https://doi.org/10.1007/s100510050365
Thermal gradient induced sidebranching in directional solidification
IRPHE (UMR 6594 CNRS) , Universités Aix-Marseille I & II,
Faculté de
Saint-Jérôme, S.252, 13397 Marseille Cedex 20, France
Corresponding authors: a georgel@lrc.univ-mrs.fr - b pocheau@lrc.univ-mrs.fr
Received:
22
December
1997
Revised:
31
March
1998
Accepted:
2
April
1998
Published online: 15 July 1998
The effect of thermal gradient on sidebranching is studied experimentally in directional solidification of impure succinonitrile. An experimental procedure capable of changing thermal gradient while keeping pulling velocity and cell-spacing constant is applied. It enables us to directly observe the effect on sidebranching of the sole change of thermal gradient. It is found that increase of thermal gradient enhances sidebranch amplitude and reduces sidebranching onset.
PACS: 81.30.Fb – Solidification / 68.70.+w – Whiskers and dendrites (growth, structure, and nonelectronic properties / 47.20.Hw – Morphological instability; phase changes
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1998
