The Mechanical Alloying Behavior of Fe₂O₃ into NiO in the High-Energy Ball-Milling Process

Figure 2

Secondary electron images (SEI) in SEM of the milled powders with different milling time; (a) for 0 h, (b) for 0.5 h, (c) for 2 h, (d) for 10 h.

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(b)

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(d)