Abstract
Crystallization of graphite and (Fe 1− x Ni x ) 3C carbide from the FeNiC system has been studied at pressures up to about 5.5GPa. Pressure and time as crystallization factors were investigated. Numerous elements have been added to the base metal to study their individual effects on graphite precipitation. The microstructures of several specimens from different experiments are illustrated. It was found that pressure stabilizes (Fe 1− x Ni x ) 3C carbide and time promotes the formation of large graphite crystals. Flake-type graphite is obtained with Si, Se, Cd, Zn, Cu, I, and Al additions. Specific shapes are promoted by Te, Sb, Pb, Ba, and BaSi. Spheroidal graphite crystals are observed when Mg and MgSi are introduced.
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