Observations of defects in the layered ternary nitride, CrWN2, using transmission electron microscopy

Abstract

Investigation of the local structure of CrWN ₂ by electron diffraction, medium resolution electron microscopy, and image simulation verify that this nitride possesses the same rhombohedral-based structure and AA′BB′CC′AA′BB′CC′… layered stacking sequence as found for LiMoN ₂ . Two distinctive types of defects were observed in this compound, including twinning and intergrowth defects, which probably arise as an inherent consequence of this crystal structure type. An analysis and a description of the relationship between the crystal structure and common defects in CrWN ₂ are discussed.