Preparation method of elemental-copper-coated multiwalled carbon nanotube/aluminum-based composite semisolid-state blank

A technology of multi-walled carbon nanotubes and aluminum-based composite materials, applied in the field of material preparation, can solve the problems of lack of preparation and forming technology of carbon nanotube-reinforced aluminum-based composite materials, unfavorable performance improvement of composite materials, and easy agglomeration of carbon nanotubes , to achieve the effect of reducing the probability of reunion, low risk factor and low reaction temperature

Active Publication Date: 2017-01-25
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it can improve the compactness problem, carbon nanotubes are easy to agglomerate under rheological conditions, which is not good for the performance of composite materials.
[0010] Therefore, there is still a lack of a cost-effective carbon nanotube-reinforced aluminum matrix composite preparation and forming technology

Method used

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  • Preparation method of elemental-copper-coated multiwalled carbon nanotube/aluminum-based composite semisolid-state blank

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Multi-walled carbon nanotubes were ultrasonically pre-dispersed in pure nitric acid solution for 8 hours at 60°C. After cooling to room temperature, they were washed with deionized water, centrifuged until neutral, and then dried in a vacuum oven for later use. Copper nitrate and the above-mentioned dried multi-walled carbon nanotubes were used as raw materials, and were added into pure ethanol for ultrasonication for 40 minutes; wherein the molar ratio of multi-walled carbon nanotubes, copper nitrate and ethanol was 1:0.4:127, and the suspension of multi-walled carbon nanotubes was obtained. liquid; the suspension is introduced into the hydrothermal reaction kettle, wherein the volume of the suspension accounts for 25% of the volume of the reaction kettle. Then put it into the reaction furnace to heat, raise the temperature to 200°C at 3°C / min, keep it for 2 hours, then raise the temperature to 300°C at 3°C / min, and keep it for 8 hours; seal and cool to room temperature...

Embodiment 2

[0036] Multi-walled carbon nanotubes were ultrasonically pre-dispersed in pure nitric acid solution for 8 hours at 60°C. After cooling to room temperature, they were washed with deionized water, centrifuged until neutral, and then dried in a vacuum oven for later use. Copper nitrate and the above-mentioned dried multi-walled carbon nanotubes were used as raw materials, and were added into pure ethanol for ultrasonication for 50 minutes; wherein the molar ratio of carbon nanotubes, copper nitrate and ethanol was 1:0.6:127 to obtain a multi-walled carbon nanotube suspension; The suspension is introduced into a hydrothermal reaction kettle, wherein the volume of the suspension accounts for 25% of the volume of the reaction kettle. Then put it into the reaction furnace to heat, raise the temperature to 200°C at 5°C / min, keep it warm for 1h, then raise the temperature to 300°C at 3°C / min, keep it warm for 8h; seal and cool to room temperature, filter and dry at low temperature, then...

Embodiment 3

[0039] Multi-walled carbon nanotubes were ultrasonically pre-dispersed in pure nitric acid solution for 8 hours at 60°C. After cooling to room temperature, they were washed with deionized water, centrifuged until neutral, and then dried in a vacuum oven for later use. Copper nitrate and the above-mentioned dried multi-walled carbon nanotubes were used as raw materials, and were added into pure ethanol for ultrasonication for 60 minutes; wherein the molar ratio of multi-walled carbon nanotubes, copper nitrate and ethanol was 1:0.8:127, and the suspension of multi-walled carbon nanotubes was obtained. liquid; the suspension is introduced into the hydrothermal reaction kettle, wherein the volume of the suspension accounts for 25% of the volume of the reaction kettle. Then put it into the reaction furnace to heat, raise the temperature to 200°C at 3°C / min, keep it for 1h, then raise the temperature to 300°C at 3°C / min, keep it for 10h; seal and cool to room temperature, filter and ...

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Abstract

A preparation method of an elemental-copper-coated multiwalled carbon nanotube/aluminum-based composite semisolid-state blank includes: preparing an elemental-copper-coated multiwalled carbon nanotube; guiding aluminum alloy powder and the elemental-copper-coated multiwalled carbon nanotube into a ball milling crucible, and performing ball milling treatment under protection of argon; putting mixed powder into the crucible, using a muffle furnace to heat to 20-40 DEG C below a solid-phase line, transferring into an ultrasonic magnetic stirring furnace, continuing heating, controlling solid-phase rate to a certain range, vibrating and stirring at a low speed, feeding argon for protection, and controlling stirring time; pouring obtained size into a corresponding die, and cooling to obtain the semisolid-state blank. The preparation method has the advantages of simplicity, safety, low cost, easiness in operation and controllability.

Description

technical field [0001] The invention belongs to the technical field of material preparation. Background technique [0002] In recent years, the use of fibers or particles to strengthen aluminum alloys, the prepared aluminum matrix composites have attracted great attention and are widely used in aerospace due to their high specific strength, good electrical and thermal conductivity and low thermal expansion coefficient. , automobile manufacturing, electronic instruments and other fields. [0003] Carbon nanotubes are tubular objects rolled from graphite hexagonal networks. They have a unique nano-hollow structure, closed topological configuration and helical structure, and thus have a large number of special excellent properties, such as high strength, high elasticity, and high specificity. Surface area, heat resistance, corrosion resistance, thermal conductivity and electrical conductivity, etc., imply that carbon nanotubes have huge application space in material applicatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C21/00C22C49/06C22C49/14C22C47/04C22C101/10
CPCC22C1/101C22C21/00C22C47/04C22C49/06C22C49/14C22C1/12
Inventor 闫洪吴庆捷
Owner NANCHANG UNIV
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