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Response of isotopically tailored titanium diboride to neutron irradiation
Author(s) -
Koyanagi Takaaki,
Katoh Yutai,
Ang Caen,
King Derek,
Hilmas Greg E.,
Fahrenholtz William G.
Publication year - 2019
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.16036
Subject(s) - irradiation , materials science , boron , radiochemistry , titanium , neutron irradiation , swelling , neutron , crystallite , fluence , composite material , metallurgy , chemistry , nuclear physics , physics , organic chemistry
The response of polycrystalline TiB 2 to neutron irradiation was investigated. The material was fabricated using isotopically enriched 11 B powders to minimize helium production via the 10 B(n, α) 7 Li reaction. Neutron irradiation was conducted at temperatures of ~200°C and ~600°C to a fast fluence of 2.4 × 10 25 n/m 2 (>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 TiB 2 . This study demonstrated improved radiation resistance of isotopically tailored TiB 2 compared with natural boron TiB 2 , which exhibited macroscopic fracture by irradiation.