Abstract
The phase equilibria in two isothermal sections of the Al-Fe-Si-Ti quaternary system with Al fixed at 90 and 75 at.% respectively, and the related ternary subsystems at 700 °C, have been investigated by scanning electron microcopy coupled with energy dispersive spectroscopy and x-ray diffraction. Only one three-phase region, L-Al + TiAl3 + FeAl3 is found in the Al-rich portion of Al-Fe-Ti system, and four three-phase regions, including the region of L-Al + τ6 + τ4, are confirmed in the Al-rich corner of the Al-Fe-Si system. Two four-phase regions and five four-phase regions have been identified in the 90 at.% Al and 75 at.% Al sections, respectively. No new ternary and quaternary compounds are found in the present work.
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