Method for preparing nano SiC/Cu-based composite material employing pressureless infiltration technique

A technology of composite material and impregnation method, which is applied in the field of preparation of nano-SiC/Cu-based composite materials by pressureless infiltration method, can solve the problems of complex and difficult-to-control preparation process, poor interface wetting, poor chemical compatibility, etc. Achieve the effect of simple and easy control of the process, simple and convenient processing technology, and good shape retention

Active Publication Date: 2014-01-01
江西余越科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the poor physical and chemical compatibility of the interface between silicon carbide and copper matrix, poor interface wetting, and the current nano-SiC / Cu-based composite materials have low density and low strength, complex and difficult to control preparation process, and high production costs. Problem, the purpose of the present invention is to provide a method for preparing nano-SiC / Cu-based composite material by pressureless infiltration method, the nano-SiC / Cu composite material (nano-silicon carbide / copper-based composite material) prepared by this method has high Strength, high density, etc., and the method has low cost of raw materials, and the process is simple and easy to control

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0017] A kind of pressureless impregnation method of the present invention prepares the method for nanometer SiC / Cu matrix composite material, comprises following process step:

[0018] 1. Put 5g of nano-SiC powder in 200mL of 10% hydrofluoric acid solution for roughening treatment for 30min, wash with deionized water after treatment, dry in an oven at 90°C after cleaning, and then place in 250mL 0.06mol / L SnCl 2 2H 2 O and 25mL / L concentrated hydrochloric acid mixed solution for sensitization treatment for 30min, washed with deionized water after cleaning, dried in an oven at 90°C, and finally placed in 250mL 0.03mol / L AgNO 3 Carry out activation treatment in the solution for 30 minutes, wash with deionized water after treatment, and place in an oven for drying at 90°C after cleaning;

[0019] 2. Take 4g of pretreated nano-SiC powder and put it in 400mL 25g / L CuSO 4 ·5H 2 O, 44mL / L HCHO, 45g / L Potassium Sodium Tartrate and 10mg / L Potassium Ferrocyanide mixed bath for ...

Embodiment 2

[0025] The difference between this embodiment 2 and embodiment 1 is that: in step 2, the pH of the plating solution is kept at 13; in step 3, the nano-SiC powder and nickel powder with a mass ratio of 2:0.1 are mixed evenly and then placed in a pressure molding machine for molding. Compacted preform; in step 4, place the compacted preform and pure copper block in a graphite crucible at a mass ratio of 3:100; in step 5, heat up to 1100°C and keep warm for 4 hours for impregnation. Other steps are identical with embodiment 1. The nanometer SiC / Cu matrix composite material with a volume fraction of SiC of 56% and a volume fraction of Cu of 44% is obtained immediately after the furnace is fired.

Embodiment 3

[0027] The difference between this embodiment 3 and embodiment 1 is that in step 3, the nano-SiC powder and nickel powder with a mass ratio of 2:0.15 are evenly mixed and placed in a pressure molding machine to form a compacted preform; in step 4, the pressed The blank preform and the pure copper block are placed in a graphite crucible at a mass ratio of 5:100; in step 5, the temperature is raised to 1300°C, and the temperature is kept for 6 hours for impregnation. Other steps are identical with embodiment 1. The nano-SiC / Cu-based composite material with a volume fraction of SiC of 62% and a volume fraction of Cu of 38% is obtained immediately after firing the furnace.

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Abstract

The invention discloses a method for preparing a nano SiC / Cu-based composite material employing a pressureless infiltration technique. The method comprises the following steps: putting nano SiC powder and nickel powder, which are subjected to surface modification treatment, into a compression moulding press according to the ratio to press and mold, so as to obtain a compact prefabricated part, and then putting the compact prefabricated part into a graphite crucible; putting a pure copper block at the upper part of the compact prefabricated part; carrying out impregnation reaction inside a box-type atmosphere furnace under nitrogen protection; carrying out heat preservation for 4-6 hours at the temperature of 1100-1400 DEG C, and cooling along with the furnace, so as to obtain the nano SiC / Cu-based composite material. The nano SiC / Cu-based composite material disclosed by the invention has the advantages of high strength, high density, excellent wear-resisting property and the like. The technology disclosed by the invention is simple and easy to control. The nano SiC / Cu-based composite material disclosed by the invention is applied to the casting technology of a copper water jacket, a copper chute and a copper cooling wall, and is mainly applied to improvement of the performance of buried pipe copper-casting cooling equipment; the service lives of the copper water jacket, the copper chute and the copper cooling wall are prolonged.

Description

technical field [0001] The invention relates to a method for preparing nano-SiC / Cu-based composite materials by a pressureless impregnation method, and belongs to the technical field of preparation methods of SiC / Cu-based composite materials. Background technique [0002] Copper's insufficiency in room temperature strength, high temperature performance, and wear resistance limits its wider application. Therefore, in order to obtain new high-strength, high-conductivity and high-wear-resistant alloy materials, the research on copper-based composite materials has attracted the attention and attention of many scholars at home and abroad. Silicon carbide nanomaterials have excellent properties such as low density, low thermal expansion coefficient, high thermal conductivity, and high strength, and their bulk modulus is large, which can effectively inhibit the expansion of the matrix. High volume fraction (50%-70%) SiC / Cu-based composites can combine the advantages of Cu and SiC...

Claims

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Application Information

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IPC IPC(8): C22C1/10C22C9/00C22C32/00
Inventor 阮俊达陈建军陈学兵王明明张炬栋薛一凡
Owner 江西余越科技有限公司
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