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Indexed by:期刊论文

Date of Publication:2014-04-01

Journal:CERAMICS INTERNATIONAL

Included Journals:SCIE、EI、Scopus

Volume:40

Issue:3

Page Number:3989-3993

ISSN No.:0272-8842

Key Words:Al2O3-ZrO2 (3Y) ceramics; TiO2 dopants; Densification enhancement; Grain boundary feature; Liquid phases

Abstract:This study investigated the densification behaviors and microstructural evolution of Al2O3-ZrO2 (3Y) composite ceramics doped with four different amounts of TiO2 (0, 1, 4, and 8 wt%; denoted as 0T, 1T, 4T, and 8T, respectively) to clarify the effect of TiO2 dopants on densification. The shrinkage rate during densification increased with the increase in the amount of TiO2. The development of grain boundary feature was also examined. The undoped ceramic showed clean grain boundaries. Thin liquid grain boundary phases were observed in 1T, whereas large liquid phases were found on the grain boundary and at the junction pockets in 4T and 8T. The results were discussed in terms of the relationship between densification and grain boundary feature. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.