High-Temperature Kilocycle Internal Friction in Al2O3 Single Crystals
- 1 December 1961
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 32 (12) , 2573-2579
- https://doi.org/10.1063/1.1728356
Abstract
Dislocation damping in Al2O3 single crystals has been measured to 1850°C. Undeformed specimens show no damping greater than δ = 10−5. Deformed specimens have an exponentially rising damping above 1450°C with an activation energy of 100–120 kcal/mole. The damping is amplitude independent at least to 10−5 strain amplitude. Dislocation densities and distributions for the specimens were determined by surface etching.This publication has 7 references indexed in Scilit:
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