Tungsten Copper Heat Base Properties
Introduction
Tungsten copper heat base is fabricated from carefully controlled porous tungsten that is vacuum infiltrated with molten copper. This results in a WCu composite that has high conductivity and a matched low thermal expansion for heat bases.
It is a composite of tungsten and copper. By controlling the content of tungsten, we can design its coefficient of thermal expansion (CTE), matching that of the materials, such as ceramics (Al2O3, BeO), Semiconductors (Si), kovar, etc.
Advantages
High thermal conductivity,
Excellent electrical conductivity,
Excellent size control, surface finish and flatness,
Semi-finished or finished (Ni/Au plated) products available of properties of WCu and MoCu heat materials.
| Material | W90Cu10 | W88Cu12 | W85Cu15 | W80Cu20 | W75Cu25 |
| Tungsten Content (wt%) | 90 ± 1 | 88 ± 1 | 85 ± 1 | 80 ± 1 | 75 ± 1 |
| Density at 20°C (g/cm3) | 17.0 | 16.8 | 16.3 | 15.6 | 14.9 |
| Coefficient of thermal expansion at 20°C (10-6/K) | 6.5 | 6.7 | 7.0 | 8.3 | 9.0 |
| Thermal conductivity at 25°C/100°C (W/mK) | 180 - 190 | 185 - 195 | 190 - 200 | 200 - 210 | 220 - 230 |
| Specific heat at 100°C(J/kgK) | 160 | 168 | 174 | 195 | 211 |
| Specific electrical resistance at 20°C (μΩm) | 0.045 | 0.043 | 0.04 | 0.034 | 0.029 |
| Vickers hardness (HV 10) | 300 | 290 | 280 | 260 | 240 |
Related Products:
Heat base, also known as the piece of tungsten copper heat base. An heat base is the heat transfer of a component or assembly inside the solid material with a fluid medium, such as air or liquid.
Heat spreader is most often having high thermal conductivity. Functionally, it is a primary heat exchanger that moves heat between a heat source and a secondary heat exchanger.
A heat sink is a term for a component or assembly that transfers heat generated within a solid material to a fluid medium, such as air or a liquid. Examples of heat sink is the heat exchangers used in refrigeration and air conditioning systems and the radiator (also a heat exchanger) in a car.
Tungsten copper heat seat material is a composite of tungsten and copper. Tungsten Copper Alloy is the metal mostly used in heat sinks, which draw heat away from the more heat-sensitive elements inside electric devices.