Abstract
Substantial undercooling up to 550 K (0.386TE, with TE as the melting point) was achieved in eutectic Ni78.6Si21.4 alloy 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.
Original language | English |
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Pages (from-to) | 987-990 |
Number of pages | 4 |
Journal | Materials Letters |
Volume | 61 |
Issue number | 4-5 |
DOIs | |
State | Published - Feb 2007 |
Keywords
- Grain refinement
- Microstructure
- Solidification
- Undercooling