Liquidus projection and thermodynamic modeling of Sn–Zn–Cu ternary system

The ternary Sn–Zn–Cu system is of interest for the electronic solder applications. Its liquidus projection was experimentally determined and the system was thermodynamically modeled in this study. Sn–Zn–Cu alloys of various compositions were prepared. Differential thermal analysis was employed to de...

Full description

Saved in:

Bibliographic Details
Published in:	Journal of alloys and compounds 2009-05, Vol.477 (1), p.283-290
Main Authors:	Huang, Yu-chih, Chen, Sinn-wen, Chou, Chin-yi, Gierlotka, Wojciech
Format:	Article
Language:	eng
Subjects:	Cross-disciplinary physics: materials science rheology Exact sciences and technology Liquid quenching Materials science Metals Phase diagrams and microstructures developed by solidification and solid-solid phase transformations Phase diagrams of metals and alloys Physics Scanning and transmission electron microscopy Thermal analysis
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	The ternary Sn–Zn–Cu system is of interest for the electronic solder applications. Its liquidus projection was experimentally determined and the system was thermodynamically modeled in this study. Sn–Zn–Cu alloys of various compositions were prepared. Differential thermal analysis was employed to determine the reaction temperatures and solidification sequences. The solidified samples were metallographically examined and the primary solidification phases were determined. There is no ternary compound. The primary solidification phases are the terminal solid solutions and binary intermetallic compounds, and they are Sn, η-Cu 6Sn 5, ɛ-Cu 3Sn, γ-(Cu–Sn), β, Cu, γ-Cu 5Zn 8, δ-CuZn 3, ɛ-CuZn 5 and Zn. Thermodynamic modeling was developed from the models of the constituent binary systems and the experimental results from this study and those in the literature. The calculated isothermal sections and liquidus projection are in agreement with the experimental determinations. Six class II and one class III invariant reactions are found in the Sn–Zn–Cu system.
ISSN:	0925-8388 1873-4669