Helium Bubbles and Blistering in a Nanolayered Metal/Hydride Composite

Materials

Ronald Goeke¹  Clark S. Snow¹  Eric Lang²  Khalid Hattar²  Paul G. Kotula²  Yongqiang Wang³  Caitlin A. Taylor³ 

[1] Component Science, Engineering, and Production Center, Sandia National Laboratories, Albuquerque, NM 87185, USA;Material, Physical, and Chemical Sciences Center, Sandia National Laboratories, Albuquerque, NM 87185, USA;Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;

关键词: tritium storage;    functional materials;    nanolayers;    multilayers;    helium implantation;    helium bubbles;   

DOI  :  10.3390/ma14185393

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown