Increasing the milling time continually, a-Fe(C) of monophase BCC transfer to FeC intermetallic compound, when x=1, the sample has became Fe5C2 intermetallic compound with monoclinic structure after ball milled 255 hours.

• 从X-ray衍射谱的分析可看出,这是由于样品发生了相变,从单相体心立方结构的a-Fe(C)固溶体向FeC金属间化合物转变。 x=1的样品,经255h球磨后,样品成为单相Fe5C2金属间化物,它具有单斜晶体结构。