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Long-term behavior of the tritides formed by nickel-based intermetallic compounds

Conference · · Fusion Technol.; (United States)
OSTI ID:5761174
Some properties of the tritide phases formed by the intermetallic compounds Mg/sub 2/Ni, ZrNi, and LaNi/sub 5/ have been studied. Whereas ZrNiT/sub 3/ will retain its stoichiometry indefinitely when sufficient gaseous tritium is available, the stoichiometries of Mg/sub 2/NiT/sub 4/ and LaNi/sub 5/T /sub 6.9/ decrease with time. Although all three intermetallic tritides can retain large quantities of the helium-3 tritium decay daughter product in the solid phase, irreversible release of helium begins after several hundred days for ZrNiT /sub x/ and Mg/sub 2/NiT /sub x/. However, LaNi/sub 5/T /sub x/ retains all of the helium generated in the solid for at least 2400 days. NMR measurements for ZrNiT /sub x/ and Mg/sub 2/NiT /sub x/ imply that helium is retained in microscopic bubbles as previously observed in several binary metal tritides.
Research Organization:
Monsanto Research Corporation, Mound Miamisburg, OH
OSTI ID:
5761174
Report Number(s):
CONF-850405-
Conference Information:
Journal Name: Fusion Technol.; (United States) Journal Volume: 8:2
Country of Publication:
United States
Language:
English