24-15 EXTINDEREA SOLUBILITĂŢII ÎN STARE SOLIDĂ A SISTEMULUI Fe-Ni PRIN ALIERE MECANICĂ


SOLID STATE SOLUBILITY EXTINCTION OF Fe-Ni SISTEM
BY MECHANICAL ALLOYING
Experiments took place in a high energy ball planetary mill, with four
villas. There were used 46 balls having 15 mm diameter to mill 100 g powder
mixtures of Fe80Ni20, Fe70Ni30, Fe60Ni40, Fe50Ni50, Fe40Ni60, Fe30Ni70,
Fe20Ni80 (figures in mass %) in each vial. Milling space of each vial was filled
a half with balls and powder and the balls/powder mass ratio was of 8: 1. There
were taken samples (5 g of mixture powder) at 0, 1, 2, 4, 8, 16, 32, 48, and 64
hours of milling. The appeared identified phases are solid solutions of Fe(VCC)
and Ni(FCC) in the milled mixtures subjected to a minimum 2 hours of milling.
Iron is imposing its crystallizing system between 70 – 100 mass % of Fe and
nickel between 40 – 100 mass % of Ni.
Cuvinte cheie: aliere mecanică, pulberi Fe – Ni, moară planetară
Keywords: mechanical alloying, Fe-Ni powders, planetary mill

15 EXTINDEREA SOLUBILITĂŢII ÎN STARE SOLIDĂ