【摘要】 用电子衍射和高分辨电子显微术研究了永磁合金Ce₁₅Fe（77）B₀中富硼相Ce₁₊₈Fe₃B₄（8≈0.1）的晶体结构,确定了Ce₁₊₈Fe₄B₄合金具有烟囱-梯子型一维无公度调制结构,它由Ce原子和Fe-B原子团分别组成的两套亚结构相互嵌套形成。Ce亚结构晶胞参数为a=7.08A,c_Co=3.51—3.60A,可能空间群为I4,I4,I4mm,I4/m,I4/mmm;Fe-B亚结构晶胞参数为a=7.08A,c_Fo=3.91A,空间群为P4₂/mcm。 用四指数（h,k,l₁,l₂）方法指标化了全部主衍射和卫星衍射。在电子显微象上看到有相应于调制结构的带状衬度调制。观察到Ce亚结构晶胞参数的起伏,并对此现象进行了讨论。也讨论了由于Ce原子面可能偏离（a,b）面而产生的取向反常现象。更多还原

【Abstract】 The permanent magnetic alloy Ce1+eFe4B4（ε = 0.1, B-rich phase） is studied by means of electron diffraction and high resolution electron microscopy. It has been determined that the Ce1+eFe4B4 alloy has a one-dimensional incommensurate modulated structure of Chimney-Ladder type consisting of two overlapped substructures fomed by Ce atoms and Fe-B clusters respectively. The unit cell parameters of Ce substructure are a = 7.08 A, cce= 3.51-3.60 A, and the possible space groups are /4,/4,/4mm, /4/m, /4/mmm. The unit cell parameters of Fe-B substructure are a = 7.08 A , cFe= 3.91 A, and the space group is P/4₂/mcm.All of the major and satellite diffraction spots are indexed by using of four indexes method. The high resolution electron microscopic image shows contrast modulation bands corresponding to the modulated structure. The fluctuation of the period of Ce substructure has been observed and discussed. The orientational anormaly caused by the possible deviation of Ce atomic planes from the （a, b） plane is also discused.更多还原