Combustion Synthesis of TiC-TiB₂-Based Cermets from Elemental Powders

Figure 12

OM photographs of samples of TiC-TiB₂-Ni(52.5/17.5/30), (a) without preheating and (c) with preheating at 400°C for 24 h, respectively. The monochrome images of (a) and (c) are shown in (b) and (d), respectively, in which the black area approximately reflects the pores by image process using Canvas software.

(a)

(b)

(c)

(d)