Plasma Nitriding of Surface Mo-Enriched Sintered Iron

Figure 3

Optical micrographs of the cross-sections of plasma nitrided plain iron samples: (a) N5TA nitrided under 5 vol.% of N₂ and 540°C; (b) N5TB nitrided under 5 vol% of N₂ and 450°C; (c) N75TA nitrided under 75 vol.% of N₂ and 540°C; (d) N75TB nitrided under 75 vol.% of N₂ and 450°C.

(a)

(b)

(c)

(d)