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|Title:||Screw twinning in monoclinic zirconia|
|Authors:||Choudhry, M Arshad|
Javed, M Zafar
|Abstract:||A geometrical approach based on the criteria of minimum shuffling after the simple shear and least distortion in bonding is used to find out the acceptable twin boundary structures for (100) and (001) twins in monoclinic zirconia. Possible twin boundary structure for (100) and (001) twins are suggested. The proposed structure for twinning on (100) is within an orientation which can be described as a rotation of π about η<sub>1</sub> plus translation of (1/2)<i style="">c</i> or reflection in K<sub>1</sub> plus a (1/2)<i style="">b</i> glide. The proposed structure for (001) twin is in an orientation which can be described as rotation of π about η<sub>1</sub> plus translation of (1/2)<i style="">a</i> or reflection in K<sub>1</sub> plus a (1/2)<i style="">b</i> glide. These orientation relations are not those which are classically defined for deformation twinning. This may be termed as screw orientation relation.|
|ISSN:||0975-1041 (Online); 0019-5596 (Print)|
|Appears in Collections:||IJPAP Vol.47(07) [July 2009]|
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