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Grain‐Boundary Phase Transformations During Aging of a Partially Stabilized ZrO 2 ‐ A Liquid‐Phase Analogue of Diffusion‐Induced Grain‐Boundary Migration (DIGM)(?)
Author(s) -
BUTLER E. P.,
HEUER A. H.
Publication year - 1985
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1985.tb15297.x
Subject(s) - grain boundary , grain boundary diffusion coefficient , materials science , phase (matter) , diffusion , silicate , effective diffusion coefficient , mineralogy , transmission electron microscopy , ternary operation , metallurgy , chemical engineering , microstructure , thermodynamics , chemistry , nanotechnology , organic chemistry , medicine , computer science , programming language , physics , radiology , magnetic resonance imaging , engineering
The microchemical/microstructural evolution of grain‐boundary regions in a ternary (Ca, Mg)‐partially‐stabilized ZrO 2 during aging at 1400°C has been studied by transmission electron microscopy. Two distinct grain‐boundary transformation products, both of which involve single‐phase cubic (c)‐ZrO 2 zones adjacent to grain boundaries, have been identified. An amorphous silicate grain‐boundary phase, whose composition changes during aging, is also present. One of the two grain‐boundary reactions involves grain‐boundary migration by a solution/reprecipitation process and can be termed reactive film migration; it may be a liquid‐phase analogue of diffusion‐induced grain‐boundary migration.