Springer LINK: The European Physical Journal B - Abstract Volume 4 Issue 2 (1998) pp 169-174

The European Physical Journal B

ISSN: 1434-6028 (printed version)
ISSN: 1434-6036 (electronic version)

Table of Contents

Abstract Volume 4 Issue 2 (1998) pp 169-174

Thermal gradient induced sidebranching in directional solidification

M. Georgelin (a), A. Pocheau (b)

IRPHE (UMR 6594 CNRS), Universités Aix-Marseille I & II, Faculté de Saint-Jérôme, S.252, 13397 Marseille Cedex 20, France

Received: 22 December 1997 / Revised: 31 March 1998 / Accepted: 2 April 1998

Abstract: 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

(a) email: georgel@lrc.univ-mrs.fr
(b) email: pocheau@lrc.univ-mrs.fr

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