Effects of material processing in high temperature superconducting magnetic bearings

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 a...

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Veröffentlicht in:	Applied physics letters 1991-11, Vol.59 (19), p.2442-2444
Hauptverfasser:	MCMICHAEL, C. K, MA, K. B, LIN, M. W, LAMB, M. A, MENG, R. L, XUE, Y. Y, HOR, P. H, CHU, W. K
Format:	Artikel
Sprache:	eng
Schlagworte:	360200 > Ceramics, Cermets, & Refractories ALKALINE EARTH METAL COMPOUNDS AMINES AMMONIUM COMPOUNDS Applied sciences BARIUM COMPOUNDS BARIUM OXIDES BEAMS BEARINGS CHALCOGENIDES CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY COPPER COMPOUNDS CUPRATES DISSIPATION FACTOR Electrical engineering. Electrical power engineering Electrical machines Exact sciences and technology FABRICATION HIGH-TC SUPERCONDUCTORS LEVITATION MAGNETIC BEARINGS MATERIALS SCIENCE NEUTRON BEAMS NUCLEON BEAMS ORGANIC COMPOUNDS OXIDES OXYGEN COMPOUNDS PARTICLE BEAMS PHYSICAL RADIATION EFFECTS QUATERNARY COMPOUNDS RADIATION EFFECTS SINTERING SUPERCONDUCTORS TRANSITION ELEMENT COMPOUNDS YTTRIUM COMPOUNDS 426001 > Engineering-- Superconducting Devices & Circuits-- (1990-) YTTRIUM OXIDES
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Beschreibung
Zusammenfassung:	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.
ISSN:	0003-6951 1077-3118
DOI:	10.1063/1.105989