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Metallic surface modification process

A metal surface modification technology, applied in metal material coating process, coating, etc., can solve the problems of many control factors, and achieve the effect of simple and easy control of the process, less investment in equipment, and improved technical indicators

Inactive Publication Date: 2009-09-30
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of method is related to the coating wear resistance, hardness, thickness, density and the degree of dispersion and mixing of carbon nanotubes and the form in the composite coating and the binding force of other elements. There are many control factors, and it cannot make the coating ordered alignment of carbon nanotubes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: Grind the carbon nanotube raw material prepared by the catalytic chemical vapor deposition method with an iron-containing catalyst to 350 mesh; take epoxy resin and xylene solvent to prepare the composite layer substrate according to the ratio of 1:3 by weight, and then mix the above The ground carbon nanotubes and the prepared composite layer matrix are mixed according to the weight ratio of 0.05:1 to form a melt, the viscosity of the melt is 70Pa.s, and 60w / cm 2 Disperse the melt with high-energy ultrasonic waves for 30 minutes to fully disperse the carbon nanotubes in the melt; spread the above melt on the surface of the metal plate to obtain a suspension layer containing carbon nanotubes with a thickness of 0.5mm on the metal surface, and then introduce the above metal plate Magnetic field for magnetophoretic deposition, the magnetic field strength is 300mT, the magnetic field direction is parallel to the carbon nanotube suspension layer, the magnetopho...

Embodiment 2

[0018] Embodiment 2: Take the carbon nanotube raw material prepared by the catalytic chemical vapor deposition method containing iron catalyst and grind to 400 mesh; Take epoxy resin and xylene solvent to prepare the composite layer substrate according to the ratio of 1:2 by weight, and then mix the above The ground carbon nanotubes and the prepared composite layer matrix are mixed according to the weight ratio of 0.1:1 to form a melt. The viscosity of the melt is 100Pa.s. Use 30w / cm 2 Disperse the melt with high-energy ultrasonic waves for 60 minutes to fully disperse the carbon nanotubes in the melt; spread the above melt on the surface of the metal plate to obtain a suspension layer containing carbon nanotubes with a thickness of 1mm on the metal surface, and then introduce the above metal plate into the magnetic field Carry out magnetophoretic deposition, the magnetic field intensity is 400mT, the magnetic field direction is parallel to the carbon nanotube suspension layer,...

Embodiment 3

[0019] Embodiment 3: Take the carbon nanotube raw material prepared by the catalytic chemical vapor deposition method containing iron catalyst and grind to 450 mesh; Take epoxy resin and xylene solvent to prepare the composite layer substrate according to the ratio of 1:1 by weight, and then mix the above The ground carbon nanotubes and the prepared composite layer matrix are mixed according to the ratio of 0.15:1 by weight to form a melt, the melt viscosity is 150Pa.s, and 50w / cm 2 The high-energy ultrasonic wave disperses the molten material for 40 minutes, so that the carbon nanotubes are fully dispersed in the molten material; the above-mentioned molten material is spread on the surface of the metal plate, so that a suspension layer containing carbon nanotubes with a thickness of 2mm is obtained on the metal surface, and then the above-mentioned metal plate is introduced into a magnetic field for Magnetophoretic deposition, the magnetic field strength is 500mT, the magnetic...

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Abstract

The invention relates to a metal surface modification method, which belongs to the technical field of metal materials and is used for solving the problems of high production cost, complex process, difficult control and the like of metal surface composite carbon nanotube layer technology. The technical plan is: select the carbon nanotube raw material prepared by the catalytic chemical vapor deposition method containing iron catalyst, go through the steps of raw material grinding, deployment of carbon nanotube composite layer melt, magnetophoretic deposition of oriented carbon nanotube suspension layer, rolling and cold embedding, etc. , a composite layer with 0.05-1.0mm aligned carbon nanotubes is obtained on the metal surface. The method of the invention can orderly orient the carbon nanotubes of the composite layer on the metal surface, and can adjust the thickness of the composite layer according to the application purpose. The surface layer of ordinary metal materials is endowed with the excellent characteristics of carbon nanotubes, so that its technical indicators such as oxidation resistance, wear resistance, self-lubrication, and strength are greatly improved. Compared with the prior art, the method of the invention has low cost of production raw materials, simple and easy-to-control process, less investment in equipment, and is suitable for continuous batch production.

Description

technical field [0001] The invention relates to a method for preparing a metal material, in particular to a metal surface modification method for compounding a carbon nanotube layer on a metal surface, and belongs to the technical field of metal materials. Background technique [0002] Oxidation and corrosion of metal surfaces not only bring us damage to equipment and a large amount of waste of materials, but also bring pollution to the environment. The metal surface has better tensile, compressive and flexural properties, good wear resistance, oxidation resistance, and self-lubricating properties, which means less material consumption and is more environmentally friendly. [0003] Carbon nanotubes are seamless nanoscale tubes formed by single-layer or multi-layer graphite sheets curled around the central axis at a certain helix angle. Carbon nanotubes have strong tensile, compressive and flexural capabilities. The tensile strength of carbon nanotubes is about 100 times tha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C26/00
Inventor 侯国宪张金梅
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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