Investigating Effects of Alloy Chemical Complexity on Helium Bubble Formation by Accurate Segregation Measurements Using Atom Probe Tomography
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Abstract
Due to its low solubility, He tends to cluster with vacancies to form bubbles in irradiated materials Previous studies showed that tuning the alloy chemical complexity in concentrated solidsolution alloys (CSAs) can be an effective approach to tailor defect energy landscapes and suppress He bubble growth In CSAs, multiple elements are randomly arranged in simple lattice structures, which generate extreme chemical complexity at the unit-cell level. A comprehensive understanding of how such chemical complexity affects defect generation and migration during irradiation is required. Here, atom probe tomography (APT) is used to accurately measure radiation-induced segregation near He bubbles, providing insight of defect energetics in CSAs.
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Research context
OpenAlex topics: Fusion materials and technologies · Nuclear Materials and Properties · Advanced Materials Characterization Techniques
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References (5)
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1. This work was supported as part of the Energy Dissipation to Defect Evolution (EDDE), an Energy Frontier Research Center funded by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences under contract number DE-AC05-00OR22725. Microscopy was performed as part of a user project at ORNL's Center for Nanophase Materials Sciences, which is a U.S. DOE, Office of Science User Facility. Helium implantations were supported by the Center for Integrated Nanotechnologies, which is a U.S. DOE Office of Science user facility jointly operated by Los Alamos and Sandia National Laboratories.
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