Unusual electrode-dependent deformation of 3Y-TZP induced by weak electric current in oxygen-lean atmosphere

The plastic deformation behavior of 3Y-TZP with weak electric current in oxygen-lean atmosphere was investigated. The results demonstrated that a weak electric current (I=1 A) can significantly promote the plastic deformation of 3Y-TZP at furnace temperature of 1200 degrees C and a strain rate of 6.67 x10(-4) s(-1). As the electric current increases (1-5 A), the flow stress of plastic deformation has a significant decrease. Especially, a remarkable electrode-dependent deformation near the cathode side was observed for the first time. This unusual phenomenon is mainly attributed to the enhancement of the cation diffusion caused by the electric current-induced electrochemical reduction reaction. In addition, this phenomenon may provide a new method to control the local plastic deformation by controlling the electrode direction and the deformation atmosphere. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Automated summary

The plastic deformation behavior of 3Y-TZP under weak electric current in an oxygen-lean atmosphere was investigated in this study. The results showed that the plastic deformation can be significantly promoted by weak electric current, with an increase in current leading to a decrease in flow stress. The observation of electrode-dependent deformation near the cathode side was particularly noteworthy.