Abstract This paper investigates the solidification behaviour of the Ag--Cu eutectic alloy melt undercooled up to 100K. It is revealed that lamellar eutectics grow in a dendritic form in the Ag--Cu eutectic melt with undercooling equal to or greater than 76K. As undercooling increases, the remelted fraction of the primary eutectics during recalescence rises. The severe remelting and the subsequent ripening of the primary eutectic dendrites lead to the formation of anomalous eutectics.
Received: 24 September 2008
Revised: 16 October 2008
Accepted manuscript online:
(Whiskers and dendrites (growth, structure, and nonelectronic properties))
Fund: Project supported by the National
Natural Science Foundation of China (Grant No 50571068).
Cite this article:
Zhao Su(赵素), Li Jin-Fu(李金富), Liu Li(刘礼), and Zhou Yao-He(周尧和) Formation mechanism of anomalous eutectics in highly undercooled Ag--39.9 at%Cu alloys 2009 Chin. Phys. B 18 1917
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