A method for laser-induction composite cladding of carbon nanotubes to reinforce iron-rich porous composite materials

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

Inactive Publication Date: 2016-05-11
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 performance of the test is: 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 wi...

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

A method for laser-induction composite cladding carbon nanotubes to reinforce iron-rich porous composite materials, the method is characterized by: (1) mixing copper alloy powder, iron alloy powder and carbon nanotubes, adding them to acrylic resin to prepare slurry (2) The slurry is uniformly mixed by a planetary ball mill, dried and ground into a Cu-Fe-based composite powder with uniform distribution of carbon nanotubes; (3) The method of laser-induction composite cladding is used to prepare carbon nanotubes on the surface of the substrate. Tube-reinforced Cu-Fe-based composites were subjected to selective electrochemical corrosion in nitric acid solution to obtain high-strength porous Fe-rich composites with three-dimensional structure. The invention utilizes carbon nanotubes with a high melting point to suppress the convection of molten Cu-Fe-based composite powder, reduce the moving speed and particle size of spherical Fe-rich particles, and improve the structure segregation and structural delamination of Cu-Fe-based composite materials. Therefore, the present invention can prepare crack-free high-strength porous Fe-rich composite material with uniform distribution of CNTs under the condition 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 Patents(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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