Selective oxidation of aluminium in Mo(Al,Si)2

Zhaoying Ding; Johannes C. Brouwer; Cees Kwakernaak; Marcel J.M. Hermans; Vera Popovich; Willem J. Quadakkers; Willem G. Sloof

doi:10.1016/j.corsci.2022.110884

Selective oxidation of aluminium in Mo(Al,Si)₂

Zhaoying Ding, Johannes C. Brouwer, Cees Kwakernaak, Marcel J.M. Hermans, Vera Popovich, Willem J. Quadakkers, Willem G. Sloof^*

^*Corresponding author for this work

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

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Abstract

Mo(Al_xSi_1-x)₂ alloy with x in the range of 0.35–0.65 were prepared by a one-step spark plasma sintering. To study the exclusive formation of an α-Al₂O₃ scale, oxidation experiments were conducted in low and high oxygen partial pressure ambient at 1373 K; viz.: 10⁻¹⁴ and 0.21 atm. The oxidation kinetics follows a parabolic rate law after a transient period. A counter-diffusion process of O and Al along grain boundaries of Al₂O₃ scale is responsible for the equiaxed and columnar grain growth based on a two-layered microstructure. The formation of a dense equiaxed α-Al₂O₃ layer contributes to excellent oxidation resistance.

Original language	English
Article number	110884
Number of pages	13
Journal	Corrosion Science
Volume	211
DOIs	https://doi.org/10.1016/j.corsci.2022.110884
Publication status	Published - 2023

Keywords

Alumina scale growth
Diffusion
Mo(Al,Si)2
Oxidation
Phase transformation

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10.1016/j.corsci.2022.110884

1-s2.0-S0010938X22008022-mainFinal published version, 11.6 MBLicence: CC BY

Cite this

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title = "Selective oxidation of aluminium in Mo(Al,Si)2",

abstract = "Mo(AlxSi1-x)2 alloy with x in the range of 0.35–0.65 were prepared by a one-step spark plasma sintering. To study the exclusive formation of an α-Al2O3 scale, oxidation experiments were conducted in low and high oxygen partial pressure ambient at 1373 K; viz.: 10−14 and 0.21 atm. The oxidation kinetics follows a parabolic rate law after a transient period. A counter-diffusion process of O and Al along grain boundaries of Al2O3 scale is responsible for the equiaxed and columnar grain growth based on a two-layered microstructure. The formation of a dense equiaxed α-Al2O3 layer contributes to excellent oxidation resistance.",

keywords = "Alumina scale growth, Diffusion, Mo(Al,Si)2, Oxidation, Phase transformation",

author = "Zhaoying Ding and Brouwer, {Johannes C.} and Cees Kwakernaak and Hermans, {Marcel J.M.} and Vera Popovich and Quadakkers, {Willem J.} and Sloof, {Willem G.}",

year = "2023",

doi = "10.1016/j.corsci.2022.110884",

language = "English",

volume = "211",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier",

}

TY - JOUR

T1 - Selective oxidation of aluminium in Mo(Al,Si)2

AU - Ding, Zhaoying

AU - Brouwer, Johannes C.

AU - Kwakernaak, Cees

AU - Hermans, Marcel J.M.

AU - Popovich, Vera

AU - Quadakkers, Willem J.

AU - Sloof, Willem G.

PY - 2023

Y1 - 2023

N2 - Mo(AlxSi1-x)2 alloy with x in the range of 0.35–0.65 were prepared by a one-step spark plasma sintering. To study the exclusive formation of an α-Al2O3 scale, oxidation experiments were conducted in low and high oxygen partial pressure ambient at 1373 K; viz.: 10−14 and 0.21 atm. The oxidation kinetics follows a parabolic rate law after a transient period. A counter-diffusion process of O and Al along grain boundaries of Al2O3 scale is responsible for the equiaxed and columnar grain growth based on a two-layered microstructure. The formation of a dense equiaxed α-Al2O3 layer contributes to excellent oxidation resistance.

AB - Mo(AlxSi1-x)2 alloy with x in the range of 0.35–0.65 were prepared by a one-step spark plasma sintering. To study the exclusive formation of an α-Al2O3 scale, oxidation experiments were conducted in low and high oxygen partial pressure ambient at 1373 K; viz.: 10−14 and 0.21 atm. The oxidation kinetics follows a parabolic rate law after a transient period. A counter-diffusion process of O and Al along grain boundaries of Al2O3 scale is responsible for the equiaxed and columnar grain growth based on a two-layered microstructure. The formation of a dense equiaxed α-Al2O3 layer contributes to excellent oxidation resistance.

KW - Alumina scale growth

KW - Diffusion

KW - Mo(Al,Si)2

KW - Oxidation

KW - Phase transformation

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U2 - 10.1016/j.corsci.2022.110884

DO - 10.1016/j.corsci.2022.110884

M3 - Article

AN - SCOPUS:85143126509

SN - 0010-938X

VL - 211

JO - Corrosion Science

JF - Corrosion Science

M1 - 110884

ER -

Selective oxidation of aluminium in Mo(Al,Si)₂

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