Sintering, phase stability and room temperature mechanical properties of c-ZrO2 ceramics with TiO2 addition


Tekeli S., Gural A.

Materials and Design, vol.28, no.5, pp.1707-1710, 2007 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 28 Issue: 5
  • Publication Date: 2007
  • Doi Number: 10.1016/j.matdes.2006.03.004
  • Journal Name: Materials and Design
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.1707-1710

Abstract

An investigation has been carried out into the effect of TiO2 addition on the sintering, phase stability and room temperature mechanical properties of cubic zirconia (c-ZrO2). c-ZrO2 specimens containing TiO2 addition up to 10 wt% were produced by colloidal processing and pressureless sintering. The sintered density of the specimens decreased with increasing TiO2 content up to 1 wt% and further increase in TiO2 content led to a increase in the sintered density. XRD results showed that when the TiO2 amount was less than 5 wt%, the specimens were entirely single cubic phase; further addition of TiO2 (5 wt% or more) destabilized cubic zirconia phase and caused the formation of tetragonal phase. The amount of tetragonal phase increased with increasing TiO2 content in c-ZrO2 matrix. The room temperature mechanical properties of flexural strength and fracture toughness both increased with increasing TiO2 content. © 2006 Elsevier Ltd. All rights reserved.