A Partial Isothermal Section at 1000 °C of Al-Mn-Fe Phase Diagram in Vicinity of Taylor Phase and Decagonal Quasicrystal
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Altogether 19 alloys of an Al-Mn-Fe system with compositions near to the Taylor phase and/or the decagonal quasicrystal were characterised by the x-ray diffraction and the energy-dispersive x-ray spectroscopy coupled with the scanning electron microscopy, after annealing at 1000 °C for 330 h. The obtained experimental results were used to propose a partial isothermal section at 1000 °C of the Al-Mn-Fe phase diagram. The ternary T-phase area of an untypical saddle shape was found to touch the Al-Mn binary one. The γ2-phase was found to be stable between 2 and 30 at.% of Fe at 1000 °C and boundaries between γ1- and γ2-areas are expected to be located very close to the Al-Mn binary.
Keywordsaluminum alloys equilibria experimental phase intermetallics isothermal section phase diagram
The authors wish to thank to the European Regional Development Fund (ERDF) for financial support of the project ITMS:26220120014 “Center for development and application of advanced diagnostic methods in processing of metallic and non-metallic materials” funded within the Research & Development Operational Programme, to the Slovak Academy of Sciences for the support in the frame of the “Center of Excellence for functional multiphase materials” (FUN-MAT, I/2/2011), as well as to the Grant Agency VEGA for the financial support under the Contracts 1/0018/15 and 2/0189/14, to the Slovak Research and Development Agency for the financial support under the Contract APVV-0076-11, and to the Czech Science Foundation for the financial support under the Contract GA P108/12/G043.