Method for preparing diamond/copper thermally conductive composite parts by 3D printing near net shape

A heat-conducting composite material and 3D printing technology, which is applied to ceramic products, other household appliances, household appliances, etc., can solve problems such as difficult preparation and control of the spatial structure of diamond preforms, and achieve reduction of preparation costs, improvement of designability, and The effect of improving work efficiency

Active Publication Date: 2020-11-06
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the spatial structure of the diamond prefabricated body in the diamond-reinforced metal matrix composite parts is difficult to prepare and difficult to control. By using the combination of 3D printing technology and pressure infiltration technology, the spatial structure is accurate and the shape and size can be changed flexibly. The diamond / copper composite parts with dense structure only need a small amount of finishing in the later stage, which reduces the amount of material processing and reduces the cost

Method used

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  • Method for preparing diamond/copper thermally conductive composite parts by 3D printing near net shape
  • Method for preparing diamond/copper thermally conductive composite parts by 3D printing near net shape

Examples

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Embodiment 1

[0041] A method for preparing diamond / copper heat-conducting composite parts by 3D printing near-net shape, comprising the following steps;

[0042] (1) Prepare the cube parts, complete the 3D CAD modeling of the parts, use the 3D CAD models of the parts for layering processing and obtain the discretized 2D layer information.

[0043] (2) Configure 3D printing raw materials according to the mass ratio of diamond: ABS resin: aluminum phosphate: EMA = 50:35:5:5. The toughening agent was ethylene methyl acrylate copolymer (EMA).

[0044](3) Extrude the obtained 3D printing raw materials into filaments with a diameter of 2.00±0.05mm by using a twin-screw extruder. The extruded filaments are water-cooled and air-dried to make 500mm-long thin rods for use .

[0045] (4) According to the two-dimensional layer information obtained in step (1), use the 3D printer to print the parts layer by layer using the filament manufacturing method obtained in step (3) to obtain a prefabricated b...

Embodiment 2

[0049] A method for preparing diamond / copper thermally conductive composite parts by 3D printing, comprising the following steps:

[0050] (1) Prepare the cylindrical part, complete the 3D CAD modeling of the part, use the 3D CAD model of the part to perform layer processing and obtain the discretized 2D layer information.

[0051] (2) Configure 3D printing raw materials according to the mass ratio of diamond: ABS resin: aluminum phosphate: EMA = 65:20:5:5.

[0052] (3) Since the diamond body in this embodiment is relatively large, in order to ensure the ductility of the extruded filament, the obtained 3D printing raw material is processed into a fine filament with a diameter of 3.25±0.05mm by using a twin-screw extruder. Silk, the extruded filaments are water-cooled and air-dried to make 500mm long thin rods for use.

[0053] (4) According to the two-dimensional layer information obtained in step (1), use the 3D printer to print the parts layer by layer using the filament ma...

Embodiment 3

[0057] A method for preparing diamond / copper thermally conductive composite parts by 3D printing, comprising the following steps:

[0058] (1) Prepare the cube parts, complete the 3D CAD modeling of the parts, use the 3D CAD models of the parts for layering processing and obtain the discretized 2D layer information.

[0059] (2) Configure 3D printing raw materials according to the mass ratio of diamond: ABS resin: aluminum phosphate: EMA = 60:25:5:5.

[0060] (3) Extrude the obtained 3D printing raw materials into filaments with a diameter of 2.75±0.05mm by using a twin-screw extruder. The extruded filaments are water-cooled and air-dried to make 500mm-long thin rods for use . The filament diamond obtained in this embodiment has a higher volume fraction, good ductility, and better overall performance.

[0061] (4) According to the two-dimensional layer information obtained in step (1), use the 3D printer to print the parts layer by layer using the filament manufacturing meth...

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Abstract

The invention discloses a near-net forming method for preparing a diamond / copper heat-conducting composite material part through 3D printing, and belongs to the field of metal-based composite materials. According to the method, diamond powder and a binder are mixed into uniform gel-like sizing agent, a diamond / cooper composite material prefabricated body is prepared by using a 3D printing technology, a porous diamond prefabricated part is formed through processes such as curing, pyrolysis and carbonization, and then copper infiltration compounding is conducted on the prefabricated part by adopting a pressure infiltration technology so as to obtain the diamond / copper composite material with good performance. The method is particularly suitable for near-net forming of complex shapes, designability and processability of the diamond / copper composite material are greatly improved, the cost is reduced, and the application field of diamond / copper is expanded.

Description

technical field [0001] The invention relates to a method for preparing diamond / copper heat-conducting composite material parts by using 3D printing near-net shape, and belongs to the field of metal matrix composite materials. Background technique [0002] With the development of miniaturization of the volume of contemporary electronic products, the power density is getting higher and higher, and the more and more concentrated electronic components make heat dissipation an increasingly prominent problem. The disadvantages of traditional heat conduction materials, such as large thermal expansion rate and low thermal conductivity, are also quite obvious. Therefore, adding high thermal conductivity materials such as diamond to traditional thermal conductivity materials can prepare composite thermal conductivity materials with high thermal conductivity. Among them, the diamond / copper composite material has the best comprehensive performance. However, the reaction sintered diamond...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D23/04C04B38/06C04B35/52C04B35/622C04B35/63C08L55/02C08L23/08C08K3/04C08K3/32
Inventor 郭宏张习敏
Owner GRIMAT ENG INST CO LTD
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