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IJPAP Vol.47(07) [July 2009] >


Title: Screw twinning in monoclinic zirconia
Authors: Choudhry, M Arshad
Javed, M Zafar
Keywords: Twinning
Orientation relation
Zirconia
Issue Date: Jul-2009
Publisher: CSIR
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 η1 plus translation of (1/2)c or reflection in K1 plus a (1/2)b glide. The proposed structure for (001) twin is in an orientation which can be described as rotation of π about η1 plus translation of (1/2)a or reflection in K1 plus a (1/2)b glide. These orientation relations are not those which are classically defined for deformation twinning. This may be termed as screw orientation relation.
Page(s): 506-510
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Source:IJPAP Vol.47(07) [July 2009]

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