Skip to main content
Open Access Publications from the University of California

Characterization of densified fully stabilized nanometric zirconia by positron annihilation spectroscopy

  • Author(s): Garay, J E
  • Glade, S C
  • Asoka-Kumar, P
  • Anselmi-Tamburini, U
  • Munir, Zuhair A
  • et al.

Fully stabilized nanometric zirconia samples with varying degrees of porosity and grain sizes were analyzed using the coincidence Doppler broadening mode of the positron annihilation spectroscopy (PAS). A decrease in the low-momentum fraction was observed and coincided with a decrease in porosity. In addition to pores, it is proposed that defects in the negatively charged grain-boundary space region act as positron trapping centers; their effectiveness decreases with an increase in grain size. It is shown that PAS is sensitive to small grain-size differences within the nanometric regime in these oxide materials. (c) 2006 American Institute of Physics.

Many UC-authored scholarly publications are freely available on this site because of the UC Academic Senate's Open Access Policy. Let us know how this access is important for you.

Main Content
Current View