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Peri‐eutectic transition during crystallization of undercooled ternary alloy melt
Author(s) -
Ruan Y.
Publication year - 2013
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201248277
Subject(s) - supercooling , eutectic system , materials science , nucleation , crystallization , alloy , ternary operation , eutectic bonding , thermodynamics , metallurgy , physics , computer science , programming language
Peri‐eutectic transition was investigated in terms of the dependence of crystallization behavior on undercooling in Cu–Ag–Ge ternary alloy composed of (Ag), ζ(Cu 5 Ge), and ε 2 (Cu 3 Ge) phases. (Ag + ε 2 ) pseudobinary eutectic is the product of both peri‐eutectic and subsequent pseudobinary eutectic transitions. Nanoscale structure of anomalous (Ag + ε 2 ) pseudobinary eutectic forms at the maximum undercooling, which is ascribed to the independent nucleation and growth from the liquid. The decrease of (Ag + ε 2 ) pseudobinary eutectic at a high undercooling is due to that the phase transition happening at the beginning solidification stage proceeds more thoroughly at a higher undercooling.