Energy release and transformation of shock-modified zirconia upon annealing to 1550/sup 0/C

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

OSTI ID:5616455

Hammetter, W F; Hellmann, J R; Graham, R A; Morosin, B

The shock-modified powder samples described by Morosin et al (this meeting) have been studied in DTA measurements to 1550/sup 0/C to determine the influence of shock modification on energy release and on the monoclinic to tetragonal transformation. Energy release over that of control samples is observed to begin at approx. 200/sup 0/C and continues to the onset of the transformation. The phase transformation temperature is at approx. 1170/sup 0/C and is unaffected by shock-loading pressure up to 16 GPa. Above that pressure, the transformation temperature is lowered as pressure increases. The decrease in temperature correlates with both the decrease in crystallite size and retention of the tetragonal phase indicated by x-ray diffraction.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5616455
• Report Number(s): SAND-83-0804C; CONF-830719-52; ON: DE83017801
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
CHALCOGENIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
DIFFERENTIAL THERMAL ANALYSIS
DYNAMIC LOADS
ENERGY
MONOCLINIC LATTICES
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
POWDERS
SHOCK WAVES
STORED ENERGY
TETRAGONAL LATTICES
THERMAL ANALYSIS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES