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在二十面体准晶i-AlCuFeB颗粒增强的Al基复合材料[Al/(AlCuFeB)p]中发现了AlCuFe二十面体准晶的一种新的大单胞晶态近似相。分别用透射电镜和高分辨电镜对此近似相进行了分析,确定其结构为B心正交,其点阵常数是a=1.166nm,b=1.195nm及c=3.44nm。高分辨像还进一步给出了该相在一个伪5次轴晶面内的原子团排列情况。
A new monocytic crystalline phase of AlCuFe icosahedral quasicrystals was found in the icosahedral quasicrystalline i-AlCuFeB particle reinforced Al matrix composites [Al / (AlCuFeB) p]. The approximate phase was analyzed by TEM and high resolution electron microscope respectively. The structure was determined to be B-centered and orthogonal. The lattice constants were a = 1.166nm, b = 1.195nm and c = 3.44nm. The high resolution image further gives the atomic arrangement of the phase in a pseudo 5th-axis crystal plane.