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Solidification behaviour of eutectic and monotectic alloys: Succinonitrile ‐ acenaphthene system
Author(s) -
Rai U. S.,
Shekhar H.
Publication year - 1990
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170251212
Subject(s) - succinonitrile , eutectic system , materials science , lamellar structure , mole fraction , supercooling , crystallization , eutectic bonding , thermodynamics , directional solidification , microstructure , metallurgy , chemistry , physics , electrode , electrolyte
The phase diagram of succinonitrile‐acenaphthene system, determined by the thaw‐melt method, shows the formation of a eutectic at 0.99 mole fraction of succinonitrile and a monotectic at 0.35 mole fraction of succinonitrile with a large miscibility gap. The linear velocity of crystallization ( v ) of the pure components, eutectic and monotectic, studied at different undercooling (Δ T ) by measuring the rate of movement of the growth front in a capillary, suggests that crystallization data obey the equation: v = u (Δ T ) n where u and n are constants depending on the nature of solidification of the compounds. While the microstructural investigation of eutectic shows broken lamellar and eutectic dendrite‐type morphologies that of monotectic exhibits fibrous and broken fibrous‐type microstructures depending on the rate of solidification.