Electron microscopy studies of dislocations in diamond synthesized by a cvd method

作者：Kosuke Suzuki, Masaki Ichihara, Shoji Takeuchi, N. Ohtake, Masao Yoshikawa, Keiji Hirabayashi, Noriko Iwasaki Kurihara · 发表于：Philosophical magazine. A/Philosophical magazine. A. Physics of condensed matter. Structure, defects and mechanical properties · 年份：1992 · DOI：10.1080/01418619208201542 · 被引用次数：24 · 研究领域：Diamond and Carbon-based Materials Research、Ion-surface interactions and analysis、Electronic and Structural Properties of Oxides

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<110>, 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.