An investigation of the Al-Pd-Fe phase diagram between 50 and 100at.% Al: Phase equilibria at 900-1020°C

The Al-Pd-Fe alloy system exhibits a continuous range between the solid solution of b.c.c. Fe extending at 1000degreesC up to 53 at.% Al and congruent AlPd. At higher Al concentrations three ternary cubic phases designated C, C-1 and C-2 and orthorhombic O-Al-13(Fe,Pd)(4) were revealed. The Al-Pd orthorhombic epsilon-phases dissolve up to similar to10 at.% Fe and exhibit epsilon(16) and epsilon(22) structural variants in addition to epsilon(6) and epsilon(28) typical of binary compositions. Al13Fe4 dissolves < 1.0 at.% Pd, Al5Fe2 up to 3.9 at.% Pd, Al2Fe2 up to 1.4 at.% Pd, Al3Pd2 up to 1.1 at.% Fe. Partial isothermal sections are presented for 1020, 995, 975 and 900degreesC. (C) 2003 Elsevier B.V. All rights reserved