Microstructural analysis of ZrO2/Al2O3 composite: Flash and conventional sintering

In this study, the flash sintering of a ZrO2/25 vol% Al2O3 (ZrO2/Al2O3) composite was analysed by varying the electric field and current density. The best sample obtained with flash sintering (FS) was compared with samples conventionally sintered via single-step (SS) and two-step (TS) techniques. Th...

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Bibliographic Details
Published inCeramics international Vol. 46; no. 2; pp. 2473 - 2480
Main Authors Ojaimi, Christiane Lago, Ferreira, Julieta Adriana, Chinelatto, Adilson Luiz, Chinelatto, Adriana Scoton Antonio, Pallone, Eliria Maria de Jesus Agnolon
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.02.2020
Subjects
Field-assisted sintering
Grain size
Two-step sintering
Zirconia/alumina
Grain size
Zirconia/alumina
Field-assisted sintering
Two-step sintering
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Summary:In this study, the flash sintering of a ZrO2/25 vol% Al2O3 (ZrO2/Al2O3) composite was analysed by varying the electric field and current density. The best sample obtained with flash sintering (FS) was compared with samples conventionally sintered via single-step (SS) and two-step (TS) techniques. The results showed that an electric field of 200 Vcm−1 with a current density of 106 mAmm−2 produced the optimal results for FS. These conditions resulted in a high relative density with a grain size comparable to that obtained with SS while utilizing a much lower furnace temperature than that for SS of this composite.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2019.09.241