K. Bharuthram et al., THE HYPERFINE FIELDS AND ISOMER-SHIFT AT FE-CO METAL INCLUSIONS IN SYNTHETIC DIAMOND GRAINS, Hyperfine interactions, 93(1-4), 1994, pp. 1795-1799
The thermal changes taking place at the sites of Fe-Co metal inclusion
s in synthetic diamond grains have been investigated using Mossbauer s
pectroscopy on as-grown samples and samples annealed at 970-1370 K. Th
e spectra show the presence of Fe-Co and (Fe-Co)-C complexes. The temp
erature-dependent results suggest that the latter are due to reactions
at the metal inclusion-diamond interface, and may be a signature of t
he processes leading to strength loss in the grains.