Highly ordered 10H-type long-period stacking order phase in a Mg-Zn-Y ternary alloy
Highly ordered 10H-type long-period stacking order phase in a Mg-Zn-Y ternary alloy
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DOI：
10.1016/j.scriptamat.2014.01.013
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发表时间：
2014-05-01
影响因子：
6
通讯作者：
Kawamura, Yoshihito
中科院分区：
文献类型：
--
作者：
Yamasaki, Michiaki;Matsushita, Masafumi;Kawamura, Yoshihito
研究发现，在773K退火热处理后的镁合金中，形成了高度有序的10H型长周期堆积有序(LPSO)结构，其中Zn/Y原子的面内长程有序结构显著发展。目前的10H-LPSO相的有序度与Mg-Al-Gd合金相似，其结构特征是按有序/无序型金属间化合物多型体描述的。测得的成分为Mg77.2Zn9.7Y13.1，与10H-Mg23Zn3Y4(Mg76.7Zn10Y13.3)相的理想化学计量比完全一致。(C)2014 Acta Materialia Inc.由Elsevier Ltd.出版。保留所有权利。
A highly ordered long-period stacking order (LPSO) structure of 10H-type is found to form in Mg75Zn10Y15 (at.%) alloys annealed at 773 K, with a remarkably developed in-plane long-range order of Zn/Y atoms. The degree of order of the present 10H-LPSO Mg-Zn-Y phase is similar to that of the Mg-Al-Gd alloys, the structural characteristics of which are described according to order/disorder-type intermetallic polytypes. The measured composition Mg77.2Zn9.7Y13.1 appears to be precisely consistent with an ideal stoichiometry of the 10H-Mg23Zn3Y4 (Mg76.7Zn10Y13.3) phase. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.