Solidification microstructure of laser floating zone remelted Al2O3/YAG eutectic in situ composite

► Characterizing three kinds of characteristic scales of Al2O3/YAG eutectic systems. ► Solid/liquid interface morphology of Al2O3/YAG eutectic systems is investigated. ► Comparing the experimental data and Magnin-Kurz model for the Al2O3/YAG eutectic systems. ► The ratio of average spacing to λex is a constant 1.6.