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Chemical interaction of BaO-CuO-rich melts with Y2O3

Published online by Cambridge University Press:  18 February 2016

N. Pellerin ,
G. Jouan  and
P. Odier
N. Pellerin
Affiliation:
Centre de Recherches sur la Physique des Hautes Témperatures, C.N.R.S., 45071 Orléans Cedex 2, France
G. Jouan
Affiliation:
Centre de Recherches sur la Physique des Hautes Témperatures, C.N.R.S., 45071 Orléans Cedex 2, France
P. Odier
Affiliation:
Centre de Recherches sur la Physique des Hautes Témperatures, C.N.R.S., 45071 Orléans Cedex 2, France
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Extract

Chemical interaction between ceramic Y2O3 and Y - Ba-Cu-O liquid with composition close to that of the ternary eutectic is discussed. Intense interaction is observed in the range 930–960 °C that results in the formation of Y2BaCuO5 above 940 °C and YBa2Cu3O6+x plus CuO below 940 °C. At the interface with Y2O3 there is an additional portion containing Y2Cu2O5 or YCuO2. This temperature threshold is exactly that of the peritectic reaction Y2BaCuO5 + L(pl) → YBa2Cu3O6+x + CuO which then appears to control this chemical interaction. The microstructure of the transformed area is oriented in a way that may be used for texturing or crystal growing.

Type
Research Article
Information
Journal of Materials Research , Volume 8 , Issue 1 , January 1993 , pp. 18 - 23
Copyright
Copyright © Materials Research Society 1993

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