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A kind of preparation method of high toughness graphene/zk61 magnesium alloy composite material

A ZK61, composite material technology, applied in the field of composite material preparation, can solve the problems of weak interface bonding, poor graphene dispersion, easy agglomeration, etc., and achieve the effect of improving plasticity and saving sintering time

Active Publication Date: 2021-10-29
ZHENGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, graphene / magnesium-based composites still face two key problems: (1) graphene has poor dispersion in magnesium alloys and is easy to agglomerate; (2) the interfacial bonding between graphene and magnesium matrix is ​​weak

Method used

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  • A kind of preparation method of high toughness graphene/zk61 magnesium alloy composite material
  • A kind of preparation method of high toughness graphene/zk61 magnesium alloy composite material
  • A kind of preparation method of high toughness graphene/zk61 magnesium alloy composite material

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preparation example Construction

[0024] The invention provides a method for preparing a high-toughness graphene / ZK61 magnesium alloy composite material. The single-layer graphene oxide powder used in the method has a sheet diameter of 0.5-5 μm and a thickness of 0.8-1.2 nm; the ZK61 magnesium alloy powder includes 94.49 wt %Mg, 5.20wt% Zn, 0.31wt% Zr, average particle size 75μm. Specific steps are as follows:

[0025] 01. Disperse GO in a mixture of absolute ethanol and deionized water, and ultrasonically obtain a GO dispersion;

[0026] 02. Add the above GO dispersion into a magnetic stirrer, and add ZK61 magnesium alloy powder under magnetic stirring state, and stir to obtain a mixed solution;

[0027] 03. Let the above mixed solution stand still, remove the supernatant with a dropper and dry it, and grind the dried powder for 30 minutes to obtain GO / ZK61 magnesium alloy powder;

[0028] 04. Put the above GO / ZK61 magnesium alloy powder in H 2 10% volume fraction of H 2 / Ar mixed gas, 400°C for 180min, t...

Embodiment 1

[0032] This embodiment is as a comparative example, and the addition amount of graphene oxide is 0g, specifically:

[0033] Add 10g of ZK61 magnesium alloy powder into 330mL of a mixture of absolute ethanol and deionized water with a volume ratio of 9:1, stir magnetically for 1 hour to obtain a mixed solution; let the above mixed solution stand for 3 hours, and remove it with a rubber dropper The supernatant was dried at 60°C for 12 h, and the dried powder was ground with an agate mortar for 30 min; 2 10% volume fraction of H 2 Under / Ar mixed gas, heat preservation at 400°C for 180min; finally use spark plasma sintering, the axial pressure is 60MPa, and keep at 520°C for 5min.

Embodiment 2

[0035] The preparation method of the graphene / ZK61 magnesium alloy composite material of the present embodiment, the steps are as follows:

[0036] Disperse 50 mg of GO in 330 mL of a mixture of absolute ethanol and deionized water with a volume ratio of 9:1, and ultrasonicate for 2 hours to obtain a GO dispersion; add the above GO dispersion to a magnetic stirrer, and Add 10g of ZK61 magnesium alloy powder and stir for 1h to obtain a mixed solution; let the above mixed solution stand for 3h, remove the supernatant with a rubber dropper, dry at 60°C for 12h, and grind the dried powder with an agate mortar 30min, get GO / ZK61 magnesium alloy powder; Above-mentioned GO / ZK61 magnesium alloy powder is in H 2 10% volume fraction of H 2 / Ar mixed gas, 400 ° C for 180 min to obtain RGO / ZK61 magnesium alloy powder; the above RGO / ZK61 magnesium alloy powder was formed by SPS, the axial pressure was 60 MPa, and kept at 520 ° C for 5 min to obtain the graphite of this embodiment ene / ZK6...

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Abstract

The present invention proposes a method for preparing a high-toughness graphene / ZK61 magnesium alloy composite material. In the preparation method, RGO / ZK61 magnesium alloy powder is calcined by adding GO to ZK61 magnesium alloy powder, and graphene is prepared by spark plasma sintering. / ZK61 magnesium alloy composite material. Compared with the ZK61 magnesium alloy without graphene, the graphene / ZK61 magnesium alloy prepared by this method has significantly improved strength and toughness, and shows strong anisotropy in mechanical properties and structure.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, in particular to a preparation method of a high-toughness graphene / ZK61 magnesium alloy composite material. Background technique [0002] Magnesium alloy is currently the lightest metal structural material in industrial applications. It has the advantages of high specific strength, large specific modulus and easy recycling. It is an internationally recognized green and sustainable material. It is currently used in large aircraft and high-speed rail vehicles. , The light weight structure of electric vehicles has a good application prospect. Magnesium has a hexagonal close-packed lattice structure, and there are only three slip systems at room temperature, resulting in poor plasticity of magnesium-based materials. Crystallization annealing after thermal processing or cold deformation can refine the grains of magnesium-based materials. However, the microstructure of the magne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C23/04B22F3/105B22F9/04
CPCB22F3/105B22F9/04B22F2003/1051C22C1/05C22C23/04
Inventor 叶礼范玉超张迎九
Owner ZHENGZHOU UNIV
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