Liquidus and Solidus Temperatures of Ni-Solid Solution in Ni-Al-X (X: V, Nb and Ta) Ternary Systems

摘要

A systematic investigation was carried out to determine both liquidus and solidus surfaces of the Ni-solid solution (#gamma#) in the Ni-Al-X ternary phase diagrams successively by differential thermal analysis (DTA) technique. Each of the Group V elements of the periodic table, V, Nb, and Ta, was chosen as a ternary additive X in the present study. The #gamma#-solvus was also taken into account in determining a temperature range for a solid solution treatment above the #gamma#-solvus, i.e., "the window," as well as the maximum solubility limit of #gamma#-Ni solid solution.