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Harper-Dorn and power law creep in single crystalline MgO

AuthorsRuano, Oscar Antonio; Wolfenstine, J.; Wadsworth, J.; Sherby, O. D.
Single crystal
Issue Date1992
PublisherAmerican Ceramic Society
CitationJournal of the American Ceramic Society 75(7) : 1737-1741 (1992)
AbstractThe creep behavior of single-crystalline MgO tested in the 〈100〉 direction is reviewed in the temperature range 1300° to 1800°C. At low stresses, the stress exponent is equal to about unity, and the deformation process is attributed to Harper–Dorn creep. At high stresses, the stress exponent is equal to approximately 5 and the deformation process is attributed to dislocation glide controlled by climb. The creep behavior in both regions is successfully predicted by an internal stress model for Harper–Dorn creep.
Publisher version (URL)http://dx.doi.org/10.1111/j.1151-2916.1992.tb07190.x
Appears in Collections:(CENIM) Artículos
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