Slip systems alumina

Figure 6.2 (a) The hexagonal dose-packed structure of a-alumina. (b) Two important slip systems, basal (0001) [0001] and prismatic (0110)[2110], in a hexagonal structure. 

At high temperatures (above about 1,200°C) alumina can deform by dislocation motion. The important paper by Merritt Kronberg [26], see also [1], p. 32, and [27], showed the details of dislocation motion in alumina. Basal slip on the close-packed oxygen planes is most common in alumina, with additional slip systems on prism planes. 

The slip system for a-alumina (corundum) is given in Table 17.1. The primary slip plane is the basal plane, (0001) the slip direction is <1120>. The arrangement of atoms on the slip plane was shown in Figure 12.12. For... 

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