Long-period stacking ordered structure in Mg-Y-Co-Ni alloy

被引：0

作者：

Oishi, Junnosuke ^{[1
]}

Okuda, Hiroshi ^{[1
]}

Yamasaki, Michiaki ^{[2
]}

Nishimoto, Soya ^{[2
]}

Kawamura, Yoshihito ^{[2
]}

Ohta, Noboru ^{[3
]}

Niwa, Yasuhiro ^{[4
]}

机构：

[1] Kyoto Univ, Dept Mat Sci & Engn, Sakyo ku, Yoshida, Kyoto 6068501, Japan

[2] Kumamoto Univ, Magnesium Res Ctr, Kurokami, Kumamoto 8608555, Japan

[3] Japan Synchrotron Radiat Res Inst, Res & Utilizat Div, Sayo, Hyogo 6795198, Japan

[4] High Energy Accelerator Res Org KEK, Photon Factory, Tsukuba, Ibaraki 3050801, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2025年 / 1022卷

关键词：

Long-period stacking ordered (LPSO) structure; Magnesium alloy; Microstructure; Clustering; Small-angle scattering; Extended X-ray absorption fine structure; Ab initio calculations; THERMODYNAMIC STABILITY; ZN-RE; PHASE; STRENGTH; MICROSTRUCTURE; POLYTYPES; CRYSTAL;

D O I：

10.1016/j.jallcom.2025.179780

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Amorphous samples of Mg84Y9Co2Ni3 (at%) were prepared and subjected to in-situ small-angle X-ray scattering (SAXS) and wide-angle X-ray diffraction (WAXD) measurements during annealing, followed by extended X-ray absorption fine structure (EXAFS) experiments. The SAXS and WAXD profiles indicated the formation of the 18Rtype long-period stacking ordered (LPSO) structure after heat treatment at 673 K. EXAFS spectra suggested the presence of both Co and Ni atoms within the L12-type solute clusters. Ab initio calculations for the quaternary LPSO phase were performed, and the results indicated that the mixing of Co and Ni in a single L12-type cluster stabilizes the 18R-type LPSO phase. Furthermore, the relaxed cluster structure exhibited dimensions consistent with those observed in the EXAFS measurements.

引用

页数：7

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