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A powder metallurgy preparation method of dispersed copper-copper laminated composite material

A composite material and powder metallurgy technology, which is applied in the field of powder metallurgy preparation of dispersed copper-copper laminated composite materials, can solve the problems of poor plastic formability and easy cracks, and achieve the effect of improving deformation ability and good electrical and thermal conductivity

Active Publication Date: 2022-04-22
CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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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 in order to solve the aluminum oxide dispersion strengthened copper material in the prior art 2 o 3 When the content is high, the plastic formability is poor, and cracks are easy to occur in the deformation process such as extrusion and rolling. A powder metallurgy preparation method for dispersed copper-copper laminated composite materials is proposed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A powder metallurgy preparation method for dispersed copper-copper laminated composite material comprises the following steps:

[0018] (1) Raw material preparation: The raw materials used are electrolytic copper powder, internally oxidized Cu-Al 2 o 3 pink.

[0019] of which Cu-Al 2 o 3 The powder is prepared by the following method: atomizing Cu-Al alloy powder with 100-200 mesh water, wherein the mass fraction of Al is 1%. Oxidize Cu-Al alloy powder in an air furnace at a temperature of 300°C for 40 hours to obtain CuO-Al 2 o 3 powder. Then the alloy powder was kept in a nitrogen atmosphere furnace at 800 °C for 3 h to obtain Cu 2 O-Al 2 o 3 powder, and then kept in a hydrogen atmosphere furnace at 800°C for 3h to reduce excess oxygen to obtain Cu-1.9%Al 2 o 3 powder.

[0020] (2) Cold pressing forming: using a flat-bottomed cold pressing die, alternately laying electrolytic copper powder and Cu-Al 2 o 3 Powder, the compaction pressure is 200MPa, first ...

Embodiment 2

[0024] A powder metallurgy preparation method for dispersed copper-copper laminated composite material comprises the following steps:

[0025] (1) Raw material preparation: The raw materials used are electrolytic copper powder, internally oxidized Cu-Al 2 o 3 pink.

[0026] of which Cu-Al 2 o 3 The powder is prepared by the following method: atomizing Cu-Al alloy powder with 100-200 mesh water, wherein the mass fraction of Al is 0.5%. Oxidize Cu-Al alloy powder in an air furnace at a temperature of 300°C for 40 hours to obtain CuO-Al 2 o 3 powder. Then the alloy powder was kept in a nitrogen atmosphere furnace at 800 °C for 2 hours to prepare Cu2O-Al 2 o 3 powder, and then kept in a hydrogen atmosphere furnace at 800°C for 3h to reduce excess oxygen to obtain Cu-0.94%Al 2 o 3 powder.

[0027] (2) Cold pressing forming: using a flat-bottomed cold pressing die, alternately laying electrolytic copper powder and Cu-Al 2 o 3 Powder, the compaction pressure is 100MPa, f...

Embodiment 3

[0032] A powder metallurgy preparation method for dispersed copper-copper laminated composite material comprises the following steps:

[0033] (1) Raw material preparation: The raw materials used are electrolytic copper powder, internally oxidized Cu-Al 2 o 3 pink. of which Cu-Al 2 o 3 The powder is prepared by the following method: using 100-200 mesh water atomization Cu-Al alloy powder, wherein the mass fraction of Al is 2.2%. Oxidize Cu-Al alloy powder in an air furnace at a temperature of 300°C for 40 hours to obtain CuO-Al 2 o 3 powder. Then the alloy powder was kept in a nitrogen atmosphere furnace at 800 °C for 3 h to obtain Cu 2 O-Al 2 o 3powder, and then kept in a hydrogen atmosphere furnace at 800°C for 3h to reduce excess oxygen to obtain Cu-4%Al 2 o 3 powder.

[0034] (2) Cold pressing forming: using a flat-bottomed cold pressing die, alternately laying electrolytic copper powder and Cu-Al 2 o 3 Powder, the compaction pressure is 200MPa, first spread ...

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Abstract

The invention discloses a powder metallurgy preparation method of a dispersed copper-copper laminated composite material. The method comprises the following steps: (1) raw material preparation: the raw material used is copper powder, internally oxidized Cu-Al 2 o 3 pink. (2) Cold pressing forming: using a cold pressing mold, first spread a layer of copper powder and compact it; then spread a layer of Cu‑Al 2 o 3 Powder, compacted; another layer of copper powder, compacted; another layer of Cu‑Al 2 o 3 powder, compacted; and so on. (3) Sintering: Sinter the cold compact in a vacuum or reducing atmosphere, the sintering temperature is 800-1050°C, and the time is 0.5-6h. This method can improve the plastic deformation ability of aluminum oxide dispersion strengthened copper material, while maintaining its good electrical and thermal conductivity, and solve the problem of this material in Al 2 o 3 When the content is high, it is easy to produce cracks in the deformation process.

Description

technical field [0001] The invention belongs to the field of metal matrix composite materials. Specifically relates to a powder metallurgy preparation method of dispersed copper-copper laminated composite material. Background technique [0002] Aluminum oxide particle reinforced copper material has good strength, electrical conductivity, thermal conductivity and other characteristics. Because Al 2 o 3 The wettability of particles and copper matrix is ​​poor, and Al 2 o 3 The performance of composite materials obtained by mixing particles with copper powder for powder metallurgy preparation is poor. Therefore, at present, the internal oxidation method with higher cost and more complicated process is generally used to prepare alumina particle reinforced copper materials. The material Al obtained by the internal oxidation method 2 o 3 The particles are fine and dispersed, evenly distributed, and have good performance. They are called dispersed copper materials, which ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/10C22C9/00B22F7/02B22F3/02B22F3/14B22F9/08
CPCC22C1/10C22C9/00C22C32/0021B22F7/02B22F3/02B22F3/14B22F9/082C22C2204/00
Inventor 郑顺奇郑阳升贺勇汪祥余
Owner CHINA WEAPON SCI ACADEMY NINGBO BRANCH