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Uniformity control method for growing carbon nano tubes in titanium alloy shading cover

A carbon nanotube and control method technology, applied in metal material coating process, gaseous chemical plating, coating and other directions, can solve the problems of poor metal valence bond state and carbon wettability, low melting point, complex structure, etc. Achieve the effect of not easy to fall off as a whole, increase the contact area, and reduce the growth temperature

Active Publication Date: 2016-05-04
BEIJING INST OF CONTROL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the structure of the titanium alloy material with a definite structure cannot be bent arbitrarily, so it cannot be grown by this technology.
[0005] In particular, the titanium alloy shading is a structural part with a large volume and a complex structure, and due to the low melting point of the titanium material, the poor wettability of the metal valence bond state and carbon, etc., it has always been considered by the international academic and industrial circles. The forbidden zone for growing carbon nanotubes is hardly reported in the published literature

Method used

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  • Uniformity control method for growing carbon nano tubes in titanium alloy shading cover

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The titanium alloy light shield (the inner surface area is 10000 square millimeters) is heat-treated for 0.5 hours in process gas (ethanol 50% (volume fraction), hydrogen (30%), nitrogen (20%)) at 700 ° C, on its surface Regular carbon-titanium compound-containing protrusions are formed. Each protrusion has a diameter of 0.01 μm and a height of 0.3 μm. The density is 100 / square micron. Then heat treatment in oxygen at 300°C for 3 hours.

[0035] Immerse the surface-treated titanium alloy light shield in tetraethyl orthosilicate for 0.5 hours. Then, 0.1 liter of water was directed into the inner cavity of the titanium alloy light shield, heated to 100°C, and a silicon oxide layer with a thickness of 0.1 micron was formed on the surface of the inner cavity of the titanium alloy light shield.

[0036] Put the titanium alloy shading cover after the above treatment into a large cavity reactor (3 times the diameter of the titanium alloy shading cover), hang it in the air all...

Embodiment 2

[0039] The titanium alloy light shield (with an inner surface area of ​​1000 square millimeters) was heat-treated at 700°C for 3 hours in a process gas (ethanol 90% (volume fraction), hydrogen (5%), argon (5%)), and on its surface Regular carbon-titanium compound-containing protrusions are formed. Each protrusion is 0.1 μm in diameter and 2 μm in height. The density is 200 / square micron. Then heat treatment in oxygen at 500°C for 0.5 hours.

[0040] Immerse the titanium alloy light shield with the preliminary surface treatment in ethyl orthotitanate for 2 hours. Then 1 liter of water was directed into the inner cavity of the titanium alloy light shield, heated to 150° C., and a titanium oxide layer with a thickness of 5 microns was formed on the surface of the inner cavity of the titanium alloy light shield.

[0041] Put the titanium alloy shading cover after the above treatment into a large cavity reactor (5 times the diameter of the titanium alloy shading cover), hang it ...

Embodiment 3

[0044] The titanium alloy light shield (with an inner surface area of ​​5000 square millimeters) was heat-treated at 700°C for 3 hours in a process gas (ethanol 70% (volume fraction), hydrogen (25%), nitrogen (5%)), and on its surface Regular carbon-titanium compound-containing protrusions are formed. Each protrusion has a diameter of 0.3 microns and a height of 10 microns. The density is 150 / square micron. Then heat treatment at 500°C for 0.5 hours in air.

[0045] Immerse the surface-treated titanium alloy gobo in ethyl titanate for about 1 hour. Then, 1 liter of water vapor was directionally introduced into the inner cavity of the titanium alloy light shield, heated to 150°C, and a titanium oxide layer with a thickness of 5 microns was formed on the surface of the inner cavity of the titanium alloy light shield.

[0046] Put the titanium alloy shading cover after the above treatment into a large cavity reactor (5 times the diameter of the titanium alloy shading cover), h...

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Abstract

The invention relates to a uniformity control method for growing carbon nano tubes in a titanium alloy shading cover. The uniformity control method includes the steps that (1) the titanium alloy shading cover is subject to heat treatment under the condition that high temperature and process gas exist, regular protrusions containing carbon-titanium compounds are formed on the surface of the titanium alloy shading cover, and then oxidation is carried out; (2) the titanium alloy shading cover is soaked into pure tetraethoxysilane or titanium ethoxide liquid for reacting, then water or water vapor is led into an inner cavity to be heated, and a silicon oxide or titanium oxide layer is formed on the surface of the inner cavity of the titanium alloy shading cover; (3) the titanium alloy shading cover is placed into a cavity reactor with a feeding pipe, and then the cavity reactor is heated; (4) a carbon source and a metal precursor are led into the cavity reactor through a feeding pipe at the same time, and carbon nano tube arrays are decomposed and precipitated at different positions of the inner cavity of the titanium alloy shading cover; and (5) a plasma field is applied to the outer side of the reactor simultaneously, leading of the carbon source is stopped after reacting, a temperature rise system is stopped, inert gas is led in, and final products are taken out after the temperature falls to the room temperature.

Description

technical field [0001] The invention relates to a method for growing a carbon nanotube array inside a titanium alloy light shield. Background technique [0002] Carbon nanotubes are nanomaterials with a huge aspect ratio, and the multi-walled carbon nanotubes themselves appear black. When carbon nanotubes form a regular array structure, the nanoscale pores between them have good light-absorbing properties. That is, photons will be reflected countless times in the carbon nanotube array, which is much larger than its free path of motion, but cannot escape from the array. Therefore, the carbon nanotube array is uniformly grown inside the titanium alloy sunshield. When the titanium content of the titanium-containing material is greater than 70%, this type of ultra-light, ultra-ductile and corrosion-resistant material is used in many aircrafts that have strict weight requirements. It has irreplaceable functions with motor vehicles and other fields. The carbon nanomaterials on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C16/26C23C16/02C23C16/50
CPCC23C16/0218C23C16/0272C23C16/26C23C16/50
Inventor 郝云彩骞伟中余成武于翔杨淑慧黄佳琦梁士通
Owner BEIJING INST OF CONTROL ENG
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