Title :
The microstructure and lattice parameters of the zirconia nanoceramics sintered in vacuum
Author_Institution :
Tomsk Polytech. Univ., Russia
fDate :
26 June-3 July 2004
Abstract :
The peculiarities of the distributions of grain and pore sizes in the zirconia ceramics sintered in vacuum after dry compacting nanopowders under powerful ultrasound action (PUA) were investigated using optical microscopy and SEM techniques. The PUA during zirconia nanopowder compaction essentially influences not only the green body densification, but also the sintered ceramics microstructure and properties. Analysis of the XRD data showed the linear dependence of the lattice parameters of zirconia monoclinic and cubic phases which can be explained by a coexistence of two phases in a nanocrystallite.
Keywords :
X-ray diffraction; ceramics; compaction; crystal structure; crystallites; densification; grain size; lattice constants; nanoparticles; optical microscopy; porosity; porous materials; scanning electron microscopy; sintering; ultrasonic applications; zirconium compounds; SEM techniques; XRD data; ZrO2; cubic phases; dry compacting; grain distributions; green body densification; lattice parameters; microstructure; monoclinic phases; nanocrystallite; nanopowders; optical microscopy; pore size distributions; powerful ultrasound action; vacuum sintering; zirconia nanoceramics; Ceramics; Compaction; Lattices; Microstructure; Nanoparticles; Optical microscopy; Scanning electron microscopy; Ultrasonic imaging; Vacuum technology; X-ray scattering;
Conference_Titel :
Science and Technology, 2004. KORUS 2004. Proceedings. The 8th Russian-Korean International Symposium on
Print_ISBN :
0-7803-8383-4
DOI :
10.1109/KORUS.2004.1555694
