Liu et al. have investigated the microstructure of AZ-GdAlO3 eutectic ceramic fabricated using laser directed energy deposition (LDED) technique. The formation of periodic banded structures was reported along the building direction (BD) and its formation was attributed to the abnormal growth of nanoscale features adjacent to the melt pool . Within a eutectic colony, a "Chinese-script" eutectic structure with an entanglement of bright (GdAlO3) and dark phases (Al2O3) was observed . In addition, it was observed that colonies along the longitudinal section show a columnar morphology and are elongated perpendicular to the BD . The aforementioned morphology of the colonies (along the longitudinal section) was mainly attributed to the heat conduction behaviour in the melt pool due to which the microstructural growth occurs against heat flow direction leading to an elongation of eutectic colonies (along the longitudinal section) perpendicular to the melt pool . Moreover, the eutectic spacing was reported to decrease from ~ 0.63 ± 0.11 μm at the sample surface to ~ 0.99 ± 0.08 μm at the centre of the sample . This has been attributed to a higher cooling rate at the surface as compared to that of the sample interior .