Homogeneous crystal nucleation in binary metallic melts

Journal Article · Thu Dec 01 04:00:00 EST 1983 · Acta Metall.; (United States)

DOI:https://doi.org/10.1016/0001-6160(83)90019-6· OSTI ID:6685416

Thompson, C V; Spaepen, F

A method for calculating the homogeneous crystal nucleation frequency in binary metallic melts is developed. The free energy of crystallization is derived from regular solution models for the liquid and solid and used with model-based estimates of the interfacial tension to calculate the nucleation frequency from classical theory. The method can account for the composition dependence of maximum undercooling observed in experiments on small droplet dispersions. It can also be used to calculate the driving force for crystal growth and obtain more precise estimates of the homogeneous nucleation frequency in glass-forming alloys. This method requires only knowledge of the phase diagram and a few readily available thermodynamic quantities as input data.

• Research Organization: Div. of Applied Sciences, Harvard Univ., Cambridge, MA
• OSTI ID: 6685416
• Journal Information: Acta Metall.; (United States), Journal Name: Acta Metall.; (United States) Vol. 31:12; ISSN AMETA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOY SYSTEMS
BINARY ALLOY SYSTEMS
CALCULATION METHODS
CRYSTAL GROWTH
CRYSTAL-PHASE TRANSFORMATIONS
CRYSTALLIZATION
DIAGRAMS
DISPERSIONS
ELEMENTS
ENERGY
ENTHALPY
FLUIDS
FREE ENERGY
LIQUID METALS
LIQUIDS
MATHEMATICAL MODELS
METALS
MIXTURES
NUCLEATION
PHASE DIAGRAMS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SOLUTIONS
SURFACE PROPERTIES
SURFACE TENSION
THERMODYNAMIC PROPERTIES
TRANSITION HEAT