20.500.12556/DiRROS-24676 Microstructural analysis of tungsten single crystals irradiated by MeV W ions the effect of irradiation dose and temperature Microstructural analysis of tungsten single crystals irradiated by MeV W ions: the effect of irradiation dose and temperature We investigated the microstructural evolution of W(111) single crystals under high-energy self-ion irradiation at 290 K and 800 K, using complementary characterization techniques, including Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), Rutherford backscattering spectrometry in channelling regime (RBS-C), Positron annihilation spectroscopy (PAS), and Nuclear reaction analysis (NRA). Irradiation with MeV W ions allowed for controlled defect formation, with dose and temperature significantly affecting defect type and distribution. At 290 K, interstitial defects evolved from dislocation loops at low doses (0.02 dpa) to dislocation networks at higher doses (0.2 dpa). In contrast, at 800 K, lower dislocation densities were observed, with nm-sized dots and isolated lines forming at 0.02 dpa and developing into longer dislocation lines (~30 nm) at 0.2 dpa. RBS-C spectra support these findings, showing a trend of increasing dislocation density with dose but decreasing with temperature. PAS analyses revealed mono-vacancies and small vacancy clusters (V2–V4) at 290 K, coalescing into larger clusters (V25–V50) at 800 K. NRA measurements indicated greater deuterium retention at 290 K than at 800 K, consistent with lower vacancy mobility at the lower temperature. Combined TEM, RBS-C, PAS, and NRA observations highlight increased vacancy mobility and defect recombination with temperature, forming larger vacancy clusters at 800 K. This comprehensive study provides quantitative insights into defect formation and evolution in W single crystals, presenting a comparative analysis of defect distributions across multiple techniques and revealing temperature-dependent mechanisms of microstructural change. heavy-ion irradiation structural defects obsevanje s težkimi ioni strukturne poškodbe true false true Elsevier Nizozemska Angleški jezik Slovenski jezik © 2025 The Authors. Neznano 2025-12-11 15:13:40 2025-12-11 15:13:40 2025-12-12 03:44:13 0000-00-00 00:00:00 2025 0 0 Nasl. z nasl. zaslona; Soavtorji iz Slovenije: Andreja Šestan, Esther Punzón-Quijorna, Mitja Kelemen, J. Predrag, Sabina Markelj; Opis vira z dne 22. 4. 2025; str. 1-17 Vol. 224, [article no.] 115050 Jun. 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2024-11-24 2025-04-14 2025-04-15 620.1/.2 1873-4189 10.1016/j.matchar.2025.115050 233468419 https://www.sciencedirect.com/science/article/pii/S1044580325003390?via%3Dihub 1 a220c7ce-d69b-11f0-94a7-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=36842 RAZ_Zavasnik_Janez_2025.pdf RAZ_Zavasnik_Janez_2025.pdf 1 CCD403AD9344CDBD74472160573E14C9 0b32da32628eeb7d25bd94baf137b6a06a8a91aab4f458acc4d0d2c3b6b0bdc2 2eb71be0-d69c-11f0-94a7-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=36843 Institut Jožef Stefan 0 0 0