Dynamic behavior of zirconia ceramics in uniaxial compression

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 1991

OSTI ID:7164974

Ghatuparthi, S

A novel Split Hopkinson Pressure Bar (SHPB) method called the stress reversal Hopkinson technique developed at UCSD, is successfully used to subject ceramic samples to predetermined compressive-stress pulses. Transformation plasticity in magnesia-partially stabilized zirconia (Mg-PSZ) and yttria-tetragonal zirconia polycrystal (Y-TZP) is investigated. The samples tested in SHPB show a trilinear stress-strain behavior. The longitudinal and transverse strains are measured by strain gages mounted on the samples. The lateral surfaces of Mg-PSZ samples show extensive surface rumpling and microcracking parallel to the loading axis after the test. Reloading of these samples to higher stress levels did not reveal additional inelasticity. Cuboid samples loaded initially to attain transformation saturation, are then reloaded in a direction perpendicular to the first loading. The second loading produces additional inelasticity and microcracking (parallel to this loading direction), indicating the formation of transformation texture in each loading under uniaxial compression.

• Research Organization: California Univ., San Diego, CA (United States)
• OSTI ID: 7164974
• 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
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COMPRESSION STRENGTH
CRACKS
DYNAMIC LOADS
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MECHANICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PLASTICITY
STABILIZATION
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES