Flash-induced spreading of metals on zirconia

SCRIPTA MATERIALIA

卷:176

Article

Kiniger, Giovanni^1,2  Sglavo, Vincenzo²  Jha, Shikhar K.^1,3  Raj, Rishi¹ 

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

[2] Univ Trento, Dept Ind Engn, I-38123 Trento, Italy

[3] Indian Inst Technol, Dept Mat Sci & Engn, Kanpur 208016, Uttar Pradesh, India

关键词: Flash sintering;    Metal-ceramic interfaces;    Metal matrix composites;   

DOI  :  10.1016/j.scriptamat.2019.09.013

来源: Elsevier

【 摘 要 】

Gold islands grown on yttria stabilized zirconia disperse into very small islands when the ceramic substrate is activated by current in a flash experiment. It is postulated that the gold beads spread into a nanometer thick continuous metal layer, which fragments into islands on a very fine scale when the field is switched off and the substrate returns to its original state. The experiments articulate the reach of flash experiments into the surface science regime where the metal merely reacts with the electronic structure of the ceramic surface, without the current flowing through the metal. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free