Nanopolycrystalline Diamond Sintered from Onion-Like Carbon

Figure 5

HRTEM images of the nPCD compact sintered for 15 min at 5.5 GPa and 1200°C from the OLC annealed at 1100°C: (a), (b), (d) high-resolution, and (c) low-resolution.

(a)

(b)

(c)

(d)