Deformation twinning in LiAlO2 at elevated temperatures

Abstract High temperature compressive tests were carried out on γ-LiAlO 2 single crystals along their [1 0 0] and [0 0 1] directions. It was found that the LiAlO 2 crystal deformed via a twinning process while compressed along [1 0 0]. The twinning elements for the observed deformation twin are summarized as K 1 : ( 1 1 ¯ 2 ) , K 2 : ( 1 ¯ 1 2 ) , η 1 : [ 1 ¯ 1 1 ] , η 2 : [ 1 1 ¯ 1 ] , and s  = 0.305. No dislocation slips were observed associated with the twinning. When the crystal was compressed along [0 0 1], no twins but cracks were observed.