Method for gradient and length-diameter ratio CNTs reinforced copper-based composite materials of laser-induction composite melting deposition

A copper-based composite material, fusion deposition technology, applied in the field of rapid manufacturing, can solve problems such as high-strength and high-conductivity copper alloys, easy agglomeration of carbon nanotubes, complex processes, etc., to improve high-temperature oxygen resistance and aspect ratio distribution Uniformity, the effect of saving precious materials

Inactive Publication Date: 2013-06-26
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above three methods all have problems in the preparation process: carbon nanotubes are easy to agglomerate, uneven distribution, poor wettability with copper matrix, complicated process, and difficulty in preparing large-volume carbon nanotube-reinforced copper-based composite materials. It is difficult to prepare a copper-based composite material with a gradient distribution of carbon nanotube aspect ratio, which does not give full play to the excellent performance of carbon nanotubes, and it is difficult to meet the needs of the industrial field for high-strength and high-conductivity copper alloys with gradient properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Laser-induction composite melting deposition is used to prepare CNTs-reinforced copper matrix composite parts with gradient aspect ratio. The aspect ratio of CNTs is distributed along the thickness direction of the material in a gradient of 50 to 5000, and the content of CNTs in each layer is 5wt.% The part is a hollow cylinder: the inner diameter and outer diameter are 100mm and 103mm, respectively, and the height is 10.45mm. The thickness of the CAD two-dimensional sheet obtained by slicing technology is 0.95mm. The aspect ratio of the CNTs in the first layer is 50. The aspect ratio of the CNTs in one layer is increased by 495 compared to the aspect ratio of the CNTs in the previous layer. A total of 11 layers are deposited. The specific implementation process is as follows:

[0022] (1) Screening of carbon nanotubes: The method of rotating electrophoresis is used to screen and obtain carbon nanotubes with a gradient distribution of aspect ratios, specifically:

[0023] 1)...

Embodiment 2

[0031] Laser-induction composite melting deposition is used to prepare CNTs-reinforced copper-based composite parts with gradient aspect ratio. The aspect ratio of CNTs is distributed along the thickness direction of the material with a gradient of 50 to 5000, and the content of CNTs in each layer is 8wt.% The part is a hollow cylinder: the inner diameter and outer diameter are respectively 200mm and 205mm, and the height is 53.55mm. The thickness of the CAD two-dimensional sheet obtained by slicing technology is 1.05mm. The aspect ratio of the CNTs in the first layer is 100. The aspect ratio of CNTs in one layer is increased by 98 compared with the aspect ratio of CNTs in the previous layer. A total of 51 layers are deposited. The specific implementation process is as follows:

[0032] (1) Screening of carbon nanotubes: The method of rotating electrophoresis is used to screen and obtain carbon nanotubes with a gradient distribution of aspect ratios, specifically:

[0033] 1) Using...

Embodiment 3

[0041] Laser-induction composite melting deposition is used to prepare CNTs-reinforced copper matrix composite parts with gradient aspect ratio. The aspect ratio of CNTs is distributed along the thickness direction of the material in a gradient of 50 to 5000, and the content of CNTs in each layer is 10wt.% The part is a hollow cylinder: the inner diameter and the outer diameter are respectively 300mm and 310mm, and the height is 104.03mm. The thickness of the CAD two-dimensional sheet obtained by slicing technology is 1.03mm. The aspect ratio of the CNTs in the first layer is 200. The aspect ratio of CNTs in one layer is increased by 48 compared with the aspect ratio of CNTs in the previous layer. A total of 101 layers are deposited. The specific implementation process is as follows:

[0042] (1) Screening of carbon nanotubes: The method of rotating electrophoresis is used to screen and obtain carbon nanotubes with a gradient distribution of aspect ratios, specifically:

[0043] 1)...

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Abstract

The invention discloses a method for gradient and length-diameter ratio CNTs reinforced copper-based composite materials of laser-induction composite melting deposition. The method for the gradient and length-diameter ratio CNTs reinforced copper-based composite materials of the laser-induction composite melting deposition is characterized by comprising a first step of adopting a method of rotating electrophoresis to carry out screening on carbon nano tubes, a second step of respectively and evenly mixing the screened and obtained carbon nano tubes with copper alloy powder on a ball grinding mill according to a length-diameter ratio in a gradient-increase mode, and a third step of adopting the method of laser-induction composite melting deposition to prepare the CNTs reinforced copper matrix composite materials of the length-diameter ratio. The method for the gradient and length-diameter ratio CNTs reinforced copper-based composite materials of the laser-induction composite melting deposition has the advantages that the carbon nano tubes are screened and obtained through a method of rotating the electrophoresis, chemical nickel plating processing is carried out on copper matrix composite powder distributed of the CNTs in a disperse mode, high temperature oxygen of the copper matrix composite powder and wetting performance of the CNTs and a copper alloy are improved, gradient distribution of the CNTs which are different in length-diameter ratio in the copper matrix composite materials is achieved, valuable materials are notably saved, manufacturing cost is reduced, and a manufacturing cycle is shortened.

Description

technical field [0001] The invention belongs to the field of rapid manufacturing technology, and in particular relates to a method for laser-induction composite melting deposition of CNTs with gradient aspect ratios to reinforce copper-based composite materials. Background technique [0002] Copper alloy has excellent electrical conductivity, thermal conductivity, corrosion resistance and good processing performance, and has a wide range of applications in the fields of integrated circuit lead frames, high-speed iron contact wires, and continuous casting molds. However, the insufficient strength, high-temperature softening temperature and wear resistance of copper alloy greatly limit its application in industry. As we all know, there is a contradictory relationship between the high strength and high conductivity of copper alloys. Therefore, how to greatly improve the strength, hardness, wear resistance and corrosion resistance of copper alloys on the premise of reducing the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105C22C47/14C22C49/02C22C49/14
Inventor 周圣丰戴晓琴张天佑吴超邵志松王春霞
Owner NANCHANG HANGKONG UNIVERSITY
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