A Novel Primitive Cubic Al-Fe-Si Phase in an Al-0.5Fe-0.2Si (wt.%) alloy
Résumé
We report the identification of a new ternary Al-Fe-Si phase synthesized by arc-melting. Energy dispersive Xray spectroscopy measurements show an homogeneous chemical distribution within the intermetallic grain with an overall stoichiometry equal to Al 81.0 Fe 13.6 Si 5.4 (at.%). Atomically resolved High-Angle Annular Dark Field images collected along the [001] zone-axis are consistent with a cubic structure with an unit cell parameter close to 8.9 Å.
Using microdiffraction analysis, it was possible to explore the zero-order Laue zone (ZOLZ) and first-order Laue zone (FOLZ) . This electron diffraction characterization leads to the conclusion that the Al 81.0 Fe 13.6 Si 5.4 (at.%) crystallizes in the Pm 3 space group.
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