Magnetic properties of iron nitride particles prepared with reactive gas evaporation method were investigated. Major products for higher NH3gas pressure region is γ'Fe4N and αFe. For lower pressure region αFe was produced, which was oxidized to Fe3O4after exposure to air. It is found that particles consist of γ'Fe4N and γFe are more persistent to oxidation comparing to those of αFe.
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Saegusa et al. (1983) studied this question.
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