Study of the Liquidus and Solidus Surfaces of the Quaternary Fe-Ni-Cu-S System: V. Refinement and Addition of the Data on the Ternary Fe-Ni-S and Fe-Ni-Cu Phase Diagrams

A deep analysis and mutual fitting of the data on all ternary boundary systems have resulted in obtaining information about the phase transformations in high-sulfur Fe-Ni-S compositions and in augmentation of data on the projections of the solidus surfaces in the Fe-Ni-Cu and Fe-Ni-S systems. The studies are performed using differential thermal analysis, scanning electron microscopy, and electron-probe microanalysis. The investigation carried out is a continuation of the cycle of studies dealing with an experimental construction of the phase diagrams of the ternary systems bounding the quaternary Fe-Ni-Cu-S system.