Characterisation of Li in the surface film of a corrosion resistant Mg-Li(-Al-Y-Zr) alloy

Y. Yan; Y. Qiu; O. Gharbi; N. Birbilis; P. N.H. Nakashima

doi:10.1016/j.apsusc.2019.07.167

Characterisation of Li in the surface film of a corrosion resistant Mg-Li(-Al-Y-Zr) alloy

Y. Yan, Y. Qiu, O. Gharbi, N. Birbilis^*, P. N.H. Nakashima

^*Corresponding author for this work

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

42 Citations (Scopus)

Abstract

The surface film formed upon Mg-Li(-Al-Y-Zr) following aqueous immersion and air-exposure was investigated. This alloy (which contains 30.3 at. % Li) possesses a body-centred cubic (bcc) crystal structure and has been reported as being corrosion resistant. It was determined that the principal components of the surface film were Li₂CO₃ and Mg(OH)₂ as characterised by grazing incidence X-ray diffraction (GIXRD). Hexagonal close-packed (hcp) grains near the alloy surface were detected by GIXRD and selected area electron diffraction (SAED). The spatial distribution of Li and Mg in the surface film was characterised by electron energy loss spectroscopy (EELS) and the distribution of other major elements in the alloy was characterised by scanning transmission electron microscopy (STEM) and energy dispersive X-ray spectroscopy (EDXS). It was observed that Li was distributed throughout the alloy surface film and with an elevated concentration in the so-called outer layer.

Original language	English
Pages (from-to)	1066-1071
Number of pages	6
Journal	Applied Surface Science
Volume	494
DOIs	https://doi.org/10.1016/j.apsusc.2019.07.167
Publication status	Published - 15 Nov 2019

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title = "Characterisation of Li in the surface film of a corrosion resistant Mg-Li(-Al-Y-Zr) alloy",

abstract = "The surface film formed upon Mg-Li(-Al-Y-Zr) following aqueous immersion and air-exposure was investigated. This alloy (which contains 30.3 at. % Li) possesses a body-centred cubic (bcc) crystal structure and has been reported as being corrosion resistant. It was determined that the principal components of the surface film were Li2CO3 and Mg(OH)2 as characterised by grazing incidence X-ray diffraction (GIXRD). Hexagonal close-packed (hcp) grains near the alloy surface were detected by GIXRD and selected area electron diffraction (SAED). The spatial distribution of Li and Mg in the surface film was characterised by electron energy loss spectroscopy (EELS) and the distribution of other major elements in the alloy was characterised by scanning transmission electron microscopy (STEM) and energy dispersive X-ray spectroscopy (EDXS). It was observed that Li was distributed throughout the alloy surface film and with an elevated concentration in the so-called outer layer.",

keywords = "EELS, GIXRD, Lithium, Mg-alloy, TEM",

author = "Y. Yan and Y. Qiu and O. Gharbi and N. Birbilis and Nakashima, {P. N.H.}",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

year = "2019",

month = nov,

day = "15",

doi = "10.1016/j.apsusc.2019.07.167",

language = "English",

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T1 - Characterisation of Li in the surface film of a corrosion resistant Mg-Li(-Al-Y-Zr) alloy

AU - Yan, Y.

AU - Qiu, Y.

AU - Gharbi, O.

AU - Birbilis, N.

AU - Nakashima, P. N.H.

PY - 2019/11/15

Y1 - 2019/11/15

N2 - The surface film formed upon Mg-Li(-Al-Y-Zr) following aqueous immersion and air-exposure was investigated. This alloy (which contains 30.3 at. % Li) possesses a body-centred cubic (bcc) crystal structure and has been reported as being corrosion resistant. It was determined that the principal components of the surface film were Li2CO3 and Mg(OH)2 as characterised by grazing incidence X-ray diffraction (GIXRD). Hexagonal close-packed (hcp) grains near the alloy surface were detected by GIXRD and selected area electron diffraction (SAED). The spatial distribution of Li and Mg in the surface film was characterised by electron energy loss spectroscopy (EELS) and the distribution of other major elements in the alloy was characterised by scanning transmission electron microscopy (STEM) and energy dispersive X-ray spectroscopy (EDXS). It was observed that Li was distributed throughout the alloy surface film and with an elevated concentration in the so-called outer layer.

AB - The surface film formed upon Mg-Li(-Al-Y-Zr) following aqueous immersion and air-exposure was investigated. This alloy (which contains 30.3 at. % Li) possesses a body-centred cubic (bcc) crystal structure and has been reported as being corrosion resistant. It was determined that the principal components of the surface film were Li2CO3 and Mg(OH)2 as characterised by grazing incidence X-ray diffraction (GIXRD). Hexagonal close-packed (hcp) grains near the alloy surface were detected by GIXRD and selected area electron diffraction (SAED). The spatial distribution of Li and Mg in the surface film was characterised by electron energy loss spectroscopy (EELS) and the distribution of other major elements in the alloy was characterised by scanning transmission electron microscopy (STEM) and energy dispersive X-ray spectroscopy (EDXS). It was observed that Li was distributed throughout the alloy surface film and with an elevated concentration in the so-called outer layer.

KW - EELS

KW - GIXRD

KW - Lithium

KW - Mg-alloy

KW - TEM

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U2 - 10.1016/j.apsusc.2019.07.167

DO - 10.1016/j.apsusc.2019.07.167

M3 - Article

SN - 0169-4332

VL - 494

SP - 1066

EP - 1071

JO - Applied Surface Science

JF - Applied Surface Science

ER -

Characterisation of Li in the surface film of a corrosion resistant Mg-Li(-Al-Y-Zr) alloy

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