Al-rich Fe0.85Al0.15(1 0 0), (1 1 0) and (1 1 1) surface structures

Zongbei Dai; Natalia Alyabyeva; Patrizia Borghetti; Stéphane Chenot; Pascal David; Alexey Koltsov; Gilles Renaud; Jacques Jupille; Gregory Cabailh; Rémi Lazzari

doi:10.1016/j.apsusc.2020.145312

Al-rich Fe_0.85Al_0.15(1 0 0), (1 1 0) and (1 1 1) surface structures

Zongbei Dai
, Natalia Alyabyeva
, Patrizia Borghetti
, Stéphane Chenot
, Pascal David
, Alexey Koltsov
, Gilles Renaud
, Jacques Jupille
, Gregory Cabailh
, Rémi Lazzari

École Polytechnique

Sorbonne Université
ArcelorMittal
LTHE (UMR 5564 CNRS/IRD/Université de Grenoble)

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

6 Citations (Scopus)

Abstract

Based on previous photoemission findings, the influence of newly observed aluminum surface segregation at the low (1 1 0), (1 0 0) and (1 1 1) index surfaces of the A₂ body-centered Fe_0.85Al_0.15 random alloy is explored. Scanning Tunneling Microscopy, Low-Energy Electron Diffraction and Grazing-Incidence X-ray Diffraction are combined to explore surface structures and topographies. The formation of a surface composition close to the B₂ Fe_0.5Al_0.5 occurs with the appearance of (i) a long-range pseudo-hexagonal incommensurate superstructure with a periodicity of ~18 Å on the (1 1 0) surface, (ii) a (1×1) termination on the (1 0 0) surface and (iii) a intense vicinal faceting of the (1 1 1) surface in the form of triangular pits.

Original language	English
Article number	145312
Journal	Applied Surface Science
Volume	509
DOIs	https://doi.org/10.1016/j.apsusc.2020.145312
Publication status	Published - 15 Apr 2020

Keywords

Body-centered cubic alloy
FeAl
Segregation

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10.1016/j.apsusc.2020.145312

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@article{4b3ecf7b64fb411cbab85d65b2cb57aa,

title = "Al-rich Fe0.85Al0.15(1 0 0), (1 1 0) and (1 1 1) surface structures",

abstract = "Based on previous photoemission findings, the influence of newly observed aluminum surface segregation at the low (1 1 0), (1 0 0) and (1 1 1) index surfaces of the A2 body-centered Fe0.85Al0.15 random alloy is explored. Scanning Tunneling Microscopy, Low-Energy Electron Diffraction and Grazing-Incidence X-ray Diffraction are combined to explore surface structures and topographies. The formation of a surface composition close to the B2 Fe0.5Al0.5 occurs with the appearance of (i) a long-range pseudo-hexagonal incommensurate superstructure with a periodicity of \textasciitilde{}18 {\AA} on the (1 1 0) surface, (ii) a (1{\texttimes}1) termination on the (1 0 0) surface and (iii) a intense vicinal faceting of the (1 1 1) surface in the form of triangular pits.",

keywords = "Body-centered cubic alloy, FeAl, Segregation",

author = "Zongbei Dai and Natalia Alyabyeva and Patrizia Borghetti and St{\'e}phane Chenot and Pascal David and Alexey Koltsov and Gilles Renaud and Jacques Jupille and Gregory Cabailh and R{\'e}mi Lazzari",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2020",

month = apr,

day = "15",

doi = "10.1016/j.apsusc.2020.145312",

language = "English",

volume = "509",

journal = "Applied Surface Science",

issn = "0169-4332",

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TY - JOUR

T1 - Al-rich Fe0.85Al0.15(1 0 0), (1 1 0) and (1 1 1) surface structures

AU - Dai, Zongbei

AU - Alyabyeva, Natalia

AU - Borghetti, Patrizia

AU - Chenot, Stéphane

AU - David, Pascal

AU - Koltsov, Alexey

AU - Renaud, Gilles

AU - Jupille, Jacques

AU - Cabailh, Gregory

AU - Lazzari, Rémi

PY - 2020/4/15

Y1 - 2020/4/15

N2 - Based on previous photoemission findings, the influence of newly observed aluminum surface segregation at the low (1 1 0), (1 0 0) and (1 1 1) index surfaces of the A2 body-centered Fe0.85Al0.15 random alloy is explored. Scanning Tunneling Microscopy, Low-Energy Electron Diffraction and Grazing-Incidence X-ray Diffraction are combined to explore surface structures and topographies. The formation of a surface composition close to the B2 Fe0.5Al0.5 occurs with the appearance of (i) a long-range pseudo-hexagonal incommensurate superstructure with a periodicity of ~18 Å on the (1 1 0) surface, (ii) a (1×1) termination on the (1 0 0) surface and (iii) a intense vicinal faceting of the (1 1 1) surface in the form of triangular pits.

AB - Based on previous photoemission findings, the influence of newly observed aluminum surface segregation at the low (1 1 0), (1 0 0) and (1 1 1) index surfaces of the A2 body-centered Fe0.85Al0.15 random alloy is explored. Scanning Tunneling Microscopy, Low-Energy Electron Diffraction and Grazing-Incidence X-ray Diffraction are combined to explore surface structures and topographies. The formation of a surface composition close to the B2 Fe0.5Al0.5 occurs with the appearance of (i) a long-range pseudo-hexagonal incommensurate superstructure with a periodicity of ~18 Å on the (1 1 0) surface, (ii) a (1×1) termination on the (1 0 0) surface and (iii) a intense vicinal faceting of the (1 1 1) surface in the form of triangular pits.

KW - Body-centered cubic alloy

KW - FeAl

KW - Segregation

UR - https://www.scopus.com/pages/publications/85077807491

U2 - 10.1016/j.apsusc.2020.145312

DO - 10.1016/j.apsusc.2020.145312

M3 - Article

AN - SCOPUS:85077807491

SN - 0169-4332

VL - 509

JO - Applied Surface Science

JF - Applied Surface Science

M1 - 145312

ER -

Al-rich Fe_0.85Al_0.15(1 0 0), (1 1 0) and (1 1 1) surface structures

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Keywords

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