Abstract
The response of polycrystalline TiB2 to neutron irradiation was investigated. The material was fabricated using isotopically enriched 11B powders to minimize helium production via the 10B(n, α)7Li reaction. Neutron irradiation was conducted at temperatures of ~200°C and ~600°C to a fast fluence of 2.4 × 1025n/m2 (>0.1 MeV). The material exhibited some swelling, but less swelling at the higher irradiation temperature. No macroscopic damage was observed in the irradiated material, although moderate irradiation-induced micro-cracking was found in the irradiated TiB2. This study demonstrated improved radiation resistance of isotopically tailored TiB2 compared with natural boron TiB2, which exhibited macroscopic fracture by irradiation.
| Original language | English |
|---|---|
| Pages (from-to) | 85-89 |
| Number of pages | 5 |
| Journal | Journal of the American Ceramic Society |
| Volume | 102 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 2019 |
Funding
The study was supported by the US DOE Office of Fusion Energy Sciences under contract DE-AC05-00OR22725, and by IMR Tohoku University under contract NFE-13-04416 with UT-Battelle, LLC. A portion of this research used resources at the HFIR, a DOE Office of Science User Facility operated by ORNL. This manuscript has been co-authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/download s/doe-public-access-plan).