Effects of material processing in high temperature superconducting magnetic bearings
- 4 November 1991
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 59 (19) , 2442-2444
- https://doi.org/10.1063/1.105989
Abstract
A study of the levitation forces related to superconducting bearing design was conducted on free‐sintered and melt‐textured Y1Ba2Cu3O7−δ(YBCO) materials. Comparisons were made between free sintered, variously oriented, and randomly oriented melt‐textured materials. Magnetic force measurements were also conducted on oriented YBCO before and after neutron irradiation. A magnetic bearing of new design utilizing the phenomenon of flux pinning was then fabricated using melt‐textured YBCO with permanent magnets and a speed of 135 000 rpm was achieved. Rotational dissipation and magnetic stiffness measurements were performed on the bearing prototype.Keywords
This publication has 8 references indexed in Scilit:
- Spontaneous and persistent rotation of cylindrical magnets levitated by Y-Ba-Cu-O superconductorsJournal of Applied Physics, 1991
- Large Levitation Force due to Flux Pinning in YBaCuO Superconductors Fabricated by Melt-Powder-Melt-Growth ProcessJapanese Journal of Applied Physics, 1990
- Magnetic bearings using high-temperature superconductors: some practical considerationsSuperconductor Science and Technology, 1990
- Manufacture of bulk superconducting YBa2Cu3O7-δ by a continuous processNature, 1990
- High-speed rotation of magnets on high T c superconducting bearingsApplied Physics Letters, 1990
- Friction in levitated superconductorsApplied Physics Letters, 1988
- Levitation effects involving high T c thallium based superconductorsApplied Physics Letters, 1988
- Hysteretic levitation forces in superconducting ceramicsApplied Physics Letters, 1988