Sintering properties of zirconia-based ceramic composite. (8th December 2014)

• Record Type: Journal Article
• Authors: Chew, W. J. Kelvin; Ramesh, S.; Wong, Y. H.; Misran, H.; Yusuf, F.; Tan, C. Y.; Amiriyan, M.; Tolouei, R.; Teng, W. D.
• Is Part Of: Materials research innovations. Volume 18:Number 6(2014)
• Page Start: S6-105
• Page End: S6-108
• Publication Date: 2014-12-08
• Subjects: Materials -- Research -- Periodicals; Matériaux -- Recherche -- Périodiques; 620.1105
• DOI: 10.1179/1432891714Z.000000000939
• Languages: English
• ISSNs: 1432-8917

Abstract

<abstract> <title> <x content-type="archive" xml:space="preserve">Abstract</x> </title> <p>This study examines the effects of different ZrB₂ content on various mechanical properties and electrical conductivity of ZrB₂/Y-TZP composite. Composites with ZrB₂ content of up to 20 wt-% were particularly beneficial at the lower sintering temperature range by achieving greater densification and better hardness than Y-TZP monolith. In contrast to the trends estimated from rule of mixture, the increment of ZrB₂ content did not result in any significant improvement in the elastic modulus and hardness of the zirconia composites. Nevertheless, all composites showed tremendous improvement in fracture toughness compared with monolithic Y-TZP and thus, suggested that other toughening mechanisms were operative besides transformation toughening of zirconia. Incorporation of ZrB₂ up to mass fraction of 20 wt-% into Y-TZP generally did not affect the tetragonal phase stability of zirconia. Significant reduction of electrical resistivity of the composites was achieved with ZrB₂ content of 20 wt-% and sintering temperature of 1400°C.</p> </abstract>