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Treatment of tungsten carbide in low temperature plasma
Brožek, Vlastimil ; Matějíček, Jiří ; Neufuss, Karel
Tungsten carbide powder was thermally processed in a water stabilized plasma, using the WSP plasma torch developed in the Institute of Plasma Physics, where the plasma temperatures can reach 30 000 K at the nozzle exit. Oxidation of the molten carbide was suppressed by a nitrogen atmosphere during deposition on substrates positioned immediately above liquid nitrogen level. Analyses of both the deposits and spheroidized particles in the 5 – 63 μm size range determined the W:W2C:WC ratios and mechanical properties.

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