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Method for preparing carbon nanotube reinforcing composite clad layers on surfaces of titanium alloys

A carbon nanotube, enhanced composite technology, applied in the direction of metal material coating process, coating, etc., can solve the problems of complex method and high cost, and achieve the effect of simple operation method, low cost, and improved tolerance.

Inactive Publication Date: 2020-01-14
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although coating on the surface of carbon nanotubes or graphene can prevent the laser cladding process from destroying the structure of carbon nanotubes or graphene, the methods of surface coating include electroplating, chemical plating, chemical vapor deposition (CVD) or physical vapor deposition ( PVD), however, these methods are complex and costly

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  • Method for preparing carbon nanotube reinforcing composite clad layers on surfaces of titanium alloys
  • Method for preparing carbon nanotube reinforcing composite clad layers on surfaces of titanium alloys

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A surface modification method of titanium alloy using carbon nanotubes includes the following steps:

[0047] S1. Dispersion treatment of carbon nanotubes: first, prepare a 10g / L carboxymethyl cellulose aqueous solution, and then gradually add carbon nanotubes under the agitation of a magnetic stirrer until the concentration is 10g / L, and stir well. Disperse by ultrasonic vibration for 1 h to obtain a carbon nanotube solution.

[0048] S2. The configuration of the cladding material: add nickel-based self-fluxing alloy powder with a distribution size of 40μm-100μm into the dispersion of carbon nanotubes, the mass ratio of carbon nanotubes to nickel-based alloy powder is 1:20, and magnetically stirred The mixing is uniform, and the carbon nanotubes are fully coated on the surface of the nickel-based alloy powder. After the mixing is uniform, it is taken out and dried at 55°C.

[0049] S3. Immerse the polished TC4 titanium alloy into the carbon nanotube solution uniformly disper...

Embodiment 2

[0054] A surface modification method of titanium alloy using carbon nanotubes includes the following steps:

[0055] S1. Dispersion treatment of carbon nanotubes: first, prepare 15g / L carboxymethyl cellulose aqueous solution, and then gradually add carbon nanotubes under the agitation action of a magnetic stirrer until the concentration is 20g / L, and stir well. Disperse by ultrasonic vibration for 1 h to obtain a carbon nanotube solution.

[0056] S2. The configuration of the cladding material: add nickel-based self-fluxing alloy powder with a distribution size of 40μm-100μm into the dispersion of carbon nanotubes, the mass ratio of carbon nanotubes to nickel-based alloy powder is 1:20, and magnetically stirred The device is evenly mixed, and the carbon nanotubes are fully coated on the surface of the nickel-based alloy powder. After the mixture is evenly mixed, it is taken out and dried at 55°C;

[0057] S3. Immerse the polished TC4 titanium alloy into the carbon nanotube solution ...

Embodiment 3

[0062] A surface modification method of titanium alloy using carbon nanotubes includes the following steps:

[0063] S1. Dispersion treatment of carbon nanotubes: first configure 10g / L carboxymethyl cellulose organic dispersant, and then gradually add carbon nanotubes under the agitation of a magnetic stirrer until the concentration is 10g / L, and stir well. Then use ultrasonic vibration to disperse for 1 hour.

[0064] S2. The configuration of the cladding material: add nickel-based self-fluxing alloy powder with a distribution size of 40μm-100μm into the dispersion of carbon nanotubes, the mass ratio of carbon nanotubes to nickel-based alloy powder is 1:20, and magnetically stirred The mixing is uniform, and the carbon nanotubes are fully coated on the surface of the nickel-based alloy powder. After the mixing is uniform, it is taken out and dried at 55°C.

[0065] S3. Laser cladding: such as figure 1 As shown, under the protection of 15L / min argon gas, the powder in step S2 is tra...

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Abstract

The invention provides a method for preparing carbon nanotube reinforcing composite clad layers on the surfaces of titanium alloys. Carbon nanotube dispersion liquid is prepared; one part of the carbon nanotube dispersion liquid is uniformly mixed with nickel base self-fluxing alloy powder for drying to prepare mixed powder; the other part of the carbon nanotube dispersion liquid is coated on thesurfaces of titanium alloy basal bodies to obtain titanium alloy basal bodies prearranged with carbon nanotubes on the surfaces; and clad layers are formed on the surfaces of the titanium basal bodiesprearranged with the carbon nanotubes on the surfaces by the mixed powder through laser cladding by adopting a coaxial powder feeding mode. The wear resistance, the anti-attrition performance, the hardness and the high-temperature resistance of the clad layers on the surfaces of the titanium alloys can be improved. The method is simple in operation, excellent in process repeatability and lower incost, and can be widely used for surface treatment of the titanium alloys.

Description

Technical field [0001] The present disclosure belongs to the field of laser surface modification, and relates to a method for preparing a carbon nanotube reinforced composite cladding layer on the surface of a titanium alloy. Background technique [0002] The statements here only provide background information related to the present disclosure, and do not necessarily constitute prior art. [0003] Titanium alloy has the advantages of high specific strength, good corrosion resistance and good high temperature oxidation. It is widely used in aviation, navigation, and various precision machinery industries. However, titanium alloys also have some defects. For example, titanium alloys have lower hardness, poor wear resistance and poor high-temperature oxidation resistance. These defects limit the use of titanium alloys in some extreme situations. Therefore, without changing the properties of the substrate, the preparation of coatings with high hardness, good wear resistance and high t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
CPCC23C24/103
Inventor 刘树帅王新洪赵冠琳宋继军应卫龙
Owner SHANDONG UNIV
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