Computational evaluation of optimal reservoir and sink lengths for threshold current density of electromigration damage considering void and hillock formation

Takaya, Ryuji; Sasagawa, Kazuhiko; Moriwaki, Takeshi; Fujisaki, Kazuhiro

doi:10.1016/j.microrel.2021.114060

Cited by 3 publications

(1 citation statement)

References 14 publications

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“…It is worth mentioning that in many previous publications, it has been stated that the electromigration phenomenon might intensify mass transfer caused by the direct application of an electric current to a sample. Current densities higher than 10 7 A/m 2 and high average atomic mobilities are desirable for accelerating mass transfer through electromigration [ 58 ]. In our previous work [ 29 ], we considered the electromigration rate to investigate the potential contribution of electromigration to mass transfer for a Ni–Al system under SPS conditions.…”

Section: Discussionmentioning

confidence: 99%

Electrical and Heat Distributions and Their Influence on the Mass Transfer during the Flash Spark Plasma Sintering of a Cu/Cr Nanocomposite: Experiments and Numerical Simulation

et al. 2022

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The nanocomposite Cu–Cr powder was consolidated by flash spark plasma sintering (FSPS), which involves applying an extremely rapid change in the electrical power passing through the bulk of the sample. It was demonstrated that an essentially fully dense material could be obtained in 15 s. Such short-term treatment typically preserves the nanostructured features of the material. However, investigation revealed a nonuniformity in the microstructure of the alloys obtained under such extreme conditions. To better understand the observed effects, the FSPS process was simulated. It was observed that a rapid change in the applied electrical power resulted in nonuniform distributions of current density and temperature along the body of the consolidated material. Specifically, the current density was higher on the periphery of the sample, and the temperature was higher in the middle. These findings explain the observed structural transformation during FSPS and suggest an optimization strategy to avoid microstructural nonuniformity.

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Section: Discussionmentioning

confidence: 99%