Influence of metal nanocomposite morphology on Helium implantation response

Journal Article · 04 November 2019 · Scripta Materialia

DOI: https://doi.org/10.1016/j.scriptamat.2019.10.041 · OSTI ID:1711386

Derby, Benjamin K. ^[1]; Baldwin, Jon Kevin Scott  ^[2]; Wang, Yongqiang  ^[2]; Demkowicz, Michael J. ^[3]; Misra, Amit ^[1]; Li, Nan  ^[2]

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1. Univ. of Michigan, Ann Arbor, MI (United States)
2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
3. Texas A & M Univ., College Station, TX (United States)

This work reports on Helium (He) accumulation in novel metal nanocomposites fabricated by phase separation in three-dimensions. These nanocomposites are dense with semi-coherent interfaces that ultimately influence He implantation response. The effect of film morphology on three aspects of He response is investigated: size and distribution of He precipitates, He retention, and He-induced changes in mechanical properties. Here, transmission electron microscopy analysis showed that He bubbles agglomerated along the vertical phase boundaries in morphologies with lateral and random domains of Cu and Mo. Nuclear Reaction Analysis (NRA) and nanoindentation results show He retention and hardness is morphology dependent.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: National Science Foundation (NSF); USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC). Basic Energy Sciences (BES) (SC-22)
• Grant/Contract Number: 89233218CNA000001; AC52-06NA25396; NA0003525
• OSTI ID: 1711386
• Report Number(s): LA-UR-20-20367
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Vol. 177; ISSN 1359-6462
• Publisher: ElsevierCopyright Statement
• Country of Publication: United States
• Language: English