He ion irradiation damage in Al/Nb multilayers Academic Article uri icon

abstract

  • We investigate the evolution of microstructure and mechanical properties of sputter-deposited AlNb multilayers with miscible fcc/bcc type interface and individual layer thickness, h, of 1200nm, subjected to helium ion irradiations: 100keVHe+ ions and a fluence of 61016cm2. Helium bubbles, 12nm in diameter, are observed. When h is greater than 25nm, hardnesses of irradiated multilayers barely change, whereas radiation hardening is more significant at smaller h. Transmission electron microscopy and scanning transmission electron microscopy studies reveal the formation of a thin layer of Nb3Al intermetallic phase along the AlNb interface as a consequence of radiation induced intermixing. The dependence of radiation hardening on h is interpreted by using a composite model considering the formation of the hard Nb3Al intermetallic layer.

published proceedings

  • JOURNAL OF APPLIED PHYSICS

author list (cited authors)

  • Li, N., Martin, M. S., Anderoglu, O., Misra, A., Shao, L., Wang, H., & Zhang, X.

citation count

  • 72

complete list of authors

  • Li, Nan||Martin, MS||Anderoglu, O||Misra, A||Shao, L||Wang, H||Zhang, X

publication date

  • June 2009