R Chang and P W Graves 1965 Br. J. Appl. Phys. 16 715 doi:10.1088/0508-3443/16/5/316
R Chang and P W Graves
Show affiliationsThe effect of creep deformation in air on the d.c. conductivity of undoped and Cr-doped alumina crystals was studied by measuring directly the change of conductivity with creep strain. At temperatures near 1550°C and small strains, there is a decrease in d.c. conductivity of about 1.3 × 10-3 and 1.3 × 10-4 ohm-1 cm-1 per unit strain, respectively, for the undoped and Cr-doped (0.34 wt% Cr) specimens. Possible mechanisms for the observed decrease in d.c. conductivity with creep deformation in terms of scattering by dislocations are suggested.
81.40.Lm Deformation, plasticity, and creep
61.72.Ss Impurity concentration, distribution, and gradients
62.20.Fe Deformation and plasticity (including yield, ductility, and superplasticity)
Issue 5 (May 1965)
Received 27 November 1964
R Chang and P W Graves 1965 Br. J. Appl. Phys. 16 715
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