Point Defects in Niobium, Molybdenum and Tantalum

Journal Article · Sat Jul 14 04:00:00 EDT 1962 · Nature (London)

DOI:https://doi.org/10.1038/195169a0· OSTI ID:4829307

PEACOCK, D. E.; JOHNSON, A. A.

A preliminary account is given of the measurement of changes in electrical resistivity in neutron irradiated Nb and Mo and plastically deformed Nb and Ta. Recrystallized Nb and Mo wires were irradiated for periods of 3, 6, 9, and 12 months at 40 deg C. Isochronal and isothermal recovery curves obtained revealed one recovery peak for each metal. That for Nb occurred at 120 deg C and had an associated activation energy of 1.22 plus or minus 0.02 ev, while that for Mo was at 160 deg C with an associated activation energy of 1.25 plus or minus 0.08 ev. For both metals the magnitude of the recovery, DELTA p, passed through a maximum with increasing neutron dose. Recovery curves obtained for deformed Nb and Ta gave results similar to those found for the irradiated material. For Ta, a recovery peak was found at 120 deg C with an associated activation of 1.25 plus or minus 0.02 ev. (P.C.H.)

• Research Organization: Imperial Coll., London
• Sponsoring Organization: USDOE
• NSA Number: NSA-16-024258
• OSTI ID: 4829307
• Journal Information: Nature (London), Journal Name: Nature (London) Journal Issue: 4837 Vol. 195; ISSN 0028-0836
• Publisher: Nature Publishing Group
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ACTIVATION ENERGY
ANNEALING
DEFECTS
DEFORMATION
ELECTRIC CONDUCTIVITY
EXCITATION
IRRADIATION
LATTICES
MEASURED VALUES
METALS, CERAMICS, AND OTHER MATERIALS
MOLYBDENUM
NEUTRON BEAMS
NIOBIUM
RADIATION DOSES
RADIATION EFFECTS
RECOVERY
RECRYSTALLIZATION
TANTALUM
WIRES