Microstructural characterization of shock-modified zirconia powders

Conference · Sat Jan 01 04:00:00 EST 1983

OSTI ID:5970694

Hellmann, J R; Kuroda, K; Heuer, A H; Graham, R A

The internal structure of explosively shocked zirconia powders was examined using transmission electron microscopy. Lower-pressure (20 GPa) shocked powders exhibit crystallite size reduction accompanied by extensive deformation. High-pressure (27 GPa) shocked specimens exhibit a high degree of deformation as well as localized particle-size reduction accompanied by recrystallization to the high-temperature tetragonal zirconia polymorph. Recrystallization of heavily deformed monoclinic zirconia particles in both low- and high-pressure shocked powders could be induced by electron-beam heating. Ultra-fine (< 30 nm) tetragonal particles in the high-pressure shocked powders were resistant to recrystallization during electron-beam heating.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA); Case Western Reserve Univ., Cleveland, OH (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5970694
• Report Number(s): SAND-83-1588C; CONF-830719-3; ON: DE83015109
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
&amp; Refractories-- Structure &amp; Phase Studies
CHALCOGENIDES
CRYSTAL STRUCTURE
DEFORMATION
ELECTRON MICROSCOPY
EXPLOSIVE FORMING
FABRICATION
MATERIALS WORKING
MICROSCOPY
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
POWDERS
RECRYSTALLIZATION
SHOCK WAVES
TRANSITION ELEMENT COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES