Silver - Aluminium - Gold

Alan Prince

Introduction

The only data on the system is a 500°C isothermal section [70Fra] determined by examination of twelve alloys using the X-ray diffraction technique. No ternary phases were found. At 500°C all the binary compounds except Ag₃Al enter into the equilibria. There is little solubility of Ag in Au₅Al₂, Au₂Al, AuAl, and little solubility of Au in Ag₂Al. The compound AuAl₂ dissolves some 10 at.% Ag and the single-phase region based on Au₄Al stretches across nearly the whole system. (Note the similarity in crystal structure of the compounds Au₄Al and Ag₃Al).