Thermal conductivity of self-ion irradiated nanocrystalline zirconium thin films

摘要: Abstract Thermomechanical stability and high thermal conductivity are important for nuclear cladding material performance reliability, which degrade over time under irradiation. The literature suggests nanocrystalline materials as radiation tolerant, but little or no evidence is present from transport perspective. In this study, we irradiated 10 nm grain size zirconium thin films with 800 keV Zr + beam a 6 MV HVE Tandem accelerator to achieve various doses of 3 × 10 10 3.26 × 10 14  ions/cm 2 , corresponding displacement per atom (dpa) 2.1 × 10 − 4 2.28. Transmission electron microscopy showed significant growth, texture evolution oxidation in addition the creation defects due specimens were co-fabricated micro-heaters establish gradients that mapped using infrared thermometry. An energy balance approach was used estimate specimens, function irradiation dosage. Up 32% reduction measured sample exposed dose 2.1 dpa (3 × 10 ).