Niobium self-diffusion

Journal Article · Sat Jan 14 23:00:00 EST 1978 · Phys. Rev., B; (United States)

DOI:https://doi.org/10.1103/PhysRevB.17.440· OSTI ID:5142971

Einziger, R E; Mundy, J N; Hoff, H A

The diffusion of /sup 95/Nb in niobium has been measured between 1353 and 2693 K. The data showed nonlinear Arrhenius behavior and fit the expression D = (8 x 10/sup -3/ exp (-3.62 eV/kT) + 3.7 exp (-4.54 eV/kT)) cm/sup 2/sec/sup -1/. The data are interpreted in terms of a single-vacancy-divacancy mechanism. The effect of oxygen on niobium self-diffusion was measured over the temperature range 1750-2690 K. There was no measurable difference in the diffusion coefficient obtained from samples with 500-wt-ppm O/sub 2/ and samples with less than 10-wt-ppm O/sub 2/.

• Research Organization: Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439
• OSTI ID: 5142971
• Journal Information: Phys. Rev., B; (United States), Journal Name: Phys. Rev., B; (United States) Vol. 17:2; ISSN PLRBA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
360104* -- Metals & Alloys-- Physical Properties
ARRHENIUS EQUATION
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CRYOGENIC FLUIDS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DAYS LIVING RADIOISOTOPES
DIFFUSION
ELEMENTS
FLUIDS
IMPURITIES
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPE APPLICATIONS
ISOTOPES
METALS
NIOBIUM
NIOBIUM 95
NIOBIUM ISOTOPES
NONMETALS
NUCLEI
ODD-EVEN NUCLEI
OXYGEN
POINT DEFECTS
RADIOISOTOPES
REFRACTORY METALS
SELF-DIFFUSION
TEMPERATURE DEPENDENCE
TRACER TECHNIQUES
TRANSITION ELEMENTS
VACANCIES
VERY HIGH TEMPERATURE