An attempt to correlate ion irradiation behaviour and chemical durability of titanate- and zirconate-based ceramics
MetadataShow full item record
Titanate and zirconate samples from perovskite and pyrochlore families have been submitted to low energy heavy ion irradiation in order to pre-damage their crystalline structure. Samples irradiated below or near their amorphisation threshold were then leached in deionised water at 90 degrees C in static mode while samples irradiated above their amorphisation threshold were leached at 100 degrees C in dynamic mode. Below the amorphisation threshold, only slight effects of the pre-irradiation have been found on the chemical durability of titanate and zirconate from the perovskite family. Above the amorphisation threshold, perovskite surfaces exhibit a stronger hydration and an increase of the growth kinetics of secondary phases identified as TiOOH and ZrOOH compounds mainly. The pre-irradiated pyrochlore (Nd(2)Zr(2)O(7)) exhibits both a higher hydration degree and a higher Nd-Zr surface co-enrichment due to the destabilization of their network by the pre-irradiation. (C) 2008 Elsevier B....V. All rights reserved.
Keywords:aqueous alteration / ion irradiation / nuclear ceramics / titanate / zirconate
Source:Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 2008, 266, 12-13, 3186-3189
- 14th International Conference on Radiation Effects in Insulators (REI-14), Aug 28-Sep 01, 2007, Univ Caen, Caen, France