Thermodynamic Properties of the MnS-CuS_(0.5)Binary System

摘要

In order to discuss the formation of MnS-CuS_(0.5)inclusion in γ-Fe, the phase diagram of the MnS-CuS_(0.5) binary system has been determined by using a confocal scanning laser microscope (CSLM) and a chemical equilibration technique. In addition, the activities of MnS and CuS_(0.5) in the liquid phase at 1 473 K were investigated by chemical equilibration with molten Cu. The phase diagram of the binary system was found to be of a eutectic type with mutual solid solubility between MnS and CuS_(0.5) The activities of MnS and CuS_(0.5) showed positive deviation from the ideality. Finally, the solid steel composition equilibrated with the inclusion was estimated by using the determined thermodynamic properties.