Grain refinement in solidification of highly undercooled eutectic Ni–Si alloy☆
Grain refinement in solidification of highly undercooled eutectic Ni–Si alloy☆
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DOI：
10.1016/j.matlet.2006.06.028
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发表时间：
2007-02
影响因子：
3
通讯作者：
Yiping Lu;Feng Liu;Gencang Yang;Haipeng Wang;Yaohe Zhou
中科院分区：
文献类型：
--
作者：
Yiping Lu;Feng Liu;Gencang Yang;Haipeng Wang;Yaohe Zhou
Substantial undercooling up to 550 K (0.386TE, with TEas the melting point) was achieved in eutectic Ni78.6Si21.4alloy melt using glass fluxing combined with cyclic superheating. Accordingly, a particular refined microcrystalline morphology is obtained in the as-solidified structure. The physical mechanism of the grain refinement subjected to high undercooling is interpreted in terms of the classical nucleation theory and LKT/BCT model. It was concluded that the above refinement can be ascribed to the substantially increased nucleation rate under high undercooling.
