“…Recently, two theoretical assessments of the Ni-Sn system performed by use of the CALPHAD approach were published, one by Zemanova et al, 14 which modeled the Ni 3 Sn 2 phase as one phase, the other by Liu et al, 15 that includes the Ni 3 Sn 2 -LT modification. To construct a thermodynamic database for Pb-free soldering, several Sn-Ni-based ternary systems have been investigated, for example, Sn-Ni-Cu, 16 Sn-Sb-Ni, 17,18 Sn-Ni-Ag, 19 Sn-Ni-Bi, 20,21 Sn-Ni-Zn, 22 and Sn-NiAu. 23,24 The Sn-V system has also been investigated experimentally [25][26][27] and assessed thermodynamically 28,29 by several research groups.…”