Abstract:

The authors studied the inclusions in diamond synthesized from Fe\|Ni catalyst and formation mechanism. The results show that the  main components of the inclusions were Fe-Ni catalyst and Fe3C in diamond, and the puncate distribution of the inclusions  increased gradually with the increasing growth rate of the diamond,  and the growth models for the incorporation of the inclusions were  different at different temperatures, and the hardness of the synthesized diamond decreased with the increasing of the  inclusions in diamond.  The authors synthesized the extra low inclusions, and the  size of the  diamond single cryststals is about  0.6—0.7 mm by means of the adjustment of the synthesis technology.

Key words: diamond, inclusion, Fe\, Ni catalyst, Mssbauer spectrum