Theory of the energetics and nonclassical nucleation for the tetragonal-monoclinic transformation of zirconia

Conference · Mon Sep 01 00:00:00 EDT 1986

OSTI ID:6948321

Chan, S K

The energetics of the martensitic tetragonal-monoclinic transformation of zirconia are analyzed in terms of symmetry-adapted strains and elastic moduli. A nonclassical theory of nucleation is developed based on a solution of the time-dependent Ginzburg-Landau equation in conjunction with a Cahn-Hilliard type free energy functional for a shape-invariant diffused interface profile between the transformed and the parent phases. The critical radius of nucleation is derived as a function of temperature and applied stresses. The physical implications of the results towards both homogeneous and heterogeneous nucleations are discussed.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6948321
• Report Number(s): CONF-860968-4; ON: DE87004720
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
CHALCOGENIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
EQUATIONS
MONOCLINIC LATTICES
NUCLEATION
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
TETRAGONAL LATTICES
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES