Mechanical and microstructural aspects of the high temperature plastic deformation of yttria-stabilized zirconia polycrystals

Journal Article · Thu Oct 01 04:00:00 EDT 1992 · Acta Metallurgica; (United States)

DOI:https://doi.org/10.1016/0956-7151(92)90342-C· OSTI ID:7018543

Bravo-Leon, A; Jimenez-Melendo, M; Dominquez-Rodriquez, D ^[1]

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1. Dept. de Fisica de la Materia Condensada, Instituto de Ciencia de Materiales, Aptdo. 1065, 41080 Sevilla (Spain)

In this paper the high-temperature plastic deformation of 6 mol% Y[sub 2])[sub 3]-stabilized ZrO[sub 2] polycrystals with grain sizes of 1.8, 3.4 and 6.3 [mu]m are studied in compression between 1350 and 1450[degrees]C in air at constant strain rate (between 1 [times] 10[sup [minus] 5] and 2 [times] 10[sup [minus]4]S[sup [minus]1]) and under constant load (between 5 and 90 MPa). Two mechanical behaviors were observed depending on strain rate or stress levels: grain boundary sliding controlled by cation bulk diffusion, with an activation energy of 560 kJ/mol, and intergranular cavitation without plastic deformation of the grains.

• OSTI ID: 7018543
• Journal Information: Acta Metallurgica; (United States), Journal Name: Acta Metallurgica; (United States) Vol. 40:10; ISSN 0001-6160; ISSN AMETAR
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ACTIVATION ENERGY
AIR
CHALCOGENIDES
COMPRESSION
CRYSTAL STRUCTURE
CRYSTALS
DIFFUSION
ENERGY
FLUIDS
GASES
GRAIN SIZE
MECHANICAL PROPERTIES
MEDIUM PRESSURE
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
POLYCRYSTALS
SIZE
STABILIZATION
STRAIN RATE
STRESSES
TEMPERATURE RANGE
TEMPERATURE RANGE 1000-4000 K
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES