The existence regions of structural modifications in decagonal Al-Co-Ni
The existence regions of structural modifications in decagonal Al-Co-Ni
复制标题
DOI：
10.1080/095008398178048
复制
发表时间：
1998-08
影响因子：
1.2
通讯作者：
S. Ritsch;C. Beeli;H. Nissen;T. Godecke;M. Scheffer;R. Lück
中科院分区：
文献类型：
--
作者：
S. Ritsch;C. Beeli;H. Nissen;T. Godecke;M. Scheffer;R. Lück
本文将Al-Co-Ni十次准晶的稳定区划分为八种不同的结构变化，并将其划分为沿着十次准晶相最大延伸方向的温度-成分截面。唯一的方法确定这细分是透射电子显微镜技术。除了两个十次超结构（其中之一也存在作为一个高温修改），基本十次状态的两个变体被观察到。此外，一维周期性五重准晶（连同其高温超结构修改）和一维准晶是准晶稳定区的一部分。两者都与十边形国家有着密切的结构关系。所研究的所有样品均通过从相应温度淬火获得。这八种变形可以通过一组属性来区分，特别是通过电子束平行于唯一的周期轴所拍摄的特征衍射图案来区分。
A subdivision of the stability region of decagonal Al-Co-Ni quasicrystals into eight different structural modifications is presented for the temperature against composition section along the maximum extension of the decagonal phase. The only methods identifying this subdivision are transmission electron microscopy techniques. Besides two decagonal superstructures (one of which also exists as a high-temperature modification), two variants of the basic decagonal state were observed. Also, a one-dimensionally periodic fivefold quasicrystal (together with its high-temperature superstructure modification) and a one-dimensional quasicrystal are parts of the quasicrystalline stability region. Both have a close structural relationship to the decagonal states. All samples investigated were obtained by quenching from the corresponding temperatures. The eight modifications can be differentiated by a set of attributes, especially by their characteristic diffraction patterns taken with the electron beam parallel to the unique periodic axis.