J Mater Sci Technol ›› 2001, Vol. 17 ›› Issue (05): 553-555.

• Research Articles • Previous Articles     Next Articles

Structural imperfections associated with supersaturated vacancies in an HPHT-grown diamond single crystal

Longwei YIN, Musen LI, Dongsheng SUN, Zhangying YAO, Jianjun CUI, Zhaoyin HAO   

  1. School of Materials Science and Engineering, Shandong University, Jinan 250061, China...
  • Received:2000-08-28 Revised:2000-10-13 Online:2001-09-28 Published:2009-10-10
  • Contact: Longwei YIN

Abstract: A diamond single crystal, which was synthesized at a high temperature of 1570 K and a high pressure of 5.5 GPa in a Fe-Ni-C system, was directly and systematically examined by transmission electron microscopy (TEM). It is proposed that there exists a variety of imperfections such as dislocation loops, stacking faults, twins and stacking-fault tetrahedral in the diamond, which may be derived from the supersaturated vacancies generated during rapid cooling from high temperature. The formation process of the imperfections is discussed briefly.

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