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Description
Particle accelerators impose extreme thermomechanical and radiation loads on the structural and shielding materials. Long-term reliability in compact, high-intensity facilities requires the development of advanced radiation-tolerant ceramic composites. This effort concerns the radiation resilience of TiO2-ZrO2 hybrid nano-oxide composites as candidate shielding materials. The combination of defect-sensitive TiO2 with high phase stability and shock resistance of ZrO₂ is expected to provide synergy enhancement against irradiation damage. In this paper the equimolar ZrTiO4 for its unique structural and electronic properties, and (1:9) composition, which stabilizes the toughened tetragonal ZrO2 phase via stress-induced transformation was investigated. Graded doses of irradiation were performed using high-dose X-ray irradiation and an electron beam with the energy up to 5 MeV. All samples before and after irradiation were characterized with SEM and EDS, PL. Quantitative analysis of the degradation mechanisms, such as surface disordering, morphological changes, at all dose levels provides an overall assessment of the composites' radiation resilience profile.
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