A preparation method of cast graphene/aluminum alloy composite material and cast graphene/aluminum alloy composite material

A composite material and graphene technology, which is applied in the field of casting graphene/aluminum alloy composite material and the preparation field of casting graphene/aluminum alloy composite material, can solve the problems of uneven distribution and poor wettability, and avoid uneven distribution. , The effect of improving tensile strength and enhancing bonding strength

Active Publication Date: 2019-06-07
WUXI JCNANO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is to provide a method for preparing a cast graphene / aluminum alloy composite material for the above-mentioned technical problems in the existing traditional method for preparing graphene and aluminum-based composite materials. The surface of graphene is pretreated by metal coating, boric acid treatment and adding titanium, etc., which overcomes the disadvantage of poor interfacial wettability between graphene and aluminum alloy substrates, and effectively solves the problem of graphene and metal under high temperature. Oxidation avoids undesirable phenomena such as uneven distribution in the matrix caused by the agglomeration and floating of graphene particles, thereby improving the comprehensive properties of the composite material such as heat resistance, strength and wear resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In order to fully disperse the graphene powder in the plating solution, and the particle size is not easy to vary too much, the graphene powder is sieved to ensure the uniformity of the particle size.

[0038] After sieving the graphene powder, a graphene powder with uniform sheet diameter is obtained; after that, it is activated by heating at 300°C for 1 hour, which can remove oily impurities and gases on the surface of the powder, and improve the wettability with the solution .

[0039]Take 20 grams of activated graphene powder and place it in a self-made hexagonal plastic bucket, add 3ml of glacial acetic acid to wet the graphene, continue to add 60 grams of powdered copper sulfate and 15 grams of zinc particles (if the surface of the zinc particles is oxidized, it must be cleaned before use) 5% sulfuric acid is heated for dissolving treatment), and finally add 30ml of water, rolling for 25 minutes (if the time is too long, the coating will thicken). The rotating sp...

Embodiment 2

[0049] Its total process route is as follows:

[0050] Graphene powder→cleaning and degumming with acetone (soaking for 2 hours)→degreasing with lye (30 minutes)→electroplating nickel-copper alloy→vacuum heat treatment (700°C for 30min, 750°C for 30min, 800°C for 60min) and molten aluminum casting, etc.

[0051] In order to fully disperse the graphene powder in the plating solution, and the particle size is not easy to vary too much, the graphene powder is sieved to ensure the uniformity of the particle size.

[0052] After sieving the graphene powder, the graphene powder with uniform sheet diameter was obtained; followed by acetone cleaning and degumming (soaking for 2 hours), lye degreasing (30 minutes), and then heating at 300 ° C for 1 hour Treatment can remove oily impurities and gases on the surface of the powder, and improve the wettability with the solution.

[0053] The following electroplating process ratio is adopted:

[0054] Metal nickel (as NiCl 2 form added) ...

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Abstract

The invention discloses a preparing method for a cast graphene / aluminum alloy composite material. The preparing method includes the following steps that firstly, graphene metallization is conducted; secondly, titanium compound treatment is conducted; thirdly, boric acid coating is conducted; and fourthly, the cast graphene / aluminum alloy composite material is prepared. By means of the preparing method, the defect that the interface wettability between graphene and an aluminum alloy matrix is poor is overcome, oxidization of graphene and metal under the high temperature is effectively avoided, the poor phenomenon that distribution in the matrix is not uniform due to agglomeration and floating of graphene particles is avoided, and comprehensive performance such as heat resistance, strength and wear resistance of the composite material is improved.

Description

technical field [0001] The invention relates to the technical field of graphene metal-based composite materials, in particular to a preparation method of a cast graphene / aluminum alloy composite material and a cast graphene / aluminum alloy composite material. Background technique [0002] Aluminum-based graphene self-lubricating composite materials have excellent wear resistance, scratch resistance and self-lubricating properties, and at the same time greatly improve the shock-absorbing performance and cutting performance of traditional materials. It has important applications and broad prospects in the manufacture of friction pair wear-resistant parts on engines and other machinery. [0003] For a long time in the past, traditional graphene-aluminum matrix composites have not been well developed. The key reason is that the wettability of aluminum and graphene is poor, and it is not easy to achieve uniform mixing. Firstly, the "powder metallurgy" method was introduced, but t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/10C22C21/00
CPCC22C1/101C22C1/1036C22C21/00
Inventor 廖威
Owner WUXI JCNANO TECH CO LTD
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