. It is believed that FeP experienced sintering and agglomeration increasing the particle size to length scales that are now in excess of the diffusional length scale. During the oxidation
,
a similar reduction in weight gain was observed for the iron oxide powders due to sintering or agglomeration. Values for the 80–160 lm and 40–80 lm particles were similar in both cycles,
although the larger particles presented a higher oxidation rate