A 12R long-period stacking-ordered structure in a Mg-Ni-Y alloy
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2018年第12期
论文作者：Cheng Liu Yuman Zhu Qun Luo Bin Liu Qian Li
文章页码：2235 - 2239
摘 要：A hitherto unreported long-period stacking-ordered（LPSO） phase, designated 12 R, was observed in a Mg80Ni5Y15（at.%） alloy. Microstructure was investigated by electron diffraction and high-angle annular dark-field scanning transmission electron microscopy. Results show that the 12 R has a trigonal lattice（a = b = 1.112 nm, c = 3.126 nm, α = β = 90°, and γ = 120°）. Unit cell of the 12 R is consisted of three ABCAtype building blocks and each building block contains dominant Ni6 Y8-type building clusters. A sound structural model is proposed based on relative positions of Ni6 Y8 clusters in neighboring building blocks.
Cheng Liu1，Yuman Zhu2，Qun Luo1，Bin Liu1，Qian Li1
1. State Key Laboratory of Advanced Special Steels,Shanghai Key Laboratory of Advanced Ferrometallurgy,School of Materials Science and Engineering,Shanghai Institute of Materials Genome,Materials Genome Institute,Shanghai University2. Department of Materials Science and Engineering,Monash University
摘 要：A hitherto unreported long-period stacking-ordered（LPSO） phase, designated 12 R, was observed in a Mg80Ni5Y15（at.%） alloy. Microstructure was investigated by electron diffraction and high-angle annular dark-field scanning transmission electron microscopy. Results show that the 12 R has a trigonal lattice（a = b = 1.112 nm, c = 3.126 nm, α = β = 90°, and γ = 120°）. Unit cell of the 12 R is consisted of three ABCAtype building blocks and each building block contains dominant Ni6 Y8-type building clusters. A sound structural model is proposed based on relative positions of Ni6 Y8 clusters in neighboring building blocks.
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