A study of parameters that influence growth and stability of the (Bi sub 1 minus x Pb sub x ) sub 2 Sr sub 2 Ca sub 2 Cu sub 3 O sub y phase

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The growth and stability of the (Bi{sub 1-x}Pb{sub x}){sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub y} (Bi-2223) phase contained in silver-sheathed wires has been investigated by a combination of x-ray diffraction, scanning electron microscopy, energy dispersive x-ray analysis, and transmission electron microscopy. Silver tubes loaded with Bi-2223 precursor powders were processed into filaments using established metallurgical techniques. The filaments were then heat-treated at selected temperatures (800 to 845{degrees}C) for a range of times (10 to 6000 min) in a 7.5% oxygen atmosphere. From these studies it has been possible to investigate the time-temperature-oxygen pressure domains wherein Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8} (Bi-2212) ... continued below

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Luo, J.S.; Merchant, N.; Maroni, V.A.; Gruen, D.M.; Tani, B.S. (Argonne National Lab., IL (United States)); Carter, W.L. et al. April 1, 1992.

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The growth and stability of the (Bi{sub 1-x}Pb{sub x}){sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub y} (Bi-2223) phase contained in silver-sheathed wires has been investigated by a combination of x-ray diffraction, scanning electron microscopy, energy dispersive x-ray analysis, and transmission electron microscopy. Silver tubes loaded with Bi-2223 precursor powders were processed into filaments using established metallurgical techniques. The filaments were then heat-treated at selected temperatures (800 to 845{degrees}C) for a range of times (10 to 6000 min) in a 7.5% oxygen atmosphere. From these studies it has been possible to investigate the time-temperature-oxygen pressure domains wherein Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8} (Bi-2212) + second phases transform to Bi-2223. Fractional conversion (Bi-2212) {yields} (Bi-2223) versus time data show good conformance to the kinetic model for a diffusion-controlled reaction at the interface between thin sheets and a fine powder or a fluid. Quenching experiments also reveal that the Bi-2223 phase is stable in a limited temperature interval between 810 and 830{degrees}C.

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Pages: (8 p)

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OSTI; NTIS; GPO Dep.

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  • Material Research Society spring meeting, San Francisco, CA (United States), 27 Apr - 2 May 1992

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  • Other: DE92015187
  • Report No.: ANL/CP-73655
  • Report No.: CONF-920402--23
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 5266846
  • Archival Resource Key: ark:/67531/metadc1072511

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  • April 1, 1992

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  • Feb. 4, 2018, 10:51 a.m.

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  • April 17, 2018, 3:34 p.m.

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Luo, J.S.; Merchant, N.; Maroni, V.A.; Gruen, D.M.; Tani, B.S. (Argonne National Lab., IL (United States)); Carter, W.L. et al. A study of parameters that influence growth and stability of the (Bi sub 1 minus x Pb sub x ) sub 2 Sr sub 2 Ca sub 2 Cu sub 3 O sub y phase, article, April 1, 1992; Illinois. (digital.library.unt.edu/ark:/67531/metadc1072511/: accessed October 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.