THE SOLIDIFICATION OF DILUTE BINARY ALLOYS
Dilute binary alloys were solidified under controlled thermal conditions, and solute distributions, temperatures during freezing and melting, and the position and morphology of the solid-liquid interfaces were examined. Binary Zn, Sn, and Pb based alloys were investigated with solute additions of Ag/ sup 110/, Au/sup 198/, Sb/sup 124/, Tl/sup 204/, Sn/sup 113/, an d Zn/sup 65/. Approximately 150 cc of metal was used in each ingot. Appreciable solute segregation occurred in most of the ingots, depending on the solute concentrations, distribution coefficients, and freezing conditions of the alloys. Measurements were made of the general solute distribution by sectioning layers of material from the ingot circumference and counting the activity of each layer. Local segregation was detected by autoradiographic techniques. Freezing and melting curves for the same alloys were obtained by precision resistance thermometry. The curves are related to the corresponding measured solute distribution curves and those calculated from theoretical expressions. The position and morphology of solid-liquid interfaces during freezing were determined by both decanting and quenching techniques. The results indicate the manner in which freezing and remelting occurred under the conditions investigated. (auth)
- Research Organization:
- Dept. of Mines and Technical Surveys, Ottawa
- NSA Number:
- NSA-17-020500
- OSTI ID:
- 4696024
- Journal Information:
- Trans. AIME, Vol. Vol: 227; Other Information: Orig. Receipt Date: 31-DEC-63
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Related Subjects
ANTIMONY 124
CONTROL
COOLING
DIAGRAMS
DISTRIBUTION
GOLD 198
LAYERS
LEAD ALLOYS
LIQUID METALS
MEASURED VALUES
MELTING
NUMERICALS
RADIOAUTOGRAPHY
SEGREGATION
SILVER 110
SOLIDIFICATION
SOLIDS
SURFACES
TEMPERATURE
THALLIUM 204
THERMODYNAMICS
THERMOMETERS
TIN 113
TIN ALLOYS
TRACER TECHNIQUES
ZINC 65
ZINC ALLOYS