A contribution to the Al-Pd-Mn phase diagram

A part of the Al-Pd-Mn phase diagram in the vicinity of the icosahedral pha se was refined. Partial isothermal sections of 710, 850, 870 and 880 degree s C are presented. The overall compositional range of the icosahedral phase was found to be between 5.8 and 10.5 at.% Mn and between 69.5 and 71.5 at. % Al at these temperatures. It shifts to lower Mn concentration at lower te mperatures. It was confirmed that the phase usually designated Al3Pd has a lower Al concentration in the binary alloys than that according to the form ula. It extends to the ternary compositions up to about 5 at.% Mn. The incr ease of the Mn content results in an increase of the Al concentration of th is phase. (C) 1999 Elsevier Science S.A. All rights reserved.