Interdendritic spacing: Pt. 1. Experimental studies. [Succinonitrile-acetone]
Journal Article
·
· Metall. Trans., A; (United States)
Directional solidification experiments have been carried out in a succinonitrile-5.5 mol pct acetone system to characterize dendrite tip radius and interdendrite spacings as functions of growth rate and temperature gradient in the liquid. A maximum in primary dendrite spacing as a function of growth rate is observed; this maximum is found to occur at the dendrite-cellular transition velocity. A scaling law is shown to exist between the secondary dendrite arm spacing, lambda2, near the tipe and the dendrite tip radius, /RHO/, which is lambda//RHO/ = 2.2 plus or minus 0.3. Experimental results on /RHO/ have been found to agree with the theoretical model based on the marginal stability criterion.
- Research Organization:
- Ames Laboratory-USDOE, Ames, IA
- OSTI ID:
- 5028470
- Journal Information:
- Metall. Trans., A; (United States), Journal Name: Metall. Trans., A; (United States) Vol. 15A:6; ISSN MTTAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ACETONE
ALLOYS
CRYSTAL GROWTH
CRYSTAL GROWTH METHODS
CRYSTAL-PHASE TRANSFORMATIONS
CRYSTALLIZATION
CRYSTALS
DENDRITES
DISTRIBUTION
KETONES
MATHEMATICAL MODELS
NITRILES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHASE TRANSFORMATIONS
SOLIDIFICATION
SPATIAL DISTRIBUTION
STABILITY
TEMPERATURE GRADIENTS
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ACETONE
ALLOYS
CRYSTAL GROWTH
CRYSTAL GROWTH METHODS
CRYSTAL-PHASE TRANSFORMATIONS
CRYSTALLIZATION
CRYSTALS
DENDRITES
DISTRIBUTION
KETONES
MATHEMATICAL MODELS
NITRILES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHASE TRANSFORMATIONS
SOLIDIFICATION
SPATIAL DISTRIBUTION
STABILITY
TEMPERATURE GRADIENTS