Carbon material-aluminum-based composite material with good interface bonding and preparation method

An aluminum-based composite material and interface bonding technology, which is applied in the field of composite material preparation, can solve the problems that the comprehensive performance is difficult to meet industrial needs, the functional characteristics of composite materials are deteriorated, and it is not suitable for industrial production, etc., to achieve outstanding functional characteristics and good mechanical properties , the effect of improving performance

Active Publication Date: 2021-06-25
NANCHANG HANGKONG UNIVERSITY
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  • Application Information

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Problems solved by technology

These methods require the use of expensive and toxic chemical reagents, and the process is relatively complicated, which is not suitable for industrial production; in addition, the modification effect of these methods is not ideal, especially reflected in the deterioration of the functional properties of the composite material, and its comprehensive performance Difficult to meet industrial needs

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  • Carbon material-aluminum-based composite material with good interface bonding and preparation method
  • Carbon material-aluminum-based composite material with good interface bonding and preparation method
  • Carbon material-aluminum-based composite material with good interface bonding and preparation method

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preparation example Construction

[0023] A method for preparing a carbon material-aluminum matrix composite material with good interfacial bonding provided by the invention comprises the following steps:

[0024] After mixing the carbon material to be composited with the aluminum-based material to form a composite material to be composited, preheating, friction extrusion, and rapid cooling during the extrusion process, the carbon material-aluminum-based composite material is obtained.

[0025] The present invention is provided with a preheating device and a quenching device in the process of preparing composite materials by friction extrusion; the preheating device is arranged in the front section of friction extrusion, and the composite material is preheated before friction extrusion, which can increase the material mixing temperature Promote the interdiffusion of carbon and metal atoms; install the quenching device in the rear section of friction extrusion, and use the quenching device for rapid cooling durin...

Embodiment 1

[0041] The raw materials were weighed according to the following proportions: 0.8vol.% graphene (sheet diameter 5-50 μm, thickness 3.4-8 nm) and 99.2vol.% 6061 aluminum powder (average particle size about 50 μm). Graphene and aluminum powder are mixed in the powder mixer for 2 hours and then filled into the aluminum sheath for "friction extrusion". The process parameters are set as: preheating temperature 150°C, friction head rotation speed 620r / min, 0.4mm / s, using liquid nitrogen for cooling, and T6 heat treatment after obtaining the graphene-aluminum matrix composite material.

[0042] The interface microstructure and metallographic structure of the composite materials are as follows: figure 2 a and image 3 as shown in a. There is an obvious transition layer at the graphene-aluminum matrix interface of the composite material, which is formed by the interdiffusion of carbon and aluminum atoms. It is a diffusion interface, and the average grain size of the matrix is ​​abou...

Embodiment 2

[0047] The raw materials were weighed according to the following proportions: 1vol.% graphene (sheet diameter about 2-10 μm, thickness 3nm) and 99vol.% ZL114 aluminum powder (average particle size about 50 μm). Graphene and aluminum powder are mixed in the powder mixer for 2 hours and then filled into the aluminum sheath for "friction extrusion". The process parameters are set as: preheating temperature 150°C, friction head rotation speed 620r / min, 0.3mm / s, using liquid nitrogen for cooling, and T6 heat treatment after obtaining the graphene-aluminum matrix composite material.

[0048] Tensile tests and thermal conductivity tests at room temperature showed that the average tensile strength and thermal conductivity of the composites were 318MPa and 164W / m.k, respectively.

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Abstract

The invention discloses a preparation method of a carbon material-aluminum-based composite material with good interface bonding, and belongs to the technical field of composite material preparation. The preparation method comprises the following steps that after a carbon material and an aluminum-based material are mixed to form a to-be-compounded material, preheating is conducted, then friction extrusion is conducted, rapid cooling is conducted in the extrusion process, and the carbon material-aluminum-based composite material is obtained, wherein the preheating temperature ranges from 100 DEG C to 150 DEG C. According to the preparation method provided by the invention, the mixing temperature is increased when the to-be-compounded material passes through a friction head rotating at a high speed through preheating at the front section of friction extrusion, so that mutual diffusion of carbon and metal atoms is promoted; and a carbon material-aluminum-based interface subjected to atomic diffusion does not have enough time for a further interface reaction due to quenching at the rear section of friction extrusion, a diffusion type interface with good interface bonding is formed, and the method has important significance on improving the performance of the composite material.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a carbon material-aluminum matrix composite material with good interface bonding and a preparation method. Background technique [0002] Metal matrix composites represented by aluminum matrix have high specific strength, specific modulus, wear resistance, reliability and good heat transfer and electrical conductivity, and are widely used in modern industry. The reinforcing phase of composite materials can be particles, whiskers, fibers, etc., and the performance of the material is related to the nature, shape, and size of the reinforcing phase. Carbon materials (such as carbon nanotubes, graphene, etc.) have excellent comprehensive properties. Combining them with metals as a reinforcing phase is expected to greatly improve the mechanical properties and functional properties of materials. It has fascinating applications in the fields of aerospace...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C21/00C22C26/00C22C32/00B22F3/20
CPCC22C1/05C22C21/00C22C26/00C22C32/0084B22F3/20C22C2026/002
Inventor 夏春曹建黄春平刘强柯黎明
Owner NANCHANG HANGKONG UNIVERSITY
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