Self-assembly of solid nanoclusters in molybdenum under gas ion implantation. (15th March 2021)

• Record Type: Journal Article
• Authors: Sun, Cheng; Jiang, Chao; Jossou, Ericmoore; Topsakal, Mehmet; Gill, Simerjeet K.; Ecker, Lynne E.; Gan, Jian
• Is Part Of: Scripta materialia. Number 194(2021)
• Publication Date: 2021-03-15
• Subjects: Self-assembly -- Solid nanocluster -- Gas ion implantation -- Molybdenum; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.113651
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The self-assembly of defects in materials could create unique physical and chemical properties. In nuclear fuels, the formation of self-assembled fission products mitigates fission-gas-release and swelling. Here we report the formation of a solid nanocluster superlattice in molybdenum, an important constituent in metallic fuels, under krypton gas ion implantation. X-ray absorption near edge structure measurements coupled with density functional theory calculations show that the pressure of krypton nanoclusters in molybdenum is ~2 GPa and molecular dynamic simulations reveal that the krypton atoms are solid in the nanoclusters with a krypton-to-vacancy ratio of ~0.28 at 300 K. Graphical abstract: Image, graphical abstract