Cellular spacings - I. Steady-state growth

Journal Article · Fri Apr 01 04:00:00 EST 1988 · Acta Metall.; (United States)

DOI:https://doi.org/10.1016/0001-6160(88)90169-1· OSTI ID:6829773

Eshelman, M A; Seetharaman, V; Trivedi, R

Directional solidification studies were carried out in the succinonitrile-acetone and pivalic acid-ethanol systems in order to study the variation in average cellular spacing with velocity. Three distinct behaviors were observed under steady-state growth conditions. For velocities near the critical velocity for planar interface instability, cellular spacing decreased with an increase in velocity. However, at velocities near the cell-dendrite transition the cell spacing increased sharply. Beyond this transition region, the cell or dendrite spacing decreased with further increases in velocity. These experimental observations have been explained by using the current theoretical models of cell-dendrite growth. In addition, a finite band of velocities was identified in which both cellular and dendritic structures were found to be stable. A hysteresis effect was observed in the cell-dendrite transition indicating that the cell-dendrite bifurcation is subcritical.

• Research Organization: Ames Lab. - USDOE and the Dept. of Materials Science and Engineering, Iowa State Univ., Ames, IA (US)
• OSTI ID: 6829773
• Journal Information: Acta Metall.; (United States), Journal Name: Acta Metall.; (United States) Vol. 36:4; ISSN AMETA
• Country of Publication: United States
• Language: English

Related Subjects

550200* -- Biochemistry
59 BASIC BIOLOGICAL SCIENCES
ANIMAL CELLS
BIOLOGICAL PATHWAYS
CELL DIFFERENTIATION
CELL PROLIFERATION
CELL TRANSFORMATIONS
CRYSTAL GROWTH METHODS
CRYSTALS
DATA
DENDRITES
DENDRITIC WEB GROWTH METHOD
HYSTERESIS
IMMOBILIZED CELLS
INFORMATION
NERVE CELLS
NUMERICAL DATA
SOMATIC CELLS
THEORETICAL DATA