Annealing and mechanical properties of bulk Y-Ba-Cu-O.

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Single-domain melt-processed YBa{sub 2}Cu{sub 3}O{sub x}/Y{sub 2}BaCuO{sub 5} and conventional polycrystalline sintered YBa{sub 2}Cu{sub 3}O{sub x} pellets were prepared. Elastic modulus, hardness, and fracture strength were measured on selected sections cut from the pellets. Strength in the melt-processed pellets ranged from 32 to 94 MPa and was highest in the center. Variations in strength were related to microstructural features, especially Y{sub 2}BaCuO{sub 5} distribution. To improve strength, we attempted to minimize microcracking by manipulating cooling rates, annealing times, and oxygen partial pressure. Extent of cracking was evaluated by electron microscopy and change in elastic modulus and strength. We found that ... continued below

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18 p.

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Goretta, K. C. September 11, 1998.

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Single-domain melt-processed YBa{sub 2}Cu{sub 3}O{sub x}/Y{sub 2}BaCuO{sub 5} and conventional polycrystalline sintered YBa{sub 2}Cu{sub 3}O{sub x} pellets were prepared. Elastic modulus, hardness, and fracture strength were measured on selected sections cut from the pellets. Strength in the melt-processed pellets ranged from 32 to 94 MPa and was highest in the center. Variations in strength were related to microstructural features, especially Y{sub 2}BaCuO{sub 5} distribution. To improve strength, we attempted to minimize microcracking by manipulating cooling rates, annealing times, and oxygen partial pressure. Extent of cracking was evaluated by electron microscopy and change in elastic modulus and strength. We found that control of annealing reduced microcracking of the polycrystalline sintered pellets, but had little effect on the single-domain melt-processed pellets.

Physical Description

18 p.

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OSTI as DE00010709

Medium: P; Size: 18 pages

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  • 1998 Applied Superconductivity Conference, Palm Desert, CA (US), 09/13/1998--09/18/1998

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  • Report No.: ANL/ET/CP-96002
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 10709
  • Archival Resource Key: ark:/67531/metadc628162

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  • September 11, 1998

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  • June 16, 2015, 7:43 a.m.

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  • April 7, 2017, 4:05 p.m.

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Goretta, K. C. Annealing and mechanical properties of bulk Y-Ba-Cu-O., article, September 11, 1998; Illinois. (digital.library.unt.edu/ark:/67531/metadc628162/: accessed October 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.