EFFECT OF ZIRCONIA (3-MOL-PERCENT) YTTRIA) ADDITIVE ON MECHANICAL-PROPERTIES AND STRUCTURE OF ALUMINA CERAMICS

Authors
GRIGORYEV ON FIRSTOV SA BABIY OA ORLOVSKAYA NA HOMENKO GE
Citation
On. Grigoryev et al., EFFECT OF ZIRCONIA (3-MOL-PERCENT) YTTRIA) ADDITIVE ON MECHANICAL-PROPERTIES AND STRUCTURE OF ALUMINA CERAMICS, Journal of Materials Science, 29(17), 1994, pp. 4633-4638
Citations number
16
Categorie Soggetti
Material Science
Journal title
Journal of Materials Science → ACNP
ISSN journal
00222461
Volume
29
Issue
17
Year of publication
1994
Pages
4633 - 4638
Database
ISI
SICI code
0022-2461(1994)29:17<4633:EOZ(YA>2.0.ZU;2-O
Abstract
The effects of ZrO2-3 mol % Y2O3 additives containing 7.3, 15, 23.3 an d 32 vol % of ZrO2 on sigma(f), K(lc), H(v) and the microstructure of hot-pressed alumina-based ceramics were investigated. The presence of the m-, t- and t'-ZrO2 phases was discovered by using X-ray diffractio n and transmission electron microscopy. An inhomogeneous distribution of Y2O3 in the ZrO2 grains was observed. The variation of the mechanic al properties of the ceramics is explained by the influence of differe nt toughening mechanisms and by a change in the structure of the mater ial.