Abstract

Abstract High-density dislocations (∼5 × 108 cm−2) in diamond crystallites synthesized by a chemical vapour deposition method have been studied by electron microscopy. Most of the dislocations, having the Burgers vector of ½ , are seen undissociated by the weak-beam observation and are often zigzag in shape on a climb-plane. Some dislocations lying on {111} glide planes are dissociated into Shockley partials. The stacking fault energy estimated from the separation of the partials is 290 ± 40 mJm−2, which is substantially the same as that reported for natural diamond. In some crystallites, high-density twins are observed instead of dislocations.

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