Phase Equilibria of 600 A degrees C Isothermal Section of Zn-Al-Fe-Si Quaternary System

摘要

The phase equilibria of Zn-Al-Fe-Si quaternary system are essential to predict and control the microstructures formed during hot-dip galvanizing. In this paper, the isothermal section of Zn-Al-Fe-Si quaternary system at 600 A degrees C with Al fixed at 50 at.% has been determined experimentally by means of scanning electron microscopy coupled with energy dispersive x-ray spectroscopy and x-ray powder diffraction. Six four-phase regions have been determined in the studied isothermal section, and five more four-phase regions have been inferred from experimental data and thermodynamics rules. Six Al-Fe-Si ternary compounds have been identified in the section. tau(1), tau(2), tau(3), tau(4), tau(5) and tau(10). The maximum solubility of Zn in these phases have been determined.