Deoxidation of vanadium by calcium, barium and magnesium

Peterson, D.T.; Clark, R. G.; Stensland, W. A.

doi:10.1016/0022-5088(73)90021-0

Cited by 19 publications

(1 citation statement)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…superconducting vessel 'cavity', which is contaminated by oxygen and nitrogen during the cold deformations and welding, could be purified even after its construction [1,2]. Peterson et al reported in the deoxidation from vanadium that the key of this technique was the selection of reactive getter metals and the fast diffusion of gaseous elements in the matrix [13,14]. The oxygen diffusion in Nb was thought to be high enough to remove oxygen to the surface [1].…”

Section: Introductionmentioning

confidence: 99%

Removal of oxygen and nitrogen from niobium by external gettering

Kim

Suzuki

Numakura

et al. 1997

Journal of Alloys and Compounds

View full text Add to dashboard Cite

External gettering has a potential to remove interstitial gaseous impurities from solid niobium even below 1500K. The oxygen concentration in the deposit and the Nb bulk is evaluated by a combination of material thermodynamics and mass balance. The removal of oxygen and nitrogen was experimentally studied by using Ti, Y, Zr, Al and Si. Titanium deposited smoothly on the Nb surface in vacuum, and absorbed the gaseous impurities most efficiently. By applying Ti as an external getter on commercial niobium at 1463K, the residual resistivity ratio (RRR) reached 780.The oxygen distribution was calculated by combining thermodynamics and diffusion data. The experimental deoxidation rate was found to be slower than the calculated value. This may be attributed to the slow growth of the deposited layer, its morphology, and the interdiffused Ti-Nb alloy layer.

show abstract