【摘要】 <正> 我们在氦气氛保护下用急冷法制备了强磁性合金Co_100-xEr_x,x的范围从14至26。发现,当x≈20时,所制备的合金明显表现出不同于同样成分晶态或非晶态合金的性质.X射线的衍射图像表明,它属于正二十面体结构。差热分析和磁性实验的结果表明,这一成分合金的结构状态是介于非晶态和晶态之间的一种亚稳定状态,即所谓“准晶态”（quasicry-stal）。正二十面体旋转对称含有五次对称轴。对于二维或三维周期性晶格结构而言,这种对称更多还原

【Abstract】 Rapidly quenched cobalt-rich alloys Co_100-x Er_x （14≤x≤26） weremade by melt spinning in He atmosphere. For x≈20, the Co-Er alloys show X-raydiffraction patterns in which the dominant phase can be indexed successfully withicosahedral lattice vectors. The quasicrystal Co-Er alloys are strongly magneticshowing many characteristics of sperimagnetism observed in amorphous films ofsimilar composition. The experimental results show typical magnetic properties ofthe icosahedral phase lying between those of the amorphous phase and the crystal-line phase of similar compositions. The quasicrystalline-to-crystalline transforma-tion was observed in the temperature range 385 to 630℃. The observations fuelthe assertion made by Steinhardt et al., that the icosahedral phase is a new typeof structural formula of materials.更多还原