Thermodynamic Properties of Alumina-saturated Iron-carbon-bismuth Alloys
Using direct and indirect equilibration methods, the solubilities of iron in molten bismuth and those of bismuth in molten iron-carbon alloys have been measured over the temperature range 1473-1873 K. the Henrian behaviour of bismuth in molten ferrous alloys allows the calculation of its activity coefficient, which in turn facilitates modelling as a function of temperature and carbon content, using the unified interaction parameter formalism developed by Pelton and Bale. the modelling results generate the expression: lnγ Bi = (15830/T - 1.578)+(-1.124·10 5/T + 74.762)X C + (7.823/T + 3.69)X C 2. a model has also been developed expressing bismuth content in molten iron-carbon alloys as a function of temperature and composition: log(%Bi) = (-2624.5/T + 0.066) + (22522/T - 9.59)(%Bi) + (-2269.5/T + 1.494)(%C) + (846/T - 0.54)(%C) 2.
L. Chang et al., "Thermodynamic Properties of Alumina-saturated Iron-carbon-bismuth Alloys," Steel Research, Verlag, Jan 1998.
Materials Science and Engineering
Article - Journal
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