Characterization of Densified Fully-Stabilized Nanometric Zirconia by Positron Annihilation Spectroscopy
Journal Article
·
· Journal of Applied Physics
OSTI ID:877771
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 charges 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.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 877771
- Report Number(s):
- UCRL-JRNL-211138; JAPIAU; TRN: US200608%%675
- Journal Information:
- Journal of Applied Physics, Vol. 99; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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