| Issue |
Europhys. Lett.
Volume 74, Number 2, April 2006
|
|
|---|---|---|
| Page(s) | 281 - 286 | |
| Section | Condensed matter: structural, mechanical and thermal properties | |
| DOI | https://doi.org/10.1209/epl/i2005-10525-0 | |
| Published online | 08 March 2006 | |
The transition of alpha-
phase morphology in
highly undercooled eutectic 
alloy
1
State Key Laboratory of Solidification Processing Northwestern Polytechnical University - Xi'an 710072, PRC
2
Department of Applied Physics, Northwestern Polytechnical University Xi'an 710072, PRC
Corresponding author: luyiping80818@hotmail.com
Received:
19
October
2005
Accepted:
20
February
2006
High undercooling up to 550
(0.39 
was achieved in eutectic
melt using glass fluxing combined with the cyclic
superheating. According to the microstructure evolution with the initial
undercooling, surprisingly, a transition from non-faceted to faceted phase
occurs for the as-solidified morphology of the alpha- phase at the
undercooling of 390. On the basis of the entropy of fusion criterion and
the interface kinetics, this interesting morphology transition at high
undercooling is analyzed.
PACS: 61.82.Bg – Metals and alloys / 68.55.Jk – Structure and morphology; thickness; crystalline orientation and texture / 68.35.Ct – Interface structure and roughness
© EDP Sciences, 2006
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