Phase equilibria in the Ni-Mn-Sb alloy system

摘要

Phase equilibria and ordered phase regions in the Ni-Mn-Sb system at 700 and 900 degrees C and the martensite phase region at room temperature were determined mainly by the diffusion triple method. It was confirmed that single-phase region of the ordered bcc phases exists in a wide composition range of a central part at both 700 and 900 degrees C and that the region is divided into two regions of half-Heusler C1(b) and full-Heusler L2(1) at 700 degrees C, while the C1(b) phase is missing at 900 degrees C. The B-2 + L2(1) phase separation was also confirmed in a certain composition range near Ni-50% Mn, and the iso-Ms (= RT) line in the L2(1) phase region was also estimated to be located from 12 to 16 at.% Sb. (C) 2018 Elsevier B. V. All rights reserved.