Abstract
Constant strain rate compressive tests and preliminary, constant load, compressive creep tests were carried out on lithium oxide single crystals at elevated temperatures. In the constant strain rate compressive tests the plasticity increased with temperature above 623 K, and almost no plastic deformation occurred below 600 K. The critical resolved shear stress decreased substantially from 620 to 750 K and appeared to become a constant value above 750 K. The (001) [ 1 ¯ 1 0 ] slip system was found to be operating in the temperature range from 623 to 896 K. In the compressive creep tests the creep behavior at 688 and 735 K was quite different from that in the temperature range from 765 to 919 K.
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