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The synthesis of diamond single crystal in the Fe_(64)-Ni_(36)-C system with h-BN additive is investigated at pressure6.5 GPa and temperature range of 1300~140℃.The color of the obtained diamond crystals translates from yellow to dark green with increasing the h-BN addition.Fourier-transform infrared(FTIR) results indicate that sp~2 hybridization B-N-B and B-N structures generate when the additive content reaches a certain value in the system.The two peaks are located at 745 and 1425 cm~(-1),respectively Furthermore,the FTIR characteristic peak resulting from nitrogen pairs is noticed and it tends to vanish when the h-BN addition reaches 1.1 wt%.Furthermore,Raman peak of the synthesized diamond shifts down to a lower wavenumber with increasing the h-BN addition content in the synthesis system.
The synthesis of diamond single crystal in the Fe_ (64) -Ni_ (36) -C system with h-BN additive is investigated at pressure 6.5 GPa and temperature range of 1300~140 ° C. The color of the obtained diamond crystals translates from yellow to dark green with increasing the h-BN addition. Fourier-transform infrared (FTIR) results indicate that sp ~ 2 hybridization BNB and BN structures generate when the additive content reaches a certain value in the system. The two peaks are located at 745 and 1425 cm -1 respectively, the FTIR characteristic peak resulting from nitrogen pairs is noticed and it tends to vanish when the h-BN addition reaches 1.1 wt% .Furthermore, Raman peak of the synthesized diamond shifts down to a lower wavenumber with increasing the h-BN addition content in the synthesis system.