...
首页> 外文期刊>Philosophical Magazine Letters >Decagonal quasicrystals (periodicity of 1.24nm and 3.72nm) and their orthorhombic approximants in Al_(67)Cr_(15)Cu_(18)
【24h】

Decagonal quasicrystals (periodicity of 1.24nm and 3.72nm) and their orthorhombic approximants in Al_(67)Cr_(15)Cu_(18)

机译:Al_(67)Cr_(15)Cu_(18)中的八边形准晶体(周期为1.24nm和3.72nm)及其正交晶系近似

获取原文
获取原文并翻译 | 示例
           

摘要

Decagonal quasicrystals with two different periodicities in the tenfold direction, 1.24 nm and 3.72 nm respectively, have been found in rapidly solidified Al67Cr25Cu18. On annealing at 800-950 C, four orthorhombic approximants appeared by substituting rational ratios of two conseuctive Fibonacci numbers (0,1,1,2,3,5,8,13,...) for the irrational in the two orthogonal, quasiperiodic, twofold directions in these decagonal quasicrystals. The (1/1,1/1) approximant has about the same lattice parameters as Al3Mn, whereas those of the (1/0,2/1) are the same as T3-AlMnZn. The (1/0,2/1), (2/1,5/3) and (3/2,8/5) approximants form a family of approximants with a and c parameters in 1:2 3 ratios. Although the (2/1,5/3) approximant has a b parameter of 3 72 nm, all others have a b value of 1 24 nm.
机译:在快速凝固的Al67Cr25Cu18中发现十倍体准晶体在十倍方向上具有两个不同的周期性,分别为1.24 nm和3.72 nm。在800-950 C退火时,通过用两个连续的斐波那契数(0,1、1,2,3,5,8,13,...)的有理比例代替两个正交的无理数,出现了四个正交的近似值,在这些十边形准晶体中是准周期性的,双向的。 (1 / 1,1 / 1)近似值具有与Al3Mn大致相同的晶格参数,而(1 / 0,2 / 1)的近似晶格参数与T3-AlMnZn相同。 (1 / 0,2 / 1),(2 / 1,5 / 3)和(3 / 2,8 / 5)近似值形成了一系列近似值,这些近似值的a和c参数为1:2 3的比率。尽管(2 / 1,5 / 3)近似值的b参数为3 72 nm,但所有其他参数的b值均为1 24 nm。

著录项

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号