Published August 1992 | Version v1
Report Open

Melt processing of the Bi2Sr2CaCu2Oy superconductor in oxygen and argon atmospheres

Creators

  • 1. Argonne National Lab., IL (United States)
  • 2. Ames Lab., IA (United States)

Description

Solidification and subsequent annealing of Bi2Sr2CaCu2Oy (2212) in oxygen and argon atmospheres were investigated in order to identify alternative processing routes for controlling microstructures and superconducting properties. In addition to 2212, several other phases formed on cooling in O2 and did not disappear upon subsequent annealing. Crystallization in Ar resulted in a divorced eutetic structure of Bi2Sr3-xCaxOy and Cu2O/CuO. The superconductor was formed on subsequent anneals. Samples melted in Ar and then annealed generally possessed a more uniform microstructure compared with samples that were melted in oxygen and annealed. Compositional measurements of the 2212 phase suggest that CaO segregation in the melt may be minimized with an overall composition such as Bi2.15Sr2Ca0.85Cu2Oy

Availability note (English)

MF available from INIS under the Report Number; OSTI as DE93002999; NTIS; INIS; US Govt. Printing Office Dep.

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Additional details

Publishing Information

Imprint Pagination
5 p.
Report number
ANL/CP--77532

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
24035094
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S36: MATERIALS SCIENCE;
Resource subtype / Literary indicator
Conference
Descriptors DEI
ANNEALING; ARGON; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; COPPER OXIDES; FABRICATION; MELTING; OXYGEN; STRONTIUM COMPOUNDS; SUPERCONDUCTORS
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; ELEMENTS; HEAT TREATMENTS; NONMETALS; OXIDES; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; RARE GASES; TRANSITION ELEMENT COMPOUNDS

Optional Information

Contract/Grant/Project number
Contract W-31109-ENG-38; W-7405-ENG-82; Contract DMR-8809854
Funding organization
USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States).
Secondary number(s)
CONF-920802--31.