Origins of planar, concave, and convex boundaries during exaggerated grain growth

Journal Article · Thu May 01 00:00:00 EDT 1986 · J. Am. Ceram. Soc.; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1986.tb04776.x· OSTI ID:5336302

Searcy, A W

A new surface thermodynamic theory is used to show that exaggerated grain growth is driven by reductions in grain boundary and dislocation free energies produced when a larger grain sweeps out a volume element formerly occupied by small grains. Whether the advancing boundary is planar, concave, or convex depends on the relative rates of ledge nucleation and growth, on the growth direction, and on whether growth occurs at screw dislocations.

• Research Organization: Materials and Molecular Research Div., Lawrence Berkeley Lab., Univ. of California, Berkeley, CA 94720
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5336302
• Journal Information: J. Am. Ceram. Soc.; (United States), Vol. 69:5
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERAMICS
GRAIN GROWTH
FREE ENERGY
GRAIN BOUNDARIES
NUCLEATION
SCREW DISLOCATIONS
THERMODYNAMICS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DISLOCATIONS
ENERGY
LINE DEFECTS
MICROSTRUCTURE
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES
360202* - Ceramics
Cermets
& Refractories- Structure & Phase Studies