Preparation method of carbon nanotube reinforced aluminum base composite material

A technology of carbon nanotubes and composite materials, which is applied in the field of nanocomposite material preparation, to achieve the effects of densification, low energy consumption, avoiding heating and cooling, and long-term high-temperature residence

Active Publication Date: 2016-07-06
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But so far, there is still a lack of an effective and economical method for preparing carbon nanotube-reinforced aluminum matrix composites

Method used

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  • Preparation method of carbon nanotube reinforced aluminum base composite material
  • Preparation method of carbon nanotube reinforced aluminum base composite material
  • Preparation method of carbon nanotube reinforced aluminum base composite material

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0033] Example 1 see figure 1 , the preparation method of the carbon nanotube reinforced aluminum matrix composite material comprises:

[0034] Step 1. Mix the pure aluminum powder with an average particle size of 20 microns, the process control agent stearic acid, and the multi-walled carbon nanotubes with a mass percentage of 1.5% and a tube diameter of 40 nanometers in sequence, and adopt a planetary ball milling process , the ball-to-material ratio is 10 / 1, the rotating speed is 300 rpm, and the ball milling time is 4 hours to obtain a composite powder;

[0035] Step 2: Encapsulate the prepared composite powder in a copper tubular thin-wall material sheath, and preheat it in an electric furnace, the sintering temperature is 550 degrees, and the heating time is 2 hours;

[0036] Step 3, the pressure is 10MPa-700MPa, the extrusion ratio is 4 / 1-50 / 1, and the extrusion speed is 2-10 mm / s. After hot extrusion, the sheath and burrs are removed, and carbon nanotube-reinforced a...

Embodiment 2

[0037] Embodiment 2 The difference between this embodiment and Embodiment 1 is that the weight percentage of carbon nanotubes in step 1 is 0.5%.

Embodiment 3

[0038] Embodiment 3 The difference between this embodiment and Embodiment 1 is that the weight percentage of carbon nanotubes in Step 1 is 1.0%.

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Abstract

The invention discloses a preparation method of a carbon nanotube reinforced aluminum base composite material. The preparation method comprises the following steps: a carbon nanotube, aluminum powder or aluminum ally powder and a process control agent are prepared to composite powder by ball milling; the composite powder is packed in a cover material, is heated to an appointed temperature for sintering, and is hotly extruded to prepare a composite material blank; and the cover material is stripped to obtain a target product. The preparation method adopts a thermal extrusion powder forming process, simplifies the technological flows of blank pressing, sintering and thermal extrusion molding in a traditional powder metallurgy process, realizes one-step molding, greatly improves the production efficiency, prevents the insulation time of a carbon nanotube and an aluminum matrix in a high-temperature area in a similar multi-step powder metallurgy process, prevents quick interface reaction of the carbon nanotube and the aluminum matrix, effectively controls effective interface bonding between the aluminum matrix and the carbon nanotube, is simple in preparation process, and broad in industrial application prospect, and effectively reduces the cost.

Description

technical field [0001] The invention specifically relates to a method for preparing a carbon nanotube-reinforced aluminum-aluminum matrix composite material, which belongs to the technical field of nanocomposite material preparation. Background technique [0002] Aluminum-based composite materials have the advantages of light weight, high strength, wear resistance and corrosion resistance, thermal conductivity and low thermal expansion coefficient. They are widely used in industries such as aerospace, automobile manufacturing, and electronic instruments. They are also hot topics in the research of new materials at home and abroad in recent years. . At the same time, as a one-dimensional nanomaterial, carbon nanotubes have a tensile strength of 50-200GPa, about 100 times that of steel, light weight, 1 / 6 of the density of steel, and an elastic modulus of about 1TPa. With excellent electrical and thermal conductivity, it is regarded as the most ideal composite material reinfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C47/14C22C49/06C22C49/14C22C101/10
Inventor 陈名海董占青裴久阳李清文
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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