A family of hexagonal and orthorhombic (Al,Si)(4)Cr approximants of quasicrystals
文献类型：期刊论文
| 作者 | He, ZB ; Kuo, KH |
| 刊名 | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| 出版日期 | 2006 |
| 卷号 | 424期号:1-2页码:164 |
| 关键词 | AL-CR SYSTEM PHASES EQUILIBRIA ALLOYS |
| ISSN号 | 0925-8388 |
| 通讯作者 | He, ZB: Stockholm Univ, Arrhenius Lab, Dept Struct Chem, SE-10691 Stockholm, Sweden. |
| 中文摘要 | By means of transmission electron microscopy, four crystalline phases with compositions close to (Al,Si)(4)Cr have been found in Al-Cr-Si alloys. The hexagonal mu'-(Al4Si)(4)Cr has the same space group P6(3)/mmc as mu-(Al,Si)(4)Cr, but its c parameter is only one half of c mu. On the other hand, the orthorhombic epsilon-Al4Cr, epsilon'- and epsilon"-(Al,Si)(4)Cr have about the same lattice parameters but different space groups: Bbmm (or Cmcm), Pbnm and P2(1)2(1)2(1), respectively. The lattice parameters of these phases are closely related: a(epsilon,epsilon ',epsilon '') = root 3a(mu,mu ') congruent to 3.46 nm; = b(epsilon,epsilon ',epsilon '') = a(mu,mu ') = 2.00 nm; c(epsilon,epsilon ',epsilon '') = 1/2c(mu) = c(mu ') congruent to 1.24 nm. The symmetry of space group decreases from mu(mu '), epsilon, epsilon ' to epsilon '' and the space groups of any two neighboring phases have the minimal supergroup and the maximal subgroup relationship. Strong diffraction spots of all these phases exhibit pseudo icosahedral symmetry. In the (001) plane, icodahedra are linked by mutual penetration along the five-fold axis forming icosahedral chains in three directions at 120 degrees apart. These four (Al,Si)(4)Cr phases together with the epsilon-Al4Cr are not only structurally close related, but also are approximants of quasicrystals. (c) 2006 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/32900]  |
| 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 | He, ZB,Kuo, KH. A family of hexagonal and orthorhombic (Al,Si)(4)Cr approximants of quasicrystals[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2006,424(1-2):164. |
| APA | He, ZB,&Kuo, KH.(2006).A family of hexagonal and orthorhombic (Al,Si)(4)Cr approximants of quasicrystals.JOURNAL OF ALLOYS AND COMPOUNDS,424(1-2),164. |
| MLA | He, ZB,et al."A family of hexagonal and orthorhombic (Al,Si)(4)Cr approximants of quasicrystals".JOURNAL OF ALLOYS AND COMPOUNDS 424.1-2(2006):164. |
入库方式： OAI收割
来源：物理研究所
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