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

Author(s)

Ojaimi, Christiane Lago ^[1] ; Ferreira, Julieta Adriana ^[1] ; Chinelatto, Adilson Luiz ^[2] ; Antonio Chinelatto, Adriana Scoton ^[2] ; de Jesus Agnolon Pallone, Eliria Maria ^[1]

Affiliation

^[1] Univ Sao Paulo, Dept Biosyst Engn, Av Duque Caxias Norte 225, BR-13635900 Pirassununga, SP - Brazil

^[2] Univ Estadual Ponta Grossa, Dept Mat Engn, UEPG, Av Gen Carlos Cavalcanti 4748, BR-84030900 Ponta Grossa, PR - Brazil

• Document type: Journal article
• Source: CERAMICS INTERNATIONAL; v. 46, n. 2, p. 2473-2480, FEB 1 2020.
• Web of Science Citations: 5

Abstract

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. (AU)

• FAPESP's process: 16/13256-1 - Study of the behavior of zirconia /alumina composites using flash sintering process and two-step sintering
• Grantee: Christiane Lago Ojaimi
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 15/07319-8 - Study ultra rapid sintering and low energy consumption: flash Sintering
• Grantee: Eliria Maria de Jesus Agnolon Pallone
• Support Opportunities: Regular Research Grants