Superplasticity of yttria-stabilized tetragonal ZrO2 polycrystals

Journal Article · Tue Jul 01 04:00:00 EDT 1986 · Adv. Cer. Mat.; (United States)

OSTI ID:5027888

Wakai, F; Sakaguchi, S; Matsuno, Y

The uniaxial tensile deformation behavior of 3 molpercent Y/sub 2/O/sub 3/-tetragonal ZrO/sub 2/ polycrystals was studied at temperatures up to 1500 C in ambient atmosphere. The tensile specimens which were elongated at constant displacement rates from 0.00011/s to 0.00055/s at 1450 C exhibited unusually large deformation. The superplastically deformed specimens retained a bending strength of 976 MPa at room temperature. Steady creep rates measured at a constant load in the range of relatively small strains were described by a stress component, n, of 2 and by an activation energy of 586 + or - 40 kJ/mol. Large deformations during the accelerating creep were accompanied by extensive formation of cavities. 19 references.

• Research Organization: Government Industrial Research Institute, Nagoya, Japan
• OSTI ID: 5027888
• Journal Information: Adv. Cer. Mat.; (United States), Journal Name: Adv. Cer. Mat.; (United States) Vol. 1; ISSN ACEME
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
CHALCOGENIDES
CREEP
CRYSTAL STRUCTURE
CRYSTALS
DEFORMATION
GRAIN BOUNDARIES
GRAIN SIZE
MECHANICAL PROPERTIES
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PLASTICITY
POLYCRYSTALS
SIZE
STRAIN RATE
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES