6533b7dafe1ef96bd126d887

RESEARCH PRODUCT

Characterisation and radiolysis of modified lithium orthosilicate pebbles with noble metal impurities

Larisa BaumaneE. PajusteA. SupeArtūrs ZariņšArtūrs ZariņšO. ValtenbergsGunta ĶIzāneM.h.h. KolbOliver LeysMindaugas AndrulevičiusSigitas TamulevičiusR. Knitter

subject

Materials scienceInorganic chemistryAlloychemistry.chemical_element02 engineering and technologyengineering.material01 natural sciences010305 fluids & plasmasRhodiumchemistry.chemical_compoundImpurity0103 physical sciencesRadiolysisTritium breeding ceramicGeneral Materials ScienceCivil and Structural EngineeringMechanical EngineeringNoble metalsLithium orthosilicate021001 nanoscience & nanotechnologyNuclear Energy and EngineeringchemistryRadiolysisengineeringNoble metalLithiumOrthosilicate0210 nano-technologyPlatinum

description

Modified lithium orthosilicate (Li4SiO4) pebbles with additions of titanium dioxide (TiO2) are suggested as an alternative tritium breeding ceramic for the European solid breeder test blanket module. The noble metals – platinum (Pt), gold (Au) and rhodium (Rh), can be introduced into the modified Li4SiO4 pebbles during the melt-based process, due to the corrosion of Pt-Rh and Pt-Au alloy crucible components. In this study, the surface microstructure, chemical and phase composition of the modified Li4SiO4 pebbles with different contents of the noble metals was analysed. The influence of the noble metals on the radiolysis was evaluated after irradiation with accelerated electrons (E = 5 MeV), up to 12 MGy absorbed dose at 300–345 K in a dry argon atmosphere. Using electron spin resonance (ESR) spectroscopy, it was determined that the noble metals (up to 300 ppm) do not significantly influence the formation and accumulation of radiation-induced defects (RD) in the modified Li4SiO4 pebbles.

yearjournalcountryeditionlanguage
2017-11-01
10.1016/j.fusengdes.2017.01.008http://www.scopus.com/inward/record.url?scp=85009785274&partnerID=8YFLogxK