利用X射线衍射研究了α-Fe与Fe3混合粉末机械合金化过程中结构的变化．并测量了球磨不同时间后其饱和磁化强度的变化结果表明，随着球磨时间的延长，Fe3N相迅速分解直至消失，N原子部分固溶于α-Fe中，24h后可形成稳定的α-Fe（N）过饱和固溶体，其中N的质量分数约为0．290％-0．346％．随着球磨时间的延长,α-Fe的晶粒尺寸逐渐减小，24h后趋于定值，约为8nm．球磨引起样品中Fe原子周围N原子位置的变化，使得球磨过程中混合粉末的饱和磁化强度开始时降低，5h后又有所增加，24h后达到一定值
The X-ray diffraction was used to monitor the structure change of a mixture of α-Fe and Fe3N powders during ball milling. The change of saturation magnetization of the mixture powder was also measured. The results showed that Fe3N decomposed quickly with increasing milling time and disappeared after milling for 2 h, and some N atoms soluted in α-Fe. After milling for 24 h, a stable supersaturation solid solution was obtained. N content was about 0.290%-0.346%. With increasing milling time, the grain size decreased. After milling for 24 h, grain size reached a constant which is about 8 urn. The sites of N atoms nearby Fe atom changed during milling, so the saturation magnetization of the mixture powder initially decreased, but began to increase when milling time exceeded 5 h, and reached a constant when milling time exceeded 24 h.
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