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Preparation method of in-situ grown graphene reinforced metal-based composite material

A metal composite material and composite material technology, applied in the field of metal matrix composite material preparation, can solve the problems of dangerous process, low strength, and many defects, and achieve the effects of easy industrialized mass production, high degree of crystallization, and short preparation cycle

Inactive Publication Date: 2017-03-22
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the following problems will be encountered in the preparation of metal matrix composites by using GO or rGO: (1) The preparation process of GO is complicated, and strong oxidants such as concentrated sulfuric acid and potassium permanganate are needed, which is dangerous and not environmentally friendly; Oxidized graphene has poor crystallization degree, low strength and many defects; (3) in the composite material prepared by external addition method, graphene is easy to agglomerate, and only physical and mechanical mixing with the metal matrix, poor interface bonding; etc.
However, it is still necessary to prepare GO materials first through a complicated process

Method used

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  • Preparation method of in-situ grown graphene reinforced metal-based composite material
  • Preparation method of in-situ grown graphene reinforced metal-based composite material

Examples

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Effect test

example 1

[0022] 0.6g of sucrose and 18g of nickel powder (the mass ratio of sucrose in the composite powder is 3.23%) were uniformly mixed in 200mL of water (which can completely dissolve sucrose), stirred mechanically, and evaporated to dryness by heating at 70°C. After 24 hours of vacuum drying (10torr) and grinding, the nickel powder / sucrose prefabricated powder was obtained. Put the prefabricated powder in a hot press, under the protection of argon (500mL / min) atmosphere, raise the temperature from room temperature to 1000°C at a rate of 10°C / min, keep it warm for 30min, load the pressure at 1000MPa, and cool down with the furnace, one-step method Obtain graphene-enhanced nickel-based composites, materials such as figure 1 Shown is a graphene-reinforced Ni-based composite block with a diameter of 30 mm and a thickness of approximately 3 mm. The prepared material was corroded by a 1mol / L ferric chloride solution, and observed by a scanning electron microscope (SEM). Such as figu...

example 2

[0024] 0.3 g of glucose and 30 g of copper-nickel alloy powder were evenly mixed in 200 mL of water (glucose accounted for 0.99%), stirred mechanically, and evaporated to dryness by heating at 70°C. After 24 hours of vacuum drying (10torr) and grinding, the copper-nickel / glucose prefabricated powder was obtained. Put the prefabricated powder in a hot press, under the protection of argon (100mL / min) atmosphere, raise the temperature from room temperature to 1300°C at a rate of 10°C / min, keep it warm for 48h, load the pressure at 2000MPa, and cool down with the furnace, one step Graphene-reinforced copper-nickel alloy matrix composites were obtained by this method. Higher temperature will increase the graphitization degree of graphene to a certain extent.

example 3

[0026] 0.3 g of glucose and 30 g of nickel powder were uniformly mixed in 200 mL of water (glucose accounted for 0.99%), stirred mechanically, and evaporated to dryness by heating at 70°C. After 24 hours of vacuum drying (10torr) and grinding, nickel / glucose prefabricated powder was obtained. Put the prefabricated powder in a hot press, under the protection of argon (300mL / min) atmosphere, raise the temperature from room temperature to 500°C at a rate of 10°C / min, keep it warm for 24h, load the pressure at 10MPa, and cool down with the furnace, one step Graphene-reinforced nickel-based composites were obtained by this method.

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Abstract

The invention relates to a preparation method of an in-situ grown graphene reinforced metal-based composite material. Carbon-containing organic matter and metal or metal alloy powder are dissolved and mixed in a solvent, mechanically stirred, heated at the temperature of 50-150 DEG C and mixed, the solvent is evaporated, and prefabricated powder is obtained through vacuum drying at the temperature of 50-100 DEG C and grinding; and through the powder metallurgy technique of a hot-press forming method or a cold-press-sintering method or an SPS sintering method, the prefabricated powder is pressed and formed, the carbon-containing organic matter is transformed into graphene, and the three-dimensional graphene / metal-based composite material is obtained. The preparation method is simple, easy to implement and short in preparation cycle, and industrialized batch production is easy; and in addition, the graphene directly grows on a metal matrix in the preparation process, the crystallisation degree of the graphene in the obtained graphene reinforced metal-based composite material is high, the number of defects is small, and the dispersity is good. The preparation method has potential application prospects in the composite material field, the functional material field and the like.

Description

technical field [0001] The invention relates to a method for preparing an in-situ growth graphene-reinforced metal-matrix composite material, and belongs to the technical fields of carbon nanometer material preparation and metal-matrix composite material preparation. Background technique [0002] With the continuous development of aerospace and automobile manufacturing technology, lightweight and high-strength metal matrix composites have received extensive attention and research. As a lightweight material with excellent mechanical, electrical, and thermal properties, carbon nanomaterials have been widely used in metal matrix composites, catalysis, and energy in recent years. Among them, graphene, as a sp 2 Two-dimensional nanomaterials composed of hybrid carbon atoms with a thickness of only one or several layers of carbon atoms, due to their high thermal conductivity (3000Wm -1 K -1 ), strength (110GPa) and specific surface area (2630m 2 g -1 ) and other advantages, i...

Claims

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Application Information

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IPC IPC(8): C22C1/04C22C1/10C22C32/00
CPCC22C1/04C22C1/10C22C32/00
Inventor 赵乃勤沙军威张翔马丽颖刘恩佐师春生何春年李群英李家俊
Owner TIANJIN UNIV
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