The hyperfine fields and isomer shift at Fe-Co metal inclusions in synthetic diamond grains |
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| Authors: | K. Bharuth-Ram V. V. Naicker M. Fish |
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| Affiliation: | (1) University of Durban-Westville, 4000 Durban, South Africa;(2) De Beers Diamond Research Laboratory, 2000 Johannesburg, South Africa |
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| Abstract: | The thermal changes taking place at the sites of Fe-Co metal inclusions in synthetic diamond grains have been investigated using Mössbauer spectroscopy on as-grown samples and samples annealed at 970–1370 K. The spectra show the presence of Fe-Co and (Fe-Co)-C complexes. The temperature-dependent results suggest that the latter are due to reactions at the metal inclusion-diamond interface, and may be a signature of the processes leading to strength loss in the grains. |
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