Lamella to Dendrite Transition in Solidifying Hypereutectic Fe–FeSi Alloy Films
- 1 February 1982
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 21 (2A) , L71-72
- https://doi.org/10.1143/jjap.21.l71
Abstract
The critical condition for the transition from lammellar to dendritic structures in hypereutictic Fe–FeSi alloy films, ranging in composition from 35 to 40 at·%Si, has been determined by means of unidirectional solidification. The critical condition is expressed by the following relation; G/R=1.6×107C0+4.7×106 where G is temperature gradient in a melt at the liquid-solid interface, R is the solidification rate and C 0 is the initial composition of Si in the melt. The liquid diffusion coefficient obtained using the above result was 4.1×10-5 cm2/s.Keywords
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