SKM 2023 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 18: Transport in Materials: Metals, Alloys and Oxides

MM 18.3: Vortrag

Dienstag, 28. März 2023, 12:00–12:15, SCH A 118

Control of microstructure in binary alloy thin films by means of electromigration — •Thomas Brede, Reiner Kirchheim, and Cynthia A. Volkert — Universtität Göttingen, Insitut für Materialphysik, Göttingen, Deutschland

Magnetic and electric fields and currents open new and efficient materials processing paths for microstructure optimization than were previously available. For example, it has recently been shown that high DC electric currents can be used to create anisotropic microstructures with elongated ferrite grains in iron-carbon thin films [1]. The elongated grains form in the wake of carbides that migrate due to electromigration induced carbon flux divergences. The underlying mechanisms controlling the microstructural evolution will be presented and will be used to discuss other materials systems that might show this effect and how they could be implemented to achieve precise microstructure control.

[1] Brede, T., Kirchheim, R., & Volkert, C. A. (2020). Anisotropic grain growth in iron-carbon films at high electric current densities. Scripta Materialia, 178, 18-23.