Crystal structure of the orthorhombic Al-4(Cr, Fe) approximant of the Al-Cr-Fe decagonal quasicrystal
文献类型：期刊论文
| 作者 | Deng, DW ; Mo, ZM ; Kuo, KH |
| 刊名 | JOURNAL OF PHYSICS-CONDENSED MATTER
 |
| 出版日期 | 2004 |
| 卷号 | 16期号:13页码:2283 |
| 关键词 | KAPPA-PHASE NI SYSTEM ALLOYS EQUILIBRIA CLUSTER FAMILY MODEL |
| ISSN号 | 0953-8984 |
| 通讯作者 | Deng, DW: Dalian Univ Technol, Dept Mech Engn, Dalian 116023, Peoples R China. |
| 中文摘要 | The crystal structure of the orthorhombic phase Al-4(Cr, Fe) with a composition of Al80.6Cr10.7Fe8.7 has been determined by single-crystal x-ray diffraction (table 2). There are 11 crystallographically independent Cr/Fe sites, of which 10 are icosahedrally coordinated. Of the 28 crystallographically independent Al sites 5 are icosahedrally coordinated. However, owing to the presence of many partial occupancies, caused by split atoms, some of these coordinations are only pseudo-icosahedral with effective coordination numbers C(eff)not equal12 (section 4.3). The icosahedral and pseudo-icosahedral clusters are oriented with a two-fold axis parallel to [100]. They are linked either by vertex-, edge-or face-sharing or by mutual interpenetration, thus forming large clusters of icosahedra in the (100) layers with one of the five-fold axes in the [0101 direction. Four of the 12 atoms defining the vertices of an icosahedral cluster lie in a mirror plane (F plane), while the other atoms are in puckered layers below and above the mirror plane. Thus, the icosahedral cluster consists of layers PFP' of three atoms thick. Two such layers stack within one lattice constant aapproximate to1.25 nm. The interconnection of icosahedra in the PFP' layer block forms large triangular and hexagonal structural motifs, though they have only two-fold rotational symmetry. Similar geometrical motifs but displaying three- or six-fold symmetry do exist in the structure of the hexagonal mu-Al4Mn, K-(AlCrNi), lambda-Al4Mn and v-Al12Cr2Fe phases. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/35403]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Deng, DW,Mo, ZM,Kuo, KH. Crystal structure of the orthorhombic Al-4(Cr, Fe) approximant of the Al-Cr-Fe decagonal quasicrystal[J]. JOURNAL OF PHYSICS-CONDENSED MATTER,2004,16(13):2283. |
| APA | Deng, DW,Mo, ZM,&Kuo, KH.(2004).Crystal structure of the orthorhombic Al-4(Cr, Fe) approximant of the Al-Cr-Fe decagonal quasicrystal.JOURNAL OF PHYSICS-CONDENSED MATTER,16(13),2283. |
| MLA | Deng, DW,et al."Crystal structure of the orthorhombic Al-4(Cr, Fe) approximant of the Al-Cr-Fe decagonal quasicrystal".JOURNAL OF PHYSICS-CONDENSED MATTER 16.13(2004):2283. |
入库方式： OAI收割
来源：物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。