Impact of krypton irradiation on a single crystal tungsten: Multi-modal X-ray imaging study

Gill, Simerjeet K.; Topsakal, Mehmet; Jossou, Ericmoore; Huang, Xiaojing; Hattar, Khalid; Mausz, Julia; Elbakhshwan, Mohamed; Yan, Hanfei; Chu, Yong S.; Sun, Cheng; He, Lingfeng; Gan, Jian and Ecker, Lynne (2020): Impact of krypton irradiation on a single crystal tungsten: Multi-modal X-ray imaging study. In: Scripta Materialia, Vol. 188: pp. 296-301

Abstract

Understanding microstructural and strain evolutions induced by noble gas production in the nuclear fuel matrix or plasma-facing materials is crucial for designing next generation nuclear reactors, as they are responsible for volumetric swelling and catastrophic failure. We describe a multimodal approach combining synchrotron-based nanoscale X-ray imaging techniques with atomic-scale electron microscopy techniques for mapping chemical composition, morphology and lattice distortion in a single crystal W induced by Kr irradiation. We report that Kr-irradiated single crystal W undergoes surface deformation, forming Kr containing cavities. Furthermore, positive strain fields are observed in Kr-irradiated regions, which lead to compression of underlying W matrix. Published by Elsevier Ltd on behalf of Acta Materialia Inc.

• Item Type: Journal article
• Faculties: Geosciences > Department of Earth and Environmental Sciences
• Subjects: 500 Science > 550 Earth sciences and geology
• ISSN: 1359-6462
• Language: English