Abstract
Thoriated tungsten (tungsten, 98%: thorium oxide. 2 % ) is a widely used electrode material for inert-gas arc-welding. Data for the heat capacity, electrical resistivity. and hemispherical total emissivity of this material are reported for the temperature range 1200–3600 K. A subsecond pulse-heating technique was applied to rod specimens: radiance temperature was measured by high-speed pyrometry. Literature values of the temperature dependence of the normal spectral emissivity of tungsten were used to obtain true temperatures, using the melting point of thoriated tungsten as a calibration point. Reported uncertainties for the properties are 4 % for heat capacity, 1.5 % for electrical resistivity, and 7 % for hemispherical total emissivity.
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Righini, F., Spisiak, J., Bussolino, G.C. et al. Measurement of thermophysical properties by a pulse-heating method: Thoriated tungsten in the range 1200 to 3600 K. Int J Thermophys 15, 1311–1322 (1994). https://doi.org/10.1007/BF01458839
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DOI: https://doi.org/10.1007/BF01458839