An unusual twin structure in transformed precipitates in Y-PSZ single crystals

Journal Article · Fri Dec 31 23:00:00 EST 1993 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1994.tb06957.x· OSTI ID:142235

Fernandez, J M; Melendo, M J; Rodriquez, A D ^[1]; Heuer, A H ^[2]; Hayakawa, Motozo ^[3]

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1. Univ. de Sevilla (Spain). Dept. de Fisica de la Materia Condensada
2. Case Western Reserve Univ., Cleveland, OH (United States). Dept. of Materials Science and Engineering
3. Tottori Univ. (Japan). Dept. of Mechanical Engineering

Mosaic-like monoclinic ZrO{sub 2} particles form in TEM thin foils in 3.4-mol %-Y{sub 2}O{sub 3}-partially-stabilized ZrO{sub 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{sub 2} precipitates which had formed during aging. These monoclinic particles contain (100){sub m} and (110){sub 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.

• Sponsoring Organization: USDOE
• OSTI ID: 142235
• Journal Information: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 1 Vol. 77; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTAL-PHASE TRANSFORMATIONS
EXPERIMENTAL DATA
MICROSTRUCTURE
TRANSMISSION ELECTRON MICROSCOPY
YTTRIUM OXIDES
ZIRCONIUM OXIDES