P. Veyssiere Stephen H. Kirby 1980 <p>Prism-shaped single crystals of MgO(Al₂O₃)_n<span>&nbsp;</span>spinel (n &lt; 1.1) have been compressed to significant plastic strain at a temperature of 400°C (∼0·28 T_M) in controlled experiments under a superimposed hydrostatic pressure of 1·4 GPa. Compression of crystals approximately parallel to &lt;001&gt;, &lt;111&gt; and &lt;011&gt; resulted in simple yield behaviour at axial stress differences of 1940, 3720, and 4300 MPa respectively. Well defined and broadly distributed slip lines on polished surfaces and stress-optical effects of slip bands have permitted identification of the following operating slip families:</p><p>Typically, the members of the above slip families with the highest Schmid factors operated. Clear evidence for active cross-slip on the system {100}&lt;110&gt; was observed to nucleate from the {111}&lt;110&gt; slip bands in the ∼&lt;011&gt; specimen.</p> application/pdf 10.1080/01418618008241836 en Taylor and Francis Plastic deformation of MgO(A12O2)1·1 spinel at 0·28TM preliminary results article