Statistical Analysis of Electrothermal Damage Characteristics of Nanoelectrode Under High Electric Fields

The insulation of devices under high electric field is the key to affect the performance and life of devices and equipment. This paper studies the electrothermal damage effect of metal electrodes at the nanoscale. The numerical simulation method based on electrodynamic coupling molecular dynamics and particle simulation is used to simulate the initial process of electrothermal damage of nanoelectrode during vacuum pre-breakdown under the interaction of multiple fields. Based on the correlation and quantitative relationship analysis of 15 multivariate variables of microscopic crystal structure parameters and macroscopic physical properties of different electrode materials, the nonlinear quantitative prediction model of electrothermal damage characteristics of nanoelectrode was obtained, which was in line with the actual physical significance and the goodness of calibration fit was 99.6%. The results can be used to reveal the universal physical mechanism of electrode damage during pre-breakdown.