Improved high field performance of Nb-Al powder metallurgy processed superconducting wires
- 15 January 1984
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 44 (2) , 260-262
- https://doi.org/10.1063/1.94691
Abstract
Improved overall critical current densities Jc’s were achieved with powder metallurgy processed Nb-A1 which combined reduced powder sizes and increased nominal areal reductions R. Increased Jc values were obtained for a variety of different heat treatments. For a Nb-8 wt. % A1 wire with R=3.4×105 a very short treatment at 1100 °C followed by a 750 °C treatment gave (at 4.2 K)Jc>104 A/cm2 at 19 T; a 900 °C treatment followed by a 750 °C treatment gave Jc=104 A/cm2 at 18 T and, at 2 K, Jc was greater than 104 A/cm2 at 20 T; and a treatment of 800 °C for 8 h gave (at 4.2 K)Jc=104 A/cm2 at 17.5 T.Keywords
This publication has 8 references indexed in Scilit:
- Scaleup of powder metallurgy processed Nb-Al multifilamentary wireIEEE Transactions on Magnetics, 1983
- Fabrication of multifilamentary Nb-Al by a powder metallurgy processIEEE Transactions on Magnetics, 1981
- Effect of the thickness of aluminum layer on the transport properties of Nb3Al superconducting wiresIEEE Transactions on Magnetics, 1981
- Nb-Al multifilamentary superconducting composites produced by powder processingApplied Physics Letters, 1980
- A New metallurgical investigation of the niobium-aluminium systemJournal of the Less Common Metals, 1980
- Critical currents in liquid-quenched Nb3AlJournal of Applied Physics, 1977
- Nb3Al formation at temperatures lower than 1000°CIEEE Transactions on Magnetics, 1975
- Upper critical fields of high-temperature superconducting Nb1−y(Al1−xGex)y and Nb3Al: Measurements of Hc2 > 400 kG at 4.2°KPhysics Letters A, 1970