Abstract
The levitated drop method has been used to measure the surface tensions, densities and enthalpies of liquid metals and alloys. Undercoolings of 300 °C were recorded for pure metals but only 50 °C could be obtained for austenitic stainless steels. Surface tensions for the undercooled state of pure Fe, Ni and Au were found to be linear extrapolations of the data obtained for the liquid phase. Densities for the liquid state of Fe, Ni and commercial alloys were found to be within ±2% of accepted values. A levitated drop calorimeter has been constructed for the measurement of enthalpies and heat capacities of metals and alloys to an accuracy of ±1%. Measurements of the densities and enthalpies for the liquid and undercooled states of metals and commercial alloys will be carried out in the near future.
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