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Method for preparing carbon nanotube-reinforced iron-rich porous composite material through laser-induction composite cladding

A porous composite material and carbon nanotube technology, which is applied in the field of laser-induction composite cladding carbon nanotube reinforced iron-rich porous composite materials, can solve problems that have not been reported in the literature, and achieve improved structural delamination, uniform distribution of CNTs, Reduce the effect of motion speed and particle size

Inactive Publication Date: 2014-10-22
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, looking at the research progress of porous metal materials at home and abroad, the preparation of iron-rich porous composite materials reinforced by carbon nanotubes has not been done by using the method of laser-induction composite cladding, combined with the difference in electrochemical corrosion properties of copper and iron. see literature report

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The method of laser-induction composite cladding is used on the surface of A3 steel to prepare carbon nanotube reinforced iron-rich porous composite material. The performance of the test is: the average pore size is 2nm, the tensile strength is 450MPa, the electrical conductivity is 70% IACS, and the microstructure is dense. , no pores and no cracks, forming a metallurgical bond with the base A3 steel, the specific implementation process is as follows:

[0018] (1) Mix Cu alloy powder, Fe alloy powder and carbon nanotube powder at a mass ratio of 3:2:0.13, then add them to acrylic resin, and prepare a slurry by mechanical stirring. Among them, the mass of acrylic resin and mixed powder The ratio is 2:1, the chemical composition of copper alloy powder is (mass percentage): 90% Cu and 10% Ni, the chemical composition of iron alloy powder is (mass percentage): 85% Fe, 5% Cr, 3% Ni, 4 %Si, 2.5%B and 0.5%C; the carbon nanotubes used are multi-walled carbon nanotubes with a p...

Embodiment 2

[0023] The method of laser-induction composite cladding was used on the surface of 45 steel to prepare carbon nanotube reinforced iron-rich porous composite material. The tested properties are: the average pore diameter is 5nm, the tensile strength is 400MPa, the electrical conductivity is 65% IACS, and the microstructure is dense. , no pores and no cracks, and form a metallurgical bond with the base 45 steel. The specific implementation process is as follows:

[0024] (1) Mix Cu alloy powder, Fe alloy powder and carbon nanotube powder at a mass ratio of 3:2:0.13, then add them to acrylic resin, and prepare a slurry by mechanical stirring. Among them, the mass of acrylic resin and mixed powder The ratio is 2:1, the chemical composition of copper alloy powder is (mass percentage): 90% Cu and 10% Ni, the chemical composition of iron alloy powder is (mass percentage): 85% Fe, 5% Cr, 3% Ni, 4 %Si, 2.5%B and 0.5%C; the carbon nanotubes used are multi-walled carbon nanotubes with a ...

Embodiment 3

[0029] On the surface of 304 stainless steel, the method of laser-induction composite cladding was used to prepare carbon nanotube reinforced iron-rich porous composite materials. The performance of the test is: the average pore size is 10nm, the tensile strength is 360MPa, the electrical conductivity is 60% IACS, and the microstructure is dense. , no pores and no cracks, and form a metallurgical bond with the base 304 stainless steel. The specific implementation process is as follows:

[0030] (1) Mix Cu alloy powder, Fe alloy powder and carbon nanotube powder at a mass ratio of 3:2:0.13, then add them to acrylic resin, and prepare a slurry by mechanical stirring. Among them, the mass of acrylic resin and mixed powder The ratio is 2:1, the chemical composition of copper alloy powder is (mass percentage): 90% Cu and 10% Ni, the chemical composition of iron alloy powder is (mass percentage): 85% Fe, 5% Cr, 3% Ni, 4 %Si, 2.5%B and 0.5%C; the carbon nanotubes used are multi-walle...

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Abstract

The invention provides a method for preparing a carbon nanotube-reinforced iron-rich porous composite material through laser-induction composite cladding. The method is characterized by comprising the following steps: (1) mixing copper alloy powder, ferroalloy powder and a carbon nanotube and adding the obtained mixture into an acrylic resin to prepare slurry; (2) uniformly mixing the slurry by using a planetary ball mill, carrying out drying and then carrying out grinding to obtain carbon nanotube uniformly-distributed Cu-Fe-based composite powder; and (3) preparing a carbon nanotube-reinforced Cu-Fe-based composite material on the surface of a substrate through laser-induction composite cladding and carrying out selective electrochemical corrosion in a nitric acid solution so as to obtain the high-strength porous iron-rich composite material with a three-dimensional structure. According to the invention, the carbon nanotube with a high-melting point is used to inhibit convection of molten Cu-Fe-based composite powder, reduce the movement speed and particle size of spherical Fe-rich particles and improve structural segregation and layering of the Cu-Fe-based composite material. Thus, the crack-free high-strength porous iron-rich composite material with uniformly distributed carbon nanotubes can be prepared under the conditions of high efficiency and low cost.

Description

technical field [0001] The invention belongs to the technical field of new material preparation, and relates to a method for laser-induction composite cladding carbon nanotubes to reinforce iron-rich porous composite materials. Background technique [0002] Porous metals are composed of metal skeletons and pores, and have basic metal properties such as electrical conductivity, plasticity, toughness, and weldability of metal materials. Compared with dense metal materials, due to the large number of pores in the porous metal, the porous metal has excellent characteristics, such as small specific gravity, large specific surface, good energy absorption, low thermal conductivity, good permeability, and electromagnetic wave absorption. sex etc. Therefore, porous metal materials are widely used in the processes of separation, filtration, catalysis, noise reduction, shock absorption, shielding and heat exchange in aerospace, petrochemical, metallurgical machinery, medicine and cons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C49/02C22C47/14C25F3/14C22C101/10
Inventor 周圣丰戴晓琴王贵容张泽忠刘瑾怡刘佳刘俊哲
Owner NANCHANG HANGKONG UNIVERSITY
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