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Solidification behaviour of binary organic eutectic alloys
Author(s) -
Rai U. S.,
Shekhar H.
Publication year - 1994
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.2170290415
Subject(s) - eutectic system , acenaphthene , nucleation , crystallization , acetanilide , mole fraction , materials science , thermodynamics , enthalpy of fusion , chemistry , chemical engineering , alloy , organic chemistry , metallurgy , naphthalene , physics , melting point , engineering , composite material
The phase diagrams of binary organic faceted‐faceted systems of p‐dibromobenzene with acenaphthene, p‐chloronitrobenzene and acetanilide show the formation of a simple eutectic with 0.53, 0.61, and 0.64 mole fraction of p‐dibromobenzene, respectively. Crystallization data, determined by the capillary method, suggest that the eutectics of p‐dibromobenzene with acenaphthene and p‐chloronitrobenzene solidify with alternate nucleation mechanism and the crystallization of the eutectic of p‐dibromobenzene‐acetanilide system takes place by the side‐by‐side growth of the phases involved. With a view to throw light on the thermodynamic behaviour of eutectic alloys of non‐metals, heats of fusion of their transparent organic analogues and their eutectics were determined, and using these values different thermodynamic parameters were calculated. The microstructures of the eutectics show their typical characteristic features.