Published August 1992 | Version v1
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Phase chemistry and microstructure evolution in silver-clad (Bi2-xPbx)Sr2Ca2Cu3Oy filaments

Creators

  • 1. Argonne National Lab., IL (United States)
  • 2. American Superconductor Corp., Watertown, MA (United States)

Description

The reaction kinetics and mechanism that control the conversion of (Bi,Pb)2Sr2CaCu2Oz (Bi-2212) + alkaline earth cuporates to (Bi, Pb)2Sr2Ca2Cu3Oy (Bi-2223) in silver-clad wires were investigated as a function of equilibration temperature and time at a fixed oxygen partial pressure (7.5% O2). Measured values for the fractional conversion of Bi-2223 versus time have been evaluated based on the Avrami equation. SEM and TEM studies of partially and fully converted wires have revealed that (1) the growth of Bi-2223 is two-dimensional and controlled by a diffusion process, (2) liquid phases are present during part of the Bi-2212 -> Bi-2212 conversion, and (3) segregation of the second phases occurs in early time domains of the reaction

Availability note (English)

MF available from INIS under the Report Number; OSTI as DE92040716; NTIS; INIS; US Govt. Printing Office Dep.

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Additional details

Publishing Information

Imprint Pagination
5 p.
Report number
ANL/CP--75798

Conference

Title
Applied superconductivity conference.
Dates
23-28 Aug 1992.
Place
Chicago, IL (United States).

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
24014239
Subject category
S36: MATERIALS SCIENCE; S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Resource subtype / Literary indicator
Conference
Descriptors DEI
BISMUTH OXIDES; CALCIUM OXIDES; CHEMICAL REACTION KINETICS; CUPRATES; FILAMENTS; LEAD OXIDES; MICROSTRUCTURE; PHASE STUDIES; SILVER; STRONTIUM OXIDES; SUPERCONDUCTING WIRES; X-RAY DIFFRACTION
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CHALCOGENIDES; COHERENT SCATTERING; COPPER COMPOUNDS; CRYSTAL STRUCTURE; DIFFRACTION; ELEMENTS; KINETICS; LEAD COMPOUNDS; METALS; OXIDES; OXYGEN COMPOUNDS; REACTION KINETICS; SCATTERING; STRONTIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS; WIRES

Optional Information

Contract/Grant/Project number
Contract W-31109-ENG-38
Funding organization
USDOE, Washington, DC (United States).
Secondary number(s)
CONF-920802--3.