X-ray-diffraction line-broadening studies on shock-loaded TiO/sub 2/ and Al/sub 2/O/sub 3/

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

OSTI ID:5863690

Morosin, B; Graham, R A

Rutile and alumina powder samples have been cold pressed into compacts of about 50% crystal density, subjected to controlled shock loading with peak pressures in the powders between 4 and 27 GPa, and preserved for post shock study. The broadened X-ray diffraction peak profiles have been evaluated to determine residual lattice strain and coherent crystallite sizes. Rutile shows residual strain values near 2 x 10/sup -3/ with values for alumina near 4.5 x 10/sup -3/ at peak shock-loading pressures of 20 to 27 GPa. Coherent crystallite size reduction is found; in particular, for alumina, size appears to decrease linearly with pressure. Annealing studies on shock-loaded rutile show a gradual decrease in strain and increase in crystallite size with temperature. Effects of crystalline anisotropy are noted.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5863690
• Report Number(s): SAND-83-1429C; CONF-830719-35; ON: DE83016161
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
ANISOTROPY
ANNEALING
CHALCOGENIDES
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIFFRACTION
DYNAMIC LOADS
GRAIN SIZE
HEAT TREATMENTS
LINE BROADENING
MATERIALS
MICROSTRUCTURE
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
POWDERS
RADIOACTIVE MATERIALS
RADIOACTIVE MINERALS
RUTILE
SCATTERING
SHOCK WAVES
SIZE
STRAINS
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION