On the increase in the recrystallization temperature of nanostructured vacuum copper based condensates

Abstract

The structure of Cu-Ta and Cu-Mo condensates obtained by electron-beam evaporation from various sources in a vacuum is studied. It is shown that alloying copper condensates with tantalum and molybdenum disperses the grain structure of the copper matrix from micro- to nanoscale dimension as a result of the formation of grain boundary segregations by these elements that are formed on the surface of growing grains of copper matrix. Initial grain structure of alloyed condensates is retained to a temperature of ∼ 900°C.