An attempt to correlate ion irradiation behaviour and chemical durability of titanate- and zirconate-based ceramics

作者：Larguem H; Trocellier P^*; Draganic I; Poissonnet S

来源：Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms , 2008, 266(12-13): 3186-3189.

DOI：10.1016/j.nimb.2008.03.223

• aqueous alteration
• ion irradiation
• nuclear ceramics
• titanate
• zirconate

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.

• 出版日期2008-6
• 单位中国地震局