Crystallographic orientations quasicrystalline phase growing on and interfaces of icosahedral cubic W phase in Mg-Zn-Y alloys
Crystallographic orientations quasicrystalline phase growing on and interfaces of icosahedral cubic W phase in Mg-Zn-Y alloys
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DOI：
10.1016/j.msea.2005.02.036
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发表时间：
2005-04-25
期刊：
影响因子：
6.4
通讯作者：
Tsai, AP
中科院分区：
文献类型：
--
作者：
Singh, A;Watanabe, M;Tsai, AP
研究了 Mg97Zn2.5Y0.5 合金中 α-Mg 基体中 W 立方相上二十面体准晶相的形成。确定W相与基体的取向关系为[001]w竖条竖条[100](Mg)、(001)(w)竖条竖条(001)(Mg)，相当于Burgers取向关系。二十面体相与W相形成弯曲界面，但与基体在五重和二重平面上形成平面界面。二十面体相显示出其与W相的独特取向关系，这导致与基体存在两种取向关系WOR1和WOR2。 WOR1 是基体中二十面体相析出物的取向关系 OR1 的轻微偏差。在 WOR2 中，五重轴之一沿六边形轴出现。这里描述了所得的形态和界面结构。结果表明，WOR1 和 WOR2 通过二十面体相的孪生相互关联。 (c) 2005 Elsevier B.V. 保留所有权利。
Formation of icosahedral quasicrystalline phase on the W cubic phase in alpha-Mg matrix has been studied in a Mg97Zn2.5Y0.5 alloy. The orientation relationship of the W phase with the matrix is determined to be [001]w vertical bar vertical bar[100](Mg), (001)(w)vertical bar vertical bar(001)(Mg), equivalent to Burgers orientation relationship. The icosahedral phase forms curved interfaces with the W phase, but planar interfaces on five-fold and two-fold planes with the matrix. The icosahedral phase shows its unique orientation relationship to the W phase, which results in two orientation relationships WOR1 and WOR2 with the matrix. WOR1 is a slight deviation of the orientation relation, OR1, of icosahedral phase precipitates in the matrix. In WOR2, one of the five-fold axes occur along the hexagonal axis. The resulting morphology and the interface structures are described here. It is shown that WOR1 and WOR2 are related to each other by twinning of the icosahedral phase. (c) 2005 Elsevier B.V. All rights reserved.