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Helium Bubbles and Blistering in a Nanolayered Metal/Hydride Composite.

Authors
  • Taylor, Caitlin A1, 2
  • Lang, Eric3
  • Kotula, Paul G3
  • Goeke, Ronald2
  • Snow, Clark S2
  • Wang, Yongqiang1
  • Hattar, Khalid3
  • 1 Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
  • 2 Component Science, Engineering, and Production Center, Sandia National Laboratories, Albuquerque, NM 87185, USA.
  • 3 Material, Physical, and Chemical Sciences Center, Sandia National Laboratories, Albuquerque, NM 87185, USA.
Type
Published Article
Journal
Materials
Publisher
MDPI AG
Publication Date
Sep 18, 2021
Volume
14
Issue
18
Identifiers
DOI: 10.3390/ma14185393
PMID: 34576617
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Helium is insoluble in most metals and precipitates out to form nanoscale bubbles when the concentration is greater than 1 at.%, which can alter the material properties. Introducing controlled defects such as multilayer interfaces may offer some level of helium bubble management. This study investigates the effects of multilayered composites on helium behavior in ion-implanted, multilayered ErD2/Mo thin film composites. Following in-situ and ex-situ helium implantation, scanning and transmission electron microscopy showed the development of spherical helium bubbles within the matrix, but primarily at the layer interfaces. Bubble linkage and surface blistering is observed after high fluence ex-situ helium implantation. These results show the ability of metallic multilayers to alter helium bubble distributions even in the presence of a hydride layer, increasing the lifetime of materials in helium environments.

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