Stacking faults and phase transformations in silicon nitride

Issue		Eur. Phys. J. Appl. Phys. Volume 4, Number 2, November 1998


Page(s)		149 - 156
DOI		10.1051/epjap:1998254

DOI: 10.1051/epjap:1998254

Eur. Phys. J. AP 4, 149-156

Stacking faults and phase transformations in silicon nitride

X. Milhet - J.-L. Demenet - J. Rabier

Laboratoire de Métallurgie Physique, Université de Poitiers, UFR Sciences, SP2MI, Boulevard 3, Téléport 2, 86960 Futuroscope Cedex, France

Received: 22 December 1997 / Revised and Accepted: 29 June 1998

Abstract
From observations of extended dislocation nodes in $\b$ silicon nitride, possible stacking fault structures in the basal plane of this compound have been investigated. It has been found that stacking fault structure is locally analogous to $\alpha$ silicon nitride. A phase transformation $\alpha$ to $\b$ or $\b$ to $\alpha$ can also be achieved by cooperative shear of partial dislocations with $1/3\langle1\bar{1}00\r$ Burgers vectors.

PACS
61.72.Ff Direct observation of dislocations and other defects (etch pits, decoration, electron microscopy, x-ray topography, etc.) - 61.50.Ks Crystallographic aspects of phase transformations; pressure effects - 81.05.Je Ceramics and refractories (including borides, carbides, hydrides, nitrides, oxides, and silicides)

Author for correspondance: xavier.milhet@lmp.univ-poitiers.fr

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