Phase Equilibria in the Ni-Sn-Zn System at 500°C

Author: Liang Jian-lie  

Publisher: Springer Publishing Company

ISSN: 1543-186X

Source: Journal of Electronic Materials, Vol.40, Iss.11, 2011-11, pp. : 2290-2299

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Abstract

The isothermal section of the Ni-Sn-Zn ternary system at 500°C was investigated by means of x-ray diffraction (XRD), and scanning electron microscopy with energy-dispersive spectrometry (SEM/EDS). A new ternary compound with a composition of Ni36Sn42Zn22 (in at.%) was discovered in the present study. The space group of this compound is P $$ \overline{\textit{4}}$$ 3m with lattice parameter a = 0.88283(4) nm. Two ternary phases, i.e., τ1 and τ2, which are derived from α′-Ni3Sn2 and β-NiZn, respectively, were observed to be present at 500°C. The solubility of Sn in Ni2Zn11 was determined to be about 3.5 at.%, and that of Zn in Ni3Sn to be about 5 at.%.