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A kind of preparation method of graphene/aluminum composite material

An aluminum composite material and graphene technology, which is applied in metal material coating process, liquid chemical plating, coating, etc., can solve the problems of severe graphene agglomeration, poor material uniformity, and poor interface bonding ability

Active Publication Date: 2018-10-02
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing preparation methods have the following disadvantages: (1) The interface bonding ability between graphene and aluminum alloy is poor, graphene is easy to pull out from the matrix aluminum alloy when the composite material is stressed, and the reinforcing effect of graphene cannot be fully obtained. (2) Due to the direct contact between graphene and aluminum, graphene and aluminum react at high temperature to form a brittle phase Al 4 C 3 , which reduces the strength of the composite material; (3) The graphene agglomeration is more serious, and the material uniformity is poor

Method used

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  • A kind of preparation method of graphene/aluminum composite material
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  • A kind of preparation method of graphene/aluminum composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0058] (1) Graphene electroless nickel plating

[0059] a. Sensitization: control SnCl 2 Sensitizer (SnCl 2 Concentration of 15g / L, HCl concentration of 10mg / L) and temperature of 20°C, graphene was added in an amount of 11mg / mL and ultrasonically oscillated for 30min, filtered, and washed with deionized water until neutral.

[0060] b. Activation: control PbCl 2 Activation solution (PbCl 2 The concentration is 0.1g / L, the concentration of HCl is 10 mL / L) and the temperature is 20°C. Add the sensitized graphene in the amount of 11 mg / mL and ultrasonically vibrate for 30 minutes, filter, and wash with deionized water until neutral .

[0061] c. Electroless nickel plating: add the sensitized and activated graphene to the electroless nickel plating solution (the concentration of nickel chloride is 25g / L, the concentration of sodium hypophosphite is 30g / L, and the concentration of glycolic acid is 15g) / L), stirring, the pH value of the plating solution was adjusted to 8 with...

Embodiment 2

[0066] (1) Graphene electroless nickel plating

[0067] a. Sensitization: control SnCl 2 Sensitizer (SnCl 2 Concentration of 24g / L, HCl concentration of 19mL / L) and temperature of 23°C, graphene was added in an amount of 12mg / mL and ultrasonically oscillated for 35min, filtered, and washed with deionized water until neutral.

[0068] b. Activation: control PbCl 2 Activation solution (PbCl 2 The concentration is 0.4g / L, the concentration of HCl is 20 mL / L) and the temperature is 23°C. Add the sensitized graphene in an amount of 12mg / mL and ultrasonically vibrate for 35min, filter, and wash with deionized water until neutral .

[0069] c. Electroless nickel plating: Add the sensitized and activated graphene to the electroless nickel plating solution in an amount of 7mg / mL (the concentration of nickel chloride is 28g / L, the concentration of sodium hypophosphite is 33g / L, and the concentration of glycolic acid is 21g / L), stirring, the pH value of the plating solution was adj...

Embodiment 3

[0074] (1) Graphene electroless nickel plating

[0075] a. Sensitization: control SnCl 2 Sensitizer (SnCl 2 Concentration of 33g / L, HCl concentration of 28mL / L) and temperature of 25°C, graphene was added in an amount of 13mg / mL and ultrasonically oscillated for 40min, filtered, and washed with deionized water until neutral.

[0076] b. Activation: control PbCl 2 Activation solution (PbCl 2 The concentration is 0.7g / L, the concentration of HCl is 30mL / L) and the temperature is 25°C. The sensitized graphene is added in an amount of 13mg / mL and ultrasonically oscillated for 40min, filtered, and washed with deionized water until neutral.

[0077] c. Electroless nickel plating: add the sensitized and activated graphene to the electroless nickel plating solution (the concentration of nickel chloride is 30g / L, the concentration of sodium hypophosphite is 35g / L, and the concentration of glycolic acid is 27g) / L), stirring, the pH value of the plating solution was adjusted to 9 wi...

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Abstract

The invention discloses a preparation method of a graphene / aluminum composite material, which belongs to the field of metal matrix composite materials. Using aluminum alloy powder and graphene with a semi-solid temperature range as raw materials, the main steps are: (1) electroless nickel plating on graphene; (2) mixing materials; (3) pressing; (4) semi-solid extrusion. The graphene / aluminum composite material prepared by the present invention has good wettability between nickel-plated graphene and aluminum alloy, high metallurgical bonding strength, uniform distribution of nickel-plated graphene in the matrix aluminum alloy, compact structure, high specific strength, With high specific stiffness, good thermal conductivity and electrical conductivity, it has broad application prospects in many fields such as national defense and military industry, aerospace, electric power, heat exchange, etc.

Description

technical field [0001] The invention relates to a preparation method of a graphene / aluminum composite material, which belongs to the field of metal matrix composite materials. Background technique [0002] Graphene is a single-layer or multi-layer atomic two-dimensional crystal formed by sp2 hybridization of carbon atoms. It has low density, high strength, high elastic modulus and good thermoelectric properties. It is an ideal composite material reinforcement. . Graphene / aluminum composite material is a composite material obtained by adding flake graphene reinforcement phase to aluminum matrix, which has the advantages of light weight, high specific strength, high specific stiffness, low thermal expansion coefficient, high thermal conductivity, etc. , has broad application prospects in many fields such as national defense and military industry, aerospace, electric power, heat exchange, etc. [0003] At present, the preparation methods of aluminum-based graphene composites ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D17/00C23C18/36C22C1/10C22C21/00
CPCC22C1/101C22C1/1036C22C21/00C23C18/1639C23C18/1889C23C18/36B22D17/007C22C1/1052C22C1/12
Inventor 左孝青田继华罗晓旭周芸陈显宁陆建生刘荣佩
Owner KUNMING UNIV OF SCI & TECH
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