Tungsten-copper Heat Sink Tubing

Tungsten copper heat sink tubes are composite materials manufactured using powder metallurgy techniques that involve tungsten and copper. These tubes are manufactured using techniques such as static pressure forming, copper infiltration, and high-temperature sintering. They combine tungsten's low thermal expansion coefficient and high hardness with copper's superior thermal and electrical conductivity. A typical case is W-70, which has 70% tungsten and 30% copper and a density between 13.8 and 14 g/cm3. Other properties include a conductivity of 42% IACS, bending strength around 700 MPa, softening temperature of 900 degrees Celsius, and a hardness of 185 HV. They possess a thermal expansion coefficient of 5 - 7 x 10 6 / degree Celcius which represents their stability during temperature fluctuations. Interfacial cracks are avoided as their thermal expansion is paired with that of limited expanding semiconductor materials such as gallium nitride. They can also withstand high temperatures and are resistant to arc ablation, which is ideal for transient high temperature environments.