Influences of oxygen partial pressure on YBCO grain growth by a zone melting method
Journal Article
·
· Journal of Materials Research
- Superconductivity Research Laboratory, ISTEC, 1-10-13 Shinonome Koto-ku, Tokyo 135 (Japan)
This study reports investigation on influences of Y{endash}Ba{endash}Cu{endash}O compounds solidification under different oxygen partial pressures by a zone melting method. In Y{endash}Ba{endash}Cu{endash}O system, {ital P}(O{sub 2}) ranged from 0.02 to 1 atm, following reaction occurred during heating: YBa{sub 2}Cu{sub 3}O{sub 6+{delta}}(Y123){r_arrow}Y{sub 2}BaCuO{sub 5}(Y211)+L. With an increase of oxygen partial pressure or decrease of pulling rate, the morphology of solidified interface changed from mushy to equiaxed, cellular, and planar. The continuous Y123 grains were readily obtained under high oxygen partial pressure. Based on the constitutional supercooling theory and combining the result of the yttrium solubility limit for different oxygen partial pressures, the influences of oxygen partial pressure on Y123 morphological evolution were clarified. {copyright} {ital 1996 Materials Research Society.}
- OSTI ID:
- 399777
- Journal Information:
- Journal of Materials Research, Journal Name: Journal of Materials Research Journal Issue: 11 Vol. 11; ISSN JMREEE; ISSN 0884-2914
- Country of Publication:
- United States
- Language:
- English
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