Nanopolycrystalline Diamond Sintered from Onion-Like Carbon

Figure 4

XRD patterns of nPCD compacts sintered for 15 min at 5.5 GPa and 1200°C from OLCs annealed at (a) 900°C; (b) 1000°C; (c) 1100°C; (d) 1200°C; (e) 1300°C; (f) 1400°C.