Rainer Schmid-Fetzer is Professor Emeritus at Clausthal University of Technology (TU Clausthal), Germany. He received his PhD from TU Clausthal in 1977. With background in metallurgy and physics he earned merits in thermodynamics, solidification, interface reactions and applications to designing alloys. His career comprised research at University of Wisconsin at Madison between 1982 and 1984, as lecturer, and professor at TU Clausthal, and also in 1994 at Microelectronics and Microsystems section of Daimler Benz Corporate Research Institute, Frankfurt, and in 1997 as Visiting Professor at University of Wisconsin at Madison. He retired in 2015. He is Fellow of ASM International and awardee of both the Hume-Rothery Prize, IOM3, UK, and William Hume-Rothery Award, TMS, USA. He is an associate editor of J. Phase Equilibria and Diffusion, and serves on the Advisory Board of International Journal of Materials Research.