Copper fin-porous copper composite part, preparation method thereof and fin type copper composite radiator

[0054] The present application proposes a method for preparing copper fin-porous copper composite parts, comprising the following steps:

[0055] Co-injection of the copper feed for preparing copper fins and the porous copper feed for preparing porous copper to obtain a green copper fin-porous copper composite structure; followed by degreasing and sintering to obtain a one-time formed copper fin Sheet-porous copper composite parts;

[0056] Among them, the shrinkage ratio of copper feed and porous copper feed is equal.

[0057] By using metal injection molding technology to form copper fins and porous copper into copper fin-porous copper composite parts at one time, the parts can be made with high dimensional accuracy and can be mass-produced, which not only reduces the manufacturing process, but also greatly reduces the cost. In addition, in the obtained copper fin-porous copper composite parts, the copper fin and the porous copper interface are metallurgically bonded, the inte

[0096] Example 1

[0097] This embodiment provides a finned copper composite heat sink with high thermal conductivity, which specifically includes:

[0098] Select the atomized copper powder with a particle size of less than 30μm and an average particle size of 8μm;

[0099] The organic binder with polyoxymethylene as the main component is selected, and the mass fraction of polyoxymethylene is 85%;

[0100] Select PA6 particles with an average particle size of 500 μm;

[0101] According to the volume fraction of 50% each, weigh the copper powder and PA6 particles for use;

[0102] Weigh the polyoxymethylene-based binder according to the shrinkage ratio of 1.16 for use;

[0103] The weighed atomized copper powder and the polyoxymethylene-based binder were mixed in an internal mixer at 190 °C for 0.5 h under the protection of an argon atmosphere, and then cooled to 170 °C, and then PA6 particles were added to continue the internal mixing for 1 h to obtain porous copper. feeding

[0109] Example 2

[0110] This embodiment provides a finned copper composite heat sink with high thermal conductivity, which specifically includes:

[0111] Select the atomized copper powder with a particle size of less than 30μm and an average particle size of 10μm;

[0112] The organic binder with polyoxymethylene as the main component is selected, and the mass fraction of polyoxymethylene is 85%;

[0113] Select PA6 particles with an average particle size of 100 μm;

[0114] Weigh the copper powder and PA6 particles according to the volume fraction of 20% and 80%, respectively;

[0115] Weigh the polyoxymethylene-based binder according to the shrinkage ratio of 1.16 for use;

[0116] The weighed atomized copper powder and the polyoxymethylene-based binder were mixed in an internal mixer at 190 °C for 0.5 h under the protection of an argon atmosphere, and then cooled to 170 °C, and then PA6 particles were added to continue the internal mixing for 1 h to obtain porous copper.