polyethylene glycol-graphene / aluminum preform obtained in step 2 into a vacuum furnace, heat to 350-380°C and keep it warm for 2-2.5h, the...

specific Embodiment approach 2

[0041] 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-15 μm and an average thickness of 1-30 nm. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0042] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the average particle size of the aluminum metal powder in Step 1 is 1-30 μm. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a preparation method of polyethylene glycol repaired graphene reinforced aluminum-based composite material, and relates to the preparation method of graphene reinforced aluminum-based composite material. The preparation method aims to solve a problem that grinding aid is residual in an aluminum alloy matrix, and realize self-repairing of the graphene. The preparation methodcomprises the step 1 of weighing the graphene, the polyethylene glycol and aluminum metal powder; the step 2 of putting the material obtained in the step 1 into a ball milling tank for ball milling;the step 3 of cold pressing; and the step 4 of preparing the composite material after the cold pressing. The grinding aid, polyethylene glycol is subjected to thermal decomposition to generate activeC atoms, and the C atoms can adsorb on the pits of the graphene, so that integrity of the graphene structure is greatly improved, good interface connection is formed, and overall performance of the material is greatly improved; the polyethylene glycol is beneficial to flake formation of the aluminum metal powder, so that a problem of high dispersion difficulty of the single-layer or few-layer graphene in the aluminum-based composite material is solved, and cold welding between the aluminum metal powders is reduced; polyethylene glycol is easy to remove, and the prepared few-layer graphene reinforced aluminum-based composite material is excellent in comprehensive performance. The method is suitable for preparing the graphene reinforced 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] Graphene has a tensile strength as high as 125GPa, an elastic modulus of 1TPa, and a thermal conductivity of 5000W / (m K), which is undoubtedly a nearly ideal reinforcement with superior comprehensive performance. According to the number of layers, graphene can be divided into single-layer graphene, double-layer graphene, few-layer graphene (3-10 layers) and multi-layer graphene (the number of layers is more than 10 layers, and the total thickness is less than 10nm). At present, the research on using graphene to improve the performance of resins and ceramics is the most active, while the research on using graphene to strengthen metal matrix, especially aluminum matrix composites is relatively less. The preparation methods are mainly solid-phase method and liquid-phase method. The solid-phase method includes various p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C1/10C22C21/00C22C32/00
CPCC22C1/0416C22C1/05C22C21/00C22C32/0084
Inventor 鞠渤宇武高辉杨文澍姜龙涛张强陈国钦康鹏超修子扬乔菁
Owner HARBIN INST OF TECH
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