Reactive flash sintering of the entropy-stabilized oxide Mg0.2Ni0.2Co0.2Cu0.2Zn0.2O

Author(s)

Yoon, Bola ^[1] ; Avila, Viviana ^[1] ; Raj, Rishi ^[1] ; Jesus, Lilian M. ^{[1, 2]}

Affiliation

^[1] Univ Colorado, Dept Mech Engn, Mat Sci & Engn Program, Boulder, CO 80309 - USA

^[2] Fed Univ Sao Carlos UFSCar, Dept Phys, Grp Adv Funct Mat MAFA, BR-13565905 Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: SCRIPTA MATERIALIA; v. 181, p. 48-52, MAY 2020.
• Web of Science Citations: 0

Abstract

We investigate the reactive flash sintering of Mg0.2Ni0.2Co0.2Cu0.2Zn0.2O precursor powders prepared by a polymeric synthesis route. The flash experiments were performed at a constant heating rate of 10 degrees C min(-1) with electric fields from 15 to 60 V cm(-1). The single-phase rock-salt structure was obtained in just a few seconds at furnace temperatures as low as 500 degrees C, under an electric field of 60 V cm(-1) and a current density of 150 mA mm(-2). Success at processing an entropy-driven phase in a remarkably short time and low furnace temperature demonstrates the potential of reactive flash sintering for producing entropy-stabilized materials. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 18/19370-6 - Electric-Field Assisted Processing of Electroceramics: (micro)structural characteristics and dielectric properties
• Grantee: Lilian Menezes de Jesus
• Support Opportunities: Scholarships abroad - Research