Fig. 1: The DIRSOL method in the TA apparatus.

a Schematic representation. V: pulling velocity. θ: viewing angle. b In situ TA images during directional solidification of a eutectic SCN-DC alloy (V = 0.007 µms−1). Top: detail of an oblique-view image (rescaled to 1:1 aspect ratio) of a rod-like eutectic pattern, with DC rods appearing white and the SCN matrix dark59. Bottom: side-view image (liquid on top, eutectic solid on bottom).