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Preparation method of elemental-copper-coated crystal whisker carbon nanotube/magnesium-based composite semisolid-state blank

A technology of carbon nanotubes and composite materials, applied in the field of material preparation, to achieve the effects of low risk factor, low reaction temperature and good interface

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

[0012] In order to overcome the technical difficulties in the preparation and molding of traditional carbon nanotube composite materials, the present invention intends to provide a new preparation and molding technology for semi-solid blanks of CNT magnesium-based materials

Method used

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  • Preparation method of elemental-copper-coated crystal whisker carbon nanotube/magnesium-based composite semisolid-state blank

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Whiskered 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 dried in a vacuum oven for later use. Copper nitrate and the above-mentioned dried whisker carbon nanotubes are used as raw materials, and added to pure ethanol for 40 minutes of ultrasonication; wherein the molar ratio of whisker carbon nanotubes, copper nitrate and ethanol is 1:0.4:127, and the suspension of whisker carbon nanotubes is 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, filter and dry at low temperatur...

Embodiment 2

[0038] Whisker carbon nanotube-walled carbon nanotubes were ultrasonically pre-dispersed in pure nitric acid solution for 8 hours at 60°C, cooled to room temperature, washed with deionized water, centrifuged until neutral, and then dried in a vacuum oven for use. Copper nitrate and the above-mentioned dried whisker carbon nanotubes are used as raw materials, and added to pure ethanol for 50 minutes of ultrasonication; wherein the molar ratio of whisker carbon nanotubes, copper nitrate and ethanol is 1:0.6:127, and the suspension of whisker carbon nanotubes is 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 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...

Embodiment 3

[0041] Whiskered 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 dried in a vacuum oven for later use. Copper nitrate and the above-mentioned dried carbon nanotubes were used as raw materials, and were added into pure ethanol for ultrasonication for 60 minutes; wherein the molar ratio of whisker carbon nanotubes, copper nitrate and ethanol was 1:0.8:127 to obtain whisker carbon nanotube suspensions; 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 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 dry at low temperature, then put it into a corundum cruc...

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Abstract

A preparation method of an elemental-copper-coated crystal whisker carbon nanotube / magnesium-based composite semisolid-state blank includes: preparing an elemental-copper-coated crystal whisker carbon nanotube; guiding aluminum alloy powder and the elemental-copper-coated crystal whisker 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] As a metal-based structural material, magnesium-based composites have the characteristics of light weight, high specific strength and specific stiffness, good electrical and thermal conductivity, damping performance, and excellent casting performance, making them have a larger role in metal-based composites. Potential application prospects. However, magnesium alloys also have disadvantages such as small elastic modulus, low strength, high thermal expansion coefficient, poor dimensional stability at high temperature, and poor wear resistance, which make magnesium alloys have great limitations as structural materials. It is difficult to meet the demand for high-strength structural materials. [0003] So far, magnesium alloy composite reinforcement methods mainly include fiber reinforcement and particle reinforcement. The performance of composite material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C49/04C22C49/14C22C47/04C22C101/10
CPCC22C47/04C22C49/04C22C49/14
Inventor 闫洪吴庆捷
Owner NANCHANG UNIV
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