Glassy superconducting metal alloys in the beryllium-niobium-zir

Details Glassy superconducting metal alloys in the beryllium-niobium-zir Glassy superconducting metal alloys in the beryllium-niobium-zir

1977-08-05

1978-09-26

Dean, R.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75150, 75174, C22C 100, C22C 1400

Patent

active

041166876

ABSTRACT:
Ductile metal alloys of compositions in the Be-Nb-Zr system are provided. The compositions consist essentially of about 20 to 45 atom percent beryllium, about 2.5 to 20 atom percent niobium and the balance essentially zirconium and incidental impurities. The alloys of the invention, which are suitable for superconducting applications, evidence a combination of critical temperatures of at least about 2 K, critical currents of about 10.sup.3 A/cm.sup.2 and critical fields of about 20 to 60 kOe.

REFERENCES:
patent: 3856513 (1974-12-01), Chen et al.
patent: 3989517 (1976-11-01), Tanner et al.
patent: 4050931 (1977-09-01), Tanner et al.
M. M. Collver et al, "Superconductivity in Amorphous Transition Metal Alloys," Phys. Rev. Lett. 30 (1973) 92.
B. W. Roberts, "Survey of Superconductive Materials - - - ," J. Phys. Chem. Ref. Data vol. 5 (1976) pp. 614-618.

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