Abstract
This paper describes some experimental results obtained thanks to the development carried out at the ESRF-ID16b beamline (European Synchrotron Research Facility, Grenoble, France) to make available a dedicated set-up achieving an unprecedented combination of spatial resolution and scan time. The study of the solidification of an Al-based alloy containing Y2O3 particles reveals several key features where very fine spatial resolution is mandatory to fully grasp the underlying fundamental mechanisms at play during solid growth. This concerns the behaviour of the ceramic particles inside the melt and their interactions with the growing solid phase during the casting of such metal matrix nano-composites. It also brings new stimulating insights on the origin of the porosities which are often encountered but undesirable in such alloys.
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