球磨合成Fe3Al金属间化合物及其固相反应机理

Fe3Al金属间化合物是一种新型耐高温材料，并因其电热和磁性能受到重视。本文研究由铁、铝元素混合粉末利用高能球磨工艺合成Fe3Al。通过对冷焊现象的分析，用适量的有机物有效地控制了机械合金化过程。利用X射线衍射研究了反应物在球磨过程中的结构演变。通过对Fe／Al固相反应热力学的分析，认为Fe／Al原子比相等成分附近，固相反应最容易进行。

Synthesis of iron aluminides powder by ball milling and corresponding room temperature solid reaction

Iron aluminides and alloys based on such compounds were materials of rapidly growing technological importance. Such alloys were of considerable interest in structural, magnetic and electrothermal applications. Iron aluminides was achieved through high energy ball milling of blended elemental Fe and Al powders in this paper. X-ray diffraction (XRD) was employed to follow the structural evolution of the blended powders milled in Ar atmosphere and alcohol respectively, revealing that alloying takes place in Ar, but not in alcohol. Process controlling agent(PCA) was added during mechanically alloying of iron aluminides, based on the investigation of cold welding phenomenon. The thermodynamic analysis indicats that solid reaction for Fe/Al blended powders was facile near equal-atom composition.