Emissionsmikroskopische Untersuchungen zur plastischen Verformung und Versetzungsmarkierung an NbFe2

By means of a homogenous compression device the Laves phase NbFe₂ was deformed plastically while being observed in an emission electron microscope. In connection with these experiments the possibility of marking dislocations was investigated emerging from the crystal by means of a thermal treatment under vacuum conditions in the emission electron microscope. Slip traces on the surfaces were observed only above a critical temperature (transition brittle-ductile). During a high temperature treatment under vacuum oxide nuclei grow on the surface. These nuclei seem to decorate dislocations emerging from the crystal. On surfaces of plastic deformed samples the oxide nuclei mark slip traces.