Key Mechanistic Features of Swelling and Blistering of Helium-Ion-Irradiated Tungsten
Copyright policy )Key Mechanistic Features of Swelling and Blistering of Helium-Ion-Irradiated Tungsten
Helium-ion-induced swelling and blistering of single-crystal tungsten is investigated using a Helium Ion Microscope for site-specific dose-controlled irradiation (at 25 keV) with analysis by Helium Ion Microscopy, Atomic Force Microscopy and Transmission Electron Microscopy (cross-sectioning by Focused Ion Beam milling). Our measurements show that the blister cavity forms at the depth of the helium peak and that nanobubbles coalesce to form nanocracks within the envelope of the ion stopping range, causing swelling of the blister shell. These results provide the first direct experimental evidence for the interbubble fracture mechanism proposed in the framework of the gas pressure model for blister formation.
- University of California, Berkeley United States
- University of California United States
- National Center for Electron Microscopy United States
- Lawrence Berkeley National Laboratory United States
- UC Berkeley United States
FOS: Physical sciences, Tungsten, Helium Ion Microscopy, surface blistering, helium ion irradiation, 5104 Condensed matter physics (for-2020), Materials, 4017 Mechanical engineering (for-2020), Condensed Matter - Materials Science, Mechanical Engineering, 51 Physical Sciences (for-2020), Materials Science (cond-mat.mtrl-sci), Materials Engineering, Helium ion irradiation, Condensed Matter Physics, cond-mat.mtrl-sci, Synchrotrons and Accelerators, 0913 Mechanical Engineering (for), 0912 Materials Engineering (for), 0204 Condensed Matter Physics (for), Materials (science-metrix), inert gas nanobubbles, Physical Sciences, 5110 Synchrotrons and Accelerators (for-2020), Surface blistering, Inert gas nanobubbles, 4016 Materials engineering (for-2020), Helium ion microscopy
FOS: Physical sciences, Tungsten, Helium Ion Microscopy, surface blistering, helium ion irradiation, 5104 Condensed matter physics (for-2020), Materials, 4017 Mechanical engineering (for-2020), Condensed Matter - Materials Science, Mechanical Engineering, 51 Physical Sciences (for-2020), Materials Science (cond-mat.mtrl-sci), Materials Engineering, Helium ion irradiation, Condensed Matter Physics, cond-mat.mtrl-sci, Synchrotrons and Accelerators, 0913 Mechanical Engineering (for), 0912 Materials Engineering (for), 0204 Condensed Matter Physics (for), Materials (science-metrix), inert gas nanobubbles, Physical Sciences, 5110 Synchrotrons and Accelerators (for-2020), Surface blistering, Inert gas nanobubbles, 4016 Materials engineering (for-2020), Helium ion microscopy
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