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

SCRIPTA MATERIALIA

卷:181

Article

Yoon, Bola¹  Avila, Viviana¹  Raj, Rishi¹  Jesus, Lilian M.^1,2 

[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

关键词: Entropy-stabilized oxides;    Reactive flash sintering;    Powder processing;    Crystal structure;    Metastable phases;   

DOI  :  10.1016/j.scriptamat.2020.02.006

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

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