Manufacture Methods

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1. Soluble infiltration method^[5]

Suitable particle size and purity of Cu powder and Cr powder were put into the mold for pressing, and then it was sintered to make a molten skeleton. With the help of capillary force, Cu was melted into the Cr skeleton to make CuCr composite material (this process needs to be carried out in reducing atmosphere or vacuum).

2. Powder sintering ^[5]

Chromium powder and copper powder were mixed and pressed in a certain proportion under protective atmosphere, and then sintered to form

3. Mixed casting process^[5]

The Cu powder with a low melting point was melted at a temperature higher than the melting point of Cu, and Cr powder with a high melting point was added for mixing.

4. Explosive sintering ^[5]

After the detonation of the explosive shock wave is produced by the technology reasonable use, and then formed by the container wall cylinder polymerization shock to effect it to powder, and completed in less than a subtle about 6000 ℃ high-temperature loads and unload and 10-50 GPa pressure^[9]. Under the action of cylindrical polymerization shock waves, the plasticity of powder particles is relatively large, which leads to pore collapse and even jet formation. At the same time, the local surface temperature is also increased by the deposition of micro-kinetic energy and friction energy on the surface. In addition, because of the instantaneous loading and unloading of shock waves, heat could not be transmitted to the interior of the particles at the first time, but only melted on the surface of the particles, which was then rapidly cooled to form compacted entities with relative density above 90%.

5. Mechanical alloying ^[4]

Mechanical alloying is a process in which high energy ball mill is used to grind Cu powder and Cr powder in a certain proportion according to a certain ball material ratio for a long time to make the composite powder undergo repeated deformation, cold welding, crushing, re-welding, and re-crushing

6. Laser surface alloying^[10]

A layer of Cr powder with a thickness of 100 ~ 300 m adheres to the surface of the shot peening copper matrix with silicate binder, and then the Cr powder is irradiated with a laser beam at a certain speed under the protection of helium, which can be irradiated repeatedly once or several times if necessary. Cr powder and Cu surface layer were rapidly melted and solidified to form Cu -Cr composite material under high energy laser beam irradiation

The alloys

The alloys

Chromium-Copper alloy

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