SINTERING AND FRACTURE-TOUGHNESS OF ALUMINA-ZIRCONIA COMPOSITES

Authors
BISWAS NC CHAUDHURI SP
Citation
Nc. Biswas et Sp. Chaudhuri, SINTERING AND FRACTURE-TOUGHNESS OF ALUMINA-ZIRCONIA COMPOSITES, INDIAN JOURNAL OF ENGINEERING AND MATERIALS SCIENCES, 5(5), 1998, pp. 307-311
Citations number
13
Categorie Soggetti
Engineering,"Material Science
Journal title
INDIAN JOURNAL OF ENGINEERING AND MATERIALS SCIENCES → ACNP
ISSN journal
09714588
Volume
5
Issue
5
Year of publication
1998
Pages
307 - 311
Database
ISI
SICI code
0971-4588(1998)5:5<307:SAFOAC>2.0.ZU;2-N
Abstract
Microstructure, grain growth and fracture toughness of alumina-zirconi a composites prepared from commercial grade technical alumina and impo rted zirconia were studied. Ostwald ripening and coalescence of ZrO2 a nd Al2O3 grains were observed. Fracture toughness of the composites ha ving different phase assemblages seemed to be controlled by the transf ormation toughening and microcracking toughening mechanisms. Highest f racture toughness of the order of 5.5 MN m(-3/2) was found for the com posite prepared from a batch of Al2O3 + 29.5% ZrO2 + 1.5% Y2O3.