Observation of Dislocations

摘要: This chapter discusses the observation of dislocations. A wide range techniques has been used to study distribution, arrangement and density dislocations, determine their properties. The can be divided into five main groups: surface methods, decoration transmission electron microscopy, X-ray diffraction, field ion microscopy. Except for microscopy isolated examples these do not directly reveal atoms at dislocation, but rely on such features as strain dislocation makes them visible. Computer-based methods have also employed extensively in recent years. Computer simulation used, example, assist analysis images obtained by predict atomic configuration around dislocations model crystals.