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Effect of microcracking on the measured moduli of bulk YBa2Cu3Ox

Published online by Cambridge University Press:  31 January 2011

D. J. Holcomb  and
M. J. Mayo
D. J. Holcomb
Affiliation:
Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185
M. J. Mayo
Affiliation:
Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185
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Abstract

Elastic moduli of both as-hot-pressed and oxygenated YBa2Cu3Ox were measured, under isostatic pressures up to 1 GPa, using a combination of strain gage and ultrasonic techniques. Pressurization of the as-hot-pressed samples caused no significant change in moduli; however, pressurization of the oxygenated sample produced a 5-fold increase in bulk modulus. The results show that the significant decreases in moduli between the as-hot-pressed and the oxygenated state were due to extensive microcracking, of an extremely fine nature, that occurred during the oxygenating sequence.

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Journal of Materials Research , Volume 5 , Issue 9 , September 1990 , pp. 1827 - 1833
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Copyright © Materials Research Society 1990

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