Thermostability and decomposition of the (Bi,Pb)2Sr2Ca2Cu3O10 phase in silver-clad tapes
Creators
- 1. Argonne National Laboratory, Argonne, Illinois 60439 (United States)
- 2. American Superconductor Corporation, Watertown, Massachusettes 02172 (United States)
Description
The stability of the Bi2-xPbxSr2Ca2Cu3O10 (Pb-2223) phase contained in silver-sheathed oxide-powder-in-tube specimens has been investigated by x-ray diffraction, transmission electron microscopy, and energy dispersive x-ray analysis. Silver tubes loaded with Pb-2223 precursor powders were processed into tapes using established metallurgical techniques. The tapes were heat-treated in a specially designed equilibration apparatus at selected temperatures (800--845 degree C) for a range of times (10--5500 min) and quenched in liquid gallium held at ∼40 degree C. The results showed that the Pb-2223 phase is stable in a limited temperature interval between 810 and 830 degree C in 7.5% oxygen. At 800 degree C, this phase decomposes to Bi2Sr2CaCu2O8 (2212), Ca2PbO4, and CuO; while at temperatures ≥840 degree C it partially melts with precipitation of Bi2Sr2CuO6 (2201) and Ca2CuO3. The effects of the silver cladding on the Pb-2223 phase stability and microstructure are also discussed
Additional details
Publishing Information
- Journal Title
- Journal of Applied Physics
- Journal Volume
- 72
- Journal Issue
- 6
- Journal Page Range
- p. 2385-2389.
- ISSN
- 0021-8979
- CODEN
- JAPIAU
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 24014246
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- BISMUTH OXIDES; CALCIUM OXIDES; CLADDING; COPPER OXIDES; DECOMPOSITION; HEAT TREATMENTS; HIGH-TC SUPERCONDUCTORS; LEAD OXIDES; PHASE STABILITY; PHASE STUDIES; PRECIPITATION; SILVER; STABILITY; STRONTIUM OXIDES; SUPERCONDUCTING CABLES
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BISMUTH COMPOUNDS; CABLES; CALCIUM COMPOUNDS; CHALCOGENIDES; CHEMICAL REACTIONS; CONDUCTOR DEVICES; COPPER COMPOUNDS; DEPOSITION; ELECTRIC CABLES; ELECTRICAL EQUIPMENT; ELEMENTS; EQUIPMENT; LEAD COMPOUNDS; METALS; OXIDES; OXYGEN COMPOUNDS; SEPARATION PROCESSES; STRONTIUM COMPOUNDS; SUPERCONDUCTORS; SURFACE COATING; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS