Phase equilibria and structural investigations of the general NiAs-type in the ternary system Ni–Pt–Sn

Experimental investigation of the ternary system Ni–Pd–Sn with special focus on the B8-type phase

“…Special focus within this investigation lies on the B8-type phases in the system. One The system and the behaviour of the B8-type phases is quite similar to the recently investigated NiPt-Sn system [2]. There, a maximum between the B8-phase and the (Ni/Pt) solid solution is formed with the liquid, as well.…”

“…The occupation of 2d with Ni-atoms is strongly increasing with increased Ni-content and reaches a maximum at about 45 at.% Ni. At higher Ni-content, the occupation with Ni-atoms is slightly decreasing again, in agreement with the overall decrease of transition-metal occupation at 2d mentioned before.Related behaviour was recently observed in the Ni-Pt-Sn system[2]. There, a strictly stoichiometric 1:1 NiAs-phase is present in the binary Pt-Sn system.…”

“…In Ni-Pt-Sn, nearly the same situation as in the currently investigated system was observed. A maximum is formed in the three-phase field {L+(Ni/Pt)+B8} at about 1140 °C[2].In the present system Ni-Pd-Sn, the maximum is connected with two ternary eutectic reactions (E1, E2). Moreover, two solid state reactions were observed at lower temperatures: one ternary (E3) and one ternary transition reaction (U1).…”

“…A second factor that may influence the behaviour of the lattice parameters is the occupation of the trigonal-bipyramidal position (atomic site 2d) with transition metals. As recently described for the systems Ni-Sn-Te[1] and Ni-Pt-Sn[2], filling of this position with additional transition-metal atoms leads to an increase of the lattice parameter a.Hence, in the system Ni-Pd-Sn the decrease of transition-metal content along the section Ni 0 Pd 64 Sn 36 -Ni 58 Pd 0 Sn 42 leads to a decrease of the lattice parameter a.…”

Thermodynamic modelling of the general NiAs-type structure: A study of first principle energies of formation for binary Ni-containing B8 compounds

“…Recently, an investigation of the ternary system Ni-Pt-Sn [63] showed ordering phenomena in the NiAs phase. In this system a continuous solid solution between the binary NiAs compounds PtSn and Ni 3 Sn 2 HT was observed.…”