Superconductivity of heat-treated Nb--65 at. % Ti alloy

Journal Article · Mon Oct 01 04:00:00 EDT 1973 · J. Mater. Sci., v. 8, no. 10, pp. 1383-1400

DOI:https://doi.org/10.1007/BF00551661· OSTI ID:4406380

Witcomb, M J; Dew-Hughes, D

Brief reviews are given of the effect of heat treatment on the microstructure of cold-worked bcc metals and the superconducting properties of niobium alloys. Particular attention is paid to the influence of interstitial impurities in these processes. The annealing effects in microstructure and superconducting properties of a cold-worked Nb--65 at.% Ti alloy, containing oxygen as a major impurity, have been studied. The precipitation process takes the form BETA TiNb + O/sub 2/ yields various Ti oxides yields alpha Ti + TiO. Differences in precipitation sequence are described for vacuum-annealing and annealing in impure argon. Flux-pinning is related to the microstructural observations. At least three pinning mechanisms appear to operate: dislocation pinnlng and two types of precipitate pinning. These observations are in accord with previously proposed pinning models. (auth)

• Research Organization: Univ. of Lancaster, Eng.
• NSA Number: NSA-29-008882
• OSTI ID: 4406380
• Journal Information: J. Mater. Sci., v. 8, no. 10, pp. 1383-1400, Journal Name: J. Mater. Sci., v. 8, no. 10, pp. 1383-1400; ISSN JMTSA
• Country of Publication: United Kingdom
• Language: English

Related Subjects

*NIOBIUM ALLOYS-- SUPERCONDUCTIVITY
*TITANIUM ALLOYS-- SUPERCONDUCTIVITY
ANNEALING
BCC LATTICES
CHEMICAL REACTIONS
COLD WORKING
DISLOCATIONS
HEAT TREATMENTS
IMPURITIES
INTERSTITIALS
MAGNETIC FLUX
METALS
MICROSTRUCTURE
N66200* --Physics (Low Temperature)--Superconductivity
OXYGEN
PRECIPITATION
SUPERCONDUCTORS