Tungsten alloy tube for plasma sprayed has high melting point, low thermal expansion coefficient and very low saturation vapor pressure. Besides, it still has good support in high temperature. It is widely used in the electric vacuum industry, thermocouple and military industry.
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Plasma spraying is a material surface strengthening and surface modification technology that can make the surface of the substrate wear-resistant, corrosion-resistant, high-temperature resistant, electrical insulation, heat insulation, radiation protection, wear reduction and sealing. Plasma spraying technology is a method in which a plasma arc driven by a direct current is used as heat source to heat ceramic, alloy, metal or the like into molten or semi-molten state, which is sprayed at a high speed to a surface of a pretreated workpiece to form a firmly adhered surface layer.
