[3D03-08] 照射効果

[3D03] Diffusivity of Nickel in Fe under 3MeV Fe Irradiation at 673K Studied by Atom Probe Tomography

*Xinrun Chen¹, Phongsakorn Park Tom¹, Ba Vu Chinh Nguyen¹, Kenta Murakami^1,2 (1. Nagaoka Univ. of Tech., 2. UTokyo)

キーワード：Diffusivity, RPV, Irradiation, APT

For the development of Mn-Ni-Si clustering model in reactor pressure vessels (RPVs), nickel films on iron based alloy were irradiated by 2.8 MeV Fe ions at various temperatures and the depth distribution of Ni atoms was measured using atom probe tomography (APT). The diffusion coefficient of Ni into Fe at 673K under 10^-4 dpa/s of Fe irradiation was estimated to be 8.1×10^-15 cm²/s, which is larger than the estimation from thermal diffusion.