DIFFUSION STUDIES IN ORDERED ALLOYS Revive old methods with new ideas and new possibilities

摘要

Diffusion is an important and fundamental phenomenon for the properties and the behavior of metals, alloys, semiconductors, ceramics, glasses and polymers at higher temperatures. It plays an important role in the kinetics of microstructural changes of a material. It is a driving force for nucleation of new phases, recrystallization and phase transformations with a wide use in current technology, e.g. surface hardening, changing of deformation behavior by nucleation, diffusion doping or sintering. Especially the intermetallic alloys attracted attention as suitable materials for high-temperature applications due to their corrosion stability and strength. Many of the physical processes, developed for intermetallics are applicable for diffusion in all crystalline solids. The knowledge of the diffusion behavior of intermetallic alloys is, therefore, of interest for basic material science and for their use in technological applications.