PNNL

Abstract

Analytical electron microscopy was used for the study of electron irradiation induced phase separations in three sodium borosilicate glasses. Results directly indicate that after the glasses have been irradiated to different electron doses two different types of phase separations occurred in all the three glasses. In the early stage of irradiation Na migrates to the periphery substrate. Further irradiation induced B-rich phases in the glass without containing Fe, and B-Fe phases in the two Fe-containing glasses separation from Si-rich phases. It demonstrates that AEM is powerful in study of structure change in a glass.