703168.fig.005a
(a)
703168.fig.005b
(b)
703168.fig.005c
(c)
703168.fig.005d
(d)
Figure 5: SEM pictures of Ni-B coatings: (a) asdeposited, (b) annealed at 250°C, (c) annealed at 350°C, and (d) annealed at 450°C.