|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Phase Stability, Phase Transformations, and Reactive Phase Formation in Electronic Materials XVII
||Alloy Phase Stability under Electric Currents
||Shih-Kang Lin, Yu-chen Liu
|On-Site Speaker (Planned)
The effects of electric currents upon materials have been one of the most intriguing physical phenomena, which involves Joule heating, thermoelectric effects, and those involving atomic motions as known to be the electromigration (EM) effect. However, there are still abnormal experimental observations, which cannot be explained with the existing theories. For instance, in electronic devices, a new physical phenomenon – the supersaturation of solders under high electric currents – has been observed. Recent theories of EM are based on the unbalanced electrostatic and electron-wind forces exerted on metal ions. However, none of these models have coupled the EM effect and lattice stability. Here, we elucidate the fundamental driving force of EM and validated with in situ current-stressing experiments using synchrotron X-ray diffractometry and scanning electron microscopy and ab initio calculations based on density functional theory. A new insight of alloy phase stability under electric currents is uncovered.
||Planned: Supplemental Proceedings volume