A Coherent Phase Diagram of the [(AuCu)_0.86Ag_0.14]_1-XPt_X Pseudobinary Section in Au-Cu-Ag-Pt Quaternary System

Abstract

In order to determine a coherent phase diagram of the [(AuCu)_0.86Ag_0.14]_1-XPt_X pseudobinary system, phase identifications and analyses of the microstructural configurations were performed by means of transmission electron microscopy. Various phase regions were detected in the coherent phase diagram as follows; (1) α₀ (fcc) single phase region, (2) two-phase region (α₁+α₂), (3) AuCu I (L1₀)+α₀, (4) AuCu I+α₂, (5) AuCu II (L1_0-S)+α₂, (6) AuCu I+AuCu II+α₂, (7) AuCu I single phase region. Microstructural features of these regions relating to the phase transformations were described.