Untersuchungen zum Segregationsverhalten und zur Linienspannung von Korngrenzentripellinien in Kupferlegierungs-Trikristallen

• Antragsteller: Professor Dr. Günter Gottstein; Professor Dr. Guido Schmitz
• Fachliche Zuordnung: Thermodynamik und Kinetik sowie Eigenschaften der Phasen und Gefüge von Werkstoffen
• Förderung: Förderung von 2012 bis 2014
• Projektkennung: Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 211077408

It is proposed to combine tomographic atom probe characterization and atomic force microscopy to measure the segregation of alloying elements in copper to grain boundary triple junction lines and its effect on triple junction energy. This will be achieved by a measurement of the force equilibrium at a triple junction as established by the curvature of the adjourning grain boundary grooves at the root of the triple junction. A corresponding theoretical basis has been developed and first measurements on specimens of pure copper with random triple junction crystallography have been conducted. This methodology will be utilized in conjunction with tomographic atom probe analysis on tricrystals with defined triple line crystallography. It is expected that the obtained information can serve as a tool for grain boundary engineering at the nanoscale.

• DFG-Verfahren: Sachbeihilfen