Abstract
The solubility of tungsten in Co ― Sn melts and the growth kinetics of a W6Co7 phase layer at the tungsten ― melt interface were studied at 1200°C. The liquid alloys composition in the three-phase equilibrium W ― W6Co7 ― melt was established as (at. fraction) 0.51 Co, 0.49 Sn, 2.3·10−3 W. The solubility of tungsten in the investigated range of melt compositions is well represented by the equation lgx W = −0.964-3.420x Sn, where x W and x Sn are atomic fractions of the elements in the melt. The calculated thermodynamic properties can be used for the analysis of other systems which include cobalt and tungsten.
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