We have shown that upon high fluence helium ion irradiation, metallic glass Cu 50Zr 45Ti 5 becomes highly porous at the depth of the helium projected range. The resulting porous region is characterized by the formation of a tunnel like structure and self-linkage of nanometer size gas bubbles. Furthermore, the irradiation leads to the formation of nanometer size Cu xZr y crystals that are randomly distributed. The results of this study indicate that the He-filled bubbles have attractive interactions and experience considerable mobility. Movement of the bubbles is believed to be assisted by ballistic collisions.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)