Premium
An Unusual Twin Structure in Transformed Precipitates in Y‐PSZ Single Crystals
Author(s) -
Fernández Julian Martínez,
Melendo Manuel Jiménez,
Rodríguez Arturo Domínguez,
Heuer Arthur H.,
Hayakawa Motozo
Publication year - 1994
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.1151-2916.1994.tb06957.x
Subject(s) - monoclinic crystal system , tetragonal crystal system , materials science , crystallography , macle , foil method , crystal twinning , microstructure , diffusionless transformation , trigonal crystal system , lattice (music) , martensite , crystal structure , mineralogy , composite material , chemistry , physics , acoustics
Mosaic‐like monoclinic ZrO 2 particles form in TEM thin foils in 3.4‐mol%‐Y 2 O 3 ‐partially‐stabiIized ZrO 2 (Y‐PSZ) single crystals aged for 150 h at 1600°C. These particles transformed martensitically during TEM foil preparation; the parent phase existed as internally twinned tetragonal ZrO 2 precipitates which had formed during aging. These monoclinic particles contain (100) m and {110} m transformation twins, and the twin variants have uniform thickness. The origin of this transformation microstructure, the lattice correspondences, and the applicability of the invariant plane strain model of martensitic transformations are discussed.