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Elastic constants of polycrystalline Y1Ba2Cu3Ox

Published online by Cambridge University Press:  31 January 2011

Hassel Ledbetter
Hassel Ledbetter
Affiliation:
Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Boulder, Colorado 80303
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Abstract

We measured the elastic constants of polycrystalline Y1Ba2Cu3Ox with eleven oxygen contents varying from 6.2 to 6.9. Reported properties include sound velocities; bulk, shear, Young's moduli; Poisson ratio; Debye temperature. After correction to the void-free state, the measurements fail to show a systematic dependence on oxygen content. Focusing on the bulk modulus, all measurements fall below an ionic-crystal model prediction, by 5–50%. We attribute this macroscopic softness to either microcracks or weak grain-boundary mechanical linkages. For the case x = 6.9, we suggest a set of intrinsic elastic constants.

Type
Rapid Communications
Information
Journal of Materials Research , Volume 7 , Issue 11 , November 1992 , pp. 2905 - 2907
Copyright
Copyright © Materials Research Society 1992

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