Preparation method of in-situ synthesized Cu-graphene heteropolymer reinforced aluminum matrix composite

A technology of olefin heteropolymers and composite materials, which is applied in the field of powder metallurgy, can solve the problems of weak interface bonding strength of composite materials, graphene damage, non-wetting of graphene and aluminum substrates, etc., to improve interface bonding and sintering Densification and the effect of improving process efficiency

Active Publication Date: 2018-12-18
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on graphene-reinforced aluminum-based composite materials is mainly to mix graphene and aluminum with high-energy ball milling and form them into bulk materials. This high-energy ball milling process seriously damages graphene, which seriously reduces the strengthening effect of graphene. , and due to the non-wetting characteristics of graphene and aluminum matrix, the interface bonding strength of the final composite material is weak, and the interface load transfer efficiency is low. This is the bottleneck encountered by graphene-reinforced aluminum matrix composites. On the basis of maintaining the integrity of graphene structure, achieving good dispersion and strong and clean interfacial bonding is the focus of current research

Method used

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  • Preparation method of in-situ synthesized Cu-graphene heteropolymer reinforced aluminum matrix composite
  • Preparation method of in-situ synthesized Cu-graphene heteropolymer reinforced aluminum matrix composite
  • Preparation method of in-situ synthesized Cu-graphene heteropolymer reinforced aluminum matrix composite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) 2.3g nickel nitrate hexahydrate, 0.94g glucose, 40g sodium chloride were placed in deionized water for magnetic stirring for 6 hours, the resulting mixed solution was placed in a refrigerator for 48h, and the frozen solution was placed in a freeze dryer Freeze-dried for 24 h to obtain the precursor composite powder; the obtained precursor composite powder was placed at 750 °C, reduced and calcined in a hydrogen atmosphere for 2 hours, and finally washed with water to remove sodium chloride to obtain a Cu-graphene heteropolymer, such as figure 1 shown.

[0018] (2) The obtained Cu-graphene heteropolymer / aluminum powder was placed in a ball milling jar according to the ratio of 1:199, and filled with argon as a protective atmosphere. In a planetary ball mill, it is subjected to low-speed and short-time intermittent ball milling (360 rpm, 10 minutes for each ball milling, intermittent 30 minutes, and 80 minutes for ball milling).

[0019] (3) The obtained composite po...

Embodiment 2

[0023] (1) 2.3g nickel nitrate hexahydrate, 0.94g glucose, 40g sodium chloride were placed in deionized water for magnetic stirring for 6 hours, the resulting mixed solution was placed in a refrigerator for 48h, and the frozen solution was placed in a freeze dryer Freeze-dried for 24 h to obtain the precursor composite powder; the obtained precursor composite powder was placed at 750 °C, reduced and calcined in a hydrogen atmosphere for 2 hours, and finally washed with water to remove sodium chloride to obtain a Cu-graphene heteropolymer, such as figure 1 shown.

[0024] (2) The obtained Cu-graphene heteropolymer / aluminum powder was placed in a ball mill in a ratio of 1:135, and filled with argon as a protective atmosphere. In a planetary ball mill, it is subjected to low-speed and short-time intermittent ball milling (360 rpm, 10 minutes for each ball milling, intermittent 30 minutes, and 80 minutes for ball milling).

[0025] (3) The obtained composite powder was cold-press...

Embodiment 3

[0029] (1) 2.3g nickel nitrate hexahydrate, 0.94g glucose, 40g sodium chloride were placed in deionized water for magnetic stirring for 6 hours, the resulting mixed solution was placed in a refrigerator for 48h, and the frozen solution was placed in a freeze dryer Freeze-dried for 24 h to obtain the precursor composite powder; the obtained precursor composite powder was placed at 750 °C, reduced and calcined in a hydrogen atmosphere for 2 hours, and finally washed with water to remove sodium chloride to obtain a Cu-graphene heteropolymer, such as figure 1 shown.

[0030] (2) The obtained Cu-graphene heteropolymer / aluminum powder was placed in a ball mill in a ratio of 1:99, and filled with argon as a protective atmosphere. In a planetary ball mill, it is subjected to low-speed and short-time intermittent ball milling (360 rpm, 10 minutes for each ball milling, intermittent 30 minutes, and 80 minutes for ball milling).

[0031] (3) The obtained composite powder was cold-presse...

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Abstract

The invention relates to a preparation method of an in-situ synthesized Cu-graphene heteropolymer reinforced aluminum matrix composite. The preparation method of the in-situ synthesized Cu-graphene hybrid polymer reinforced aluminum matrix composite comprises the following steps of preparation of a Cu-graphene heteropolymer: uniformly mixing copper nitrate trihydrate, glucose and sodium chloride in deionized water; placing uniformly mixed solution in an environment with temperature of -20 degrees centigrade for 48 h; using a freezing and drying technology to obtain a precursor powder; using achemical vapor deposition method to calcine and reduce the precursor powder; and finally, using the deionized water to wash off sodium chloride template to obtain the Cu-graphene heteropolymer; and mixing of the Cu-graphene / aluminum matrix composite powder: placing the obtained composite powder under a condition of 500 MPa to be formed through cold pressing; sintering a cold-pressed block body material in a tube furnace for 1 h through argon shielding, and finally hotly extruding the sintered block body material under an environment condition of 600 MPa according to an extrusion ratio of 1:40so as to obtain a Cu-graphene / aluminum block body composite.

Description

Technical field: [0001] The invention relates to a preparation method for improving the mechanical properties of an aluminum matrix composite material by using an in-situ synthesis method, and belongs to the technical field of powder metallurgy. Background technique: [0002] Aluminum matrix composites are widely used in automobile, aerospace, military and other fields due to their high specific strength, specific modulus, good high temperature performance and corrosion resistance, but traditional reinforcing phases such as ceramic particles, whiskers, and fibers, etc. Due to its large specific gravity and limited strength, it is increasingly difficult to meet the application requirements of modern industry for lightweight and high-strength structural composites. Graphene-reinforced aluminum matrix composites are an ideal material to achieve these requirements. [0003] As a reinforcing phase that has gradually attracted attention in recent years, graphene has high mechanica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C21/00B22F9/22
CPCB22F9/22B22F2998/10C22C1/05C22C21/00B22F3/02B22F2003/208
Inventor 何春年王杰赵乃勤师春生刘恩佐何芳马丽颖沙军威李群英
Owner TIANJIN UNIV
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