The XRD patterns of the original powders milled for different times and subsequently autoxidized in the air for 2 h.
Temperature dependences of normalized ZFC magnetization for the sintered samples.
The measured characteristics of the sample milled for 5 h and the reference sample (Ref. 6) at 20 K.
The XRD pattern of the samples sintered at for 0.5 h.
The SEM images of the samples sintered at for 0.5 h with (a) the reference sample and (b) the sample milled for 5 h.
The HRTEM images of the sample milled for 5 h and sintered at for 0.5 h exhibiting (a) the dislocations in the grains, (b) the MgO nanoinclusions within the grains, and (c) the magnified image of the area [marked by the rectangle in Fig. 6(b)] beside a MgO nanoinclusion within the grain.
The measured DSC curves of the sample milled for 5 h and the reference sample (Ref. 6) during the sintering process.
The X-ray diffraction patterns of the samples milled for 5 h and sintered at different temperatures.
The schematic diagram of the sintering model for different stages during the entire solid-solid reaction with (a) the initial stage, (b) the reaction between Mg and , and (c) the formation of phase.
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