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Device and method for in-situ preparation of refractory metal carbide nanowires/tubes by template method and thermal evaporation technology

A technology for in-situ preparation of refractory metals, applied in the fields of carbon compounds, chemical instruments and methods, nanotechnology, etc., can solve the problems of complex chemical composition, damage to matrix materials, corrosion, etc., to achieve simple preparation, reduce difficulty, and increase yield Effect

Active Publication Date: 2021-12-24
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nanowires prepared by the precursor impregnation pyrolysis process generate more gas during the pyrolysis process, and at the same time, the chemical composition is complex, causing damage and corrosion to the matrix material, etc.

Method used

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  • Device and method for in-situ preparation of refractory metal carbide nanowires/tubes by template method and thermal evaporation technology
  • Device and method for in-situ preparation of refractory metal carbide nanowires/tubes by template method and thermal evaporation technology
  • Device and method for in-situ preparation of refractory metal carbide nanowires/tubes by template method and thermal evaporation technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Step 1: Place the CNT in the corundum tube in the constant temperature zone of the horizontal CVD furnace, plug the tube plugs on both sides and fix the flange with clamps; the tube plugs have through holes;

[0030] Step 2: Open the vacuum pump valve and start the vacuum pump, pump the furnace chamber to negative pressure, and close the vacuum valve. If the pressure of the furnace chamber changes for a long time, it means that the airtightness is good, and proceed to the next step; Check the sealing ring;

[0031] Step 3: Open the valve of the carrier gas pipe 2, feed inert gas and hydrogen, adjust the pressure value of the furnace chamber to normal pressure, and open the tail gas valve; at the same time, start the powder feeder 4 to pass the refractory metal carbide precursor through The powder container 1 enters the corundum tube of the horizontal CVD furnace along with the inert gas;

[0032] The inert gas is argon or nitrogen;

[0033] The flow of the inert gas i...

Embodiment 2

[0037] Step 1: Place the CNT in the corundum tube in the constant temperature zone of the horizontal CVD furnace, plug the tube plugs on both sides and fix the flange with clamps; the tube plugs have through holes;

[0038] Step 2: Open the vacuum pump valve and start the vacuum pump, pump the furnace chamber to negative pressure, and close the vacuum valve. If the pressure of the furnace chamber changes for a long time, it means that the airtightness is good, and proceed to the next step; Check the sealing ring;

[0039] Step 3: Open the valve of the carrier gas pipe 2, feed inert gas and hydrogen, adjust the pressure value of the furnace chamber to normal pressure, and open the tail gas valve; at the same time, start the powder feeder 4 to pass the refractory metal carbide precursor through The powder container 1 enters the corundum tube of the horizontal CVD furnace along with the inert gas;

[0040] The inert gas is argon or nitrogen;

[0041] The flow of the inert gas is ...

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Abstract

The invention relates to a device and method for in-situ preparation of refractory metal carbide nanowires / tubes by template method and thermal evaporation technology. The template used is carbon nanotubes (CNT), and the nanotubes are placed in a horizontal tube furnace, and then Evaporate the refractory metal carbide precursor into a tube furnace, and at a certain temperature, use argon or nitrogen as the dilution gas and carrier gas, and then reduce it with hydrogen to prepare refractory metal carbide nanowires in situ / Tube. The method of the invention is simple to prepare, has no pollution, is safe and stable, can greatly increase the output of the carbide nanowire tube, and effectively avoids damage to the modified matrix due to the introduction of external factors. It can be widely used in ceramic matrix composite materials (carbon / carbon, carbon / ceramic, magnesium-based, aluminum-based composite materials), resin-based composite materials, field emitter shoe materials and hard alloys, and has good economic and social benefits .

Description

technical field [0001] The invention belongs to the application of thermal evaporation technology and template method in situ preparation of refractory metal carbide nanowires / tubes in the technical field of composite materials, functional materials and alloys, and relates to a template method and thermal evaporation technology in situ preparation of refractory metal carbides Nanowire / tube devices and methods. Background technique [0002] Refractory metal carbide nanomaterials have the characteristics of high melting point, high specific strength and specific modulus at high temperature, good microwave absorption performance, excellent thermal conductivity, strong chemical stability, etc., and are widely used in aviation, military, medicine and construction fields. Carbide is a binary compound formed by carbon and an element (except hydrogen) with a smaller or similar electronegativity than it. It is divided into metal carbide and non-metal carbide from the properties of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/914B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B32/914C01P2004/03C01P2004/61
Inventor 付前刚闫宁宁史小红李贺军
Owner NORTHWESTERN POLYTECHNICAL UNIV
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