Rhenium-tungsten powder (tungsten-rhenium alloy powder)

Rhenium-doped tungsten powder is an alloy with tungsten as matrix and different contents of rhenium added. Tungsten and rhenium are refractory metals. A proper amount of rhenium dissolved in tungsten can form solid solution alloys. Under the "rhenium effect", the tungsten-rhenium alloy has higher plasticity, higher recrystallization temperature, better creep resistance at high temperature, higher thermoelectric potential and higher resistivity than pure tungsten. The tungsten-rhenium alloy has good electrical properties, ductility and machability, and can be used for high temperature thermocouple and cathode wire. Tungsten-rhenium alloys have better mechanical properties at high temperature than pure tungsten and can be machinedand welded.

Rhenium has the following properties: high melting point, strong resistance to chemical corrosion, ductility after recrystallization, high resistivity over a wide range of temperatures, low vapor pressure, good oxidation resistance at high temperatures, and good shock resistance. When more than 0.1% rhenium is added to tungsten, the material improvement effect begins to highlight, and with the increase of rhenium content, the effect also gradually improves.