Tungsten Alloy(b)

In W-ThO2 based alloy, the addition of an appropriate amount of thermal stability of ThO2 particle dispersion, can not only reduce the electron work function, can also inhibit the grain growth of tungsten, the material has a high recrystallization temperature, excellent high temperature strength and creep resistance. Tungsten thorium alloy is not only a hot electron emission material widely used, and is excellent in the electrode material.

Tungsten-rhenium alloys, rhenium addition, not only can improve the strength of the material, improve the recrystallization temperature of the alloy is about 200 ~ 400 ℃, the secondary recrystallization plastic, grain growth is slow, and can significantly reduce the plastic - brittle transition temperature . Adding more than 30%, such as rhenium, it will damage the workability of the alloy. Tungsten-rhenium alloy also has a high thermoelectric power, at 2200 ℃, thermoelectric power and temperature into a linear relationship. Tungsten-rhenium thermocouples measure temperatures up to 3000 ℃, is an excellent high-temperature thermocouple material.




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