Volume 74, Number 2, April 2006
|Page(s)||281 - 286|
|Section||Condensed matter: structural, mechanical and thermal properties|
|Published online||08 March 2006|
The transition of alpha- phase morphology in highly undercooled eutectic alloy
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: firstname.lastname@example.org
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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