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Microstructural Coarsening of Zirconia‐Toughened Alumina Composites
Author(s) -
Casellas D.,
Nagl M. M.,
Llanes L.,
Anglada M.
Publication year - 2005
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2005.00374.x
Subject(s) - materials science , microstructure , composite material , fracture toughness , toughening , cubic zirconia , toughness , grain size , grain growth , ceramic
In this work, the microstructural coarsening induced by heat treatment at temperatures between 1450° and 1750°C, for different zirconia‐toughened alumina (ZTA) materials has been studied. In doing so, grain growth kinetics and fracture toughness have been documented and analyzed. Obtained results are discussed and rationalized in terms of microstructural effects on zirconia clustering and transformability (content and size) and operative toughening mechanisms. Based on the relatively broad microstructural and toughness ranges exhibited by the ZTA composites developed and characterized, it is concluded that fracture toughness tailoring through microstructure control may be effectively implemented for these materials.