Author(s): Tsutomu Nakamura
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Keywords: No Keywords
Abstract: Constant strain-rate tensile tests on pure, HF-doped and H202-doped ice single crystals have been carried out at a temperature of -5C. HF-doped crystals showed a softening effect in this temperature as well as in the lower temperatures previously reported. H202-doped crystals showed no remarkable effect at about -5C. A power-law relationship between stress and strain rate was found to hold for the pure and the HF-doped ice crystals with n = 1.85. From these tests, an activation energy for pure ice of 19.4 ± 1.2 kcal/mole and for HF-doped ice of 16.4 ± 2.3 kcal/mole was deduced. An empirical equation to show the degree of the softening effect of HF as a function of temperature was derived.
Year: 1978