By using conversion electron M?ssbauer spectroscopy (CEMS) and slow positron beam Doppler broading spectrum,the behaviour of the 57Fe implanted (100keV,3×1016 at./cm2) ZYx contained Y2O3 has been studied.The states of Fe0,Fe2+ and Fe3+ ions were obtained from CEMS for as implanted samples.After annealing at 500℃,metallic iron particles α-Fe, were formed at expense of other components. From the S-E curve of the 57Fe as implanted sample,it was found that a large amount of cationic vacancies were distributed in a region of 0—50nm in ZY3.These vacancies disappeared largely after annealing at 500℃.Therefore the parameter S provided an evidence to identify the iron sites in the implanted sample.The ZY3 appeared mingle conducting property at 300℃.It probably correlates with different iron charge states,especially with that of Fe0.