New polytypes of long-period stacking ordered structures in a near-equilibrium Mg97Zn1Y2 alloy

Q. Q. Jin; X. H. Shao; Xiaobing Hu; Z. Z. Peng; X. L. Ma

doi:10.1080/09500839.2017.1311426

New polytypes of long-period stacking ordered structures in a near-equilibrium Mg₉₇Zn₁Y₂ alloy

Q. Q. Jin, X. H. Shao^*, Xiaobing Hu, Z. Z. Peng, X. L. Ma

^*Corresponding author for this work

NUANCE - Atomic and Nanoscale Characterization Experimental Center

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

By atomic-scale high-angle annular dark-field scanning transmission electron microscopy, the long-period stacking ordered (LPSO) structures in a near-equilibrium Mg₉₇Zn₁Y₂ (at.%) alloy have been characterised. In addition to 18R and 14H, new polytypes of LPSO structures are analysed and determined as 60R, 78R, 26H, 96R, 38H, 40H, 108H and 246R. All of these LPSO structures feature AB′C′A building blocks with two Mg layers and three Mg layers sandwiched between them. The Bravais lattices and space groups of new polytypes of LPSO structures were easily determined via the newly introduced method. A structural relationship between the LPSOs is proposed.

Original language	English (US)
Pages (from-to)	180-187
Number of pages	8
Journal	Philosophical Magazine Letters
Volume	97
Issue number	5
DOIs	https://doi.org/10.1080/09500839.2017.1311426
State	Published - May 4 2017

Keywords

Magnesium alloys
electron diffraction
long-period stacking ordered (LPSO) structure
scanning transmission electron microscopy

ASJC Scopus subject areas

Condensed Matter Physics

Access to Document

10.1080/09500839.2017.1311426

Cite this

@article{47940c67938d43f4b7ff42a7596f673c,

title = "New polytypes of long-period stacking ordered structures in a near-equilibrium Mg97Zn1Y2 alloy",

abstract = "By atomic-scale high-angle annular dark-field scanning transmission electron microscopy, the long-period stacking ordered (LPSO) structures in a near-equilibrium Mg97Zn1Y2 (at.%) alloy have been characterised. In addition to 18R and 14H, new polytypes of LPSO structures are analysed and determined as 60R, 78R, 26H, 96R, 38H, 40H, 108H and 246R. All of these LPSO structures feature AB′C′A building blocks with two Mg layers and three Mg layers sandwiched between them. The Bravais lattices and space groups of new polytypes of LPSO structures were easily determined via the newly introduced method. A structural relationship between the LPSOs is proposed.",

keywords = "Magnesium alloys, electron diffraction, long-period stacking ordered (LPSO) structure, scanning transmission electron microscopy",

author = "Jin, {Q. Q.} and Shao, {X. H.} and Xiaobing Hu and Peng, {Z. Z.} and Ma, {X. L.}",

note = "Funding Information: This work was supported by the National Science Foundation of China [grant number 51301177]; the Innovation Fund of IMR [SCJJ-2013-PY-08], [2015-PY08]; the Youth Fund of SYNL fund [2015FP18]. We are also grateful to Prof. S. J. Zheng and Dr. Y. T. Zhou for fruitful discussion, Mr. B. Wu and Mr. L.X. Yang of this laboratory for their technical support on the Titan platform of the Titan3TM G2 60-300kV aberration-corrected scanning transmission electron microscope.",

year = "2017",

month = may,

day = "4",

doi = "10.1080/09500839.2017.1311426",

language = "English (US)",

volume = "97",

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journal = "Philosophical Magazine Letters",

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publisher = "Taylor and Francis Ltd.",

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T1 - New polytypes of long-period stacking ordered structures in a near-equilibrium Mg97Zn1Y2 alloy

AU - Jin, Q. Q.

AU - Shao, X. H.

AU - Hu, Xiaobing

AU - Peng, Z. Z.

AU - Ma, X. L.

N1 - Funding Information: This work was supported by the National Science Foundation of China [grant number 51301177]; the Innovation Fund of IMR [SCJJ-2013-PY-08], [2015-PY08]; the Youth Fund of SYNL fund [2015FP18]. We are also grateful to Prof. S. J. Zheng and Dr. Y. T. Zhou for fruitful discussion, Mr. B. Wu and Mr. L.X. Yang of this laboratory for their technical support on the Titan platform of the Titan3TM G2 60-300kV aberration-corrected scanning transmission electron microscope.

PY - 2017/5/4

Y1 - 2017/5/4

N2 - By atomic-scale high-angle annular dark-field scanning transmission electron microscopy, the long-period stacking ordered (LPSO) structures in a near-equilibrium Mg97Zn1Y2 (at.%) alloy have been characterised. In addition to 18R and 14H, new polytypes of LPSO structures are analysed and determined as 60R, 78R, 26H, 96R, 38H, 40H, 108H and 246R. All of these LPSO structures feature AB′C′A building blocks with two Mg layers and three Mg layers sandwiched between them. The Bravais lattices and space groups of new polytypes of LPSO structures were easily determined via the newly introduced method. A structural relationship between the LPSOs is proposed.

AB - By atomic-scale high-angle annular dark-field scanning transmission electron microscopy, the long-period stacking ordered (LPSO) structures in a near-equilibrium Mg97Zn1Y2 (at.%) alloy have been characterised. In addition to 18R and 14H, new polytypes of LPSO structures are analysed and determined as 60R, 78R, 26H, 96R, 38H, 40H, 108H and 246R. All of these LPSO structures feature AB′C′A building blocks with two Mg layers and three Mg layers sandwiched between them. The Bravais lattices and space groups of new polytypes of LPSO structures were easily determined via the newly introduced method. A structural relationship between the LPSOs is proposed.

KW - Magnesium alloys

KW - electron diffraction

KW - long-period stacking ordered (LPSO) structure

KW - scanning transmission electron microscopy

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