Main characteristics

High thermal/electrical conductivity: The addition of copper improves the thermal and electrical conductivity of pure tungsten, making it suitable for scenarios that require heat dissipation.

Low thermal expansion coefficient: The addition of tungsten suppresses the thermal expansion of copper, making the material dimensionally stable at high temperatures.

High melting point/high temperature resistance: The melting point of tungsten (3422 ° C) enables the material to work in high temperature environments.

Good mechanical strength: more wear-resistant and arc resistant than pure copper.

Common application areas

Electronic and vacuum devices:

Electrode, contact, heat dissipation substrate (such as semiconductor packaging, high-power LED).

Heat sink materials in vacuum devices, such as microwave tubes and lasers.

Aerospace: rocket nozzles, high-temperature components.

Military industry and national defense: armor piercing bullet core, electromagnetic gun components.

Industrial processing: EDM electrodes, high-temperature molds.

Preparation process

Powder metallurgy (mainstream method):

Mixing tungsten powder with copper powder (or copper infiltration method).

Compression molding (cold isostatic pressing, compression molding).

High temperature sintering (liquid-phase sintering or copper infiltration).

3D printing: an emerging technology suitable for complex structures.

Composition ratio

Common Proportions:

High tungsten type: W70% -90%, Cu10% -30% (high hardness, arc resistance).

High copper type: Cu50% -70% (high thermal conductivity/conductivity).

Customization: Adjust the proportion according to the application (such as W80Cu20 used for spark electrodes).

Advantages and limitations

Advantages:

Balancing the performance of tungsten and copper, with strong designability.

Non magnetic, radiation resistant, suitable for special environments.

Limitations:

High cost (tungsten resources are scarce and the process is complex).

Difficult to process (tungsten has high hardness and requires diamond cutting tools).