Synthesis, characterization, and properties of nanophase TiO/sub 2/

Journal Article · Tue Nov 01 00:00:00 EST 1988 · J. Mat. Res.; (United States)

OSTI ID:6747017

Siegel, R W; Ramasamy, S; Hahn, H; Zongquan, L; Ting, L; Gronsky, R

Ultrafine-grained, nanophase samples of TiO/sub 2/ (rutile) were synthesized by the gas-condensation method and subsequent in situ compaction. The samples were studied by a number of techniques, including transmission electron microscopy, Vickers microharness measurements, and positron annihilation spectroscopy, as a function of sintering temperature. The nanophase compacts with average initial grain sizes of 12 nm were found to densify rapidly above 500 /sup 0/C, with only a small increase in grain size. The hardness values obtained by this method are comparable to or greater than those for coarser-grained compacts, but are achieved at temperatures 400 to 600 /sup 0/C lower than conventional sintering temperatures and without the need for sintering aids.

• Research Organization: Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439
• OSTI ID: 6747017
• Journal Information: J. Mat. Res.; (United States), Vol. 3:6
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
TITANIUM OXIDES
MECHANICAL PROPERTIES
SINTERING
CERAMICS
COMPACTING
CRACKS
MICROSTRUCTURE
SYNTHESIS
CHALCOGENIDES
CRYSTAL STRUCTURE
FABRICATION
OXIDES
OXYGEN COMPOUNDS
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication
360203 - Ceramics
Cermets
& Refractories- Mechanical Properties