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

Journal Article (2023)
Author(s)

Z. Ding (TU Delft - Team Marcel Hermans)

J.C. Brouwer (TU Delft - Team Marcel Hermans)

C Kwakernaak (TU Delft - Team Maria Santofimia Navarro)

M.J.M. Hermans (TU Delft - Team Marcel Hermans)

Vera Vera (TU Delft - Team Vera Popovich)

Willem J. Quadakkers (Forschungszentrum Jülich)

W.G. Sloof (TU Delft - Team Kevin Rossi)

Research Group
Team Marcel Hermans
Copyright
© 2023 Z. Ding, J.C. Brouwer, C. Kwakernaak, M.J.M. Hermans, V. Popovich, Willem J. Quadakkers, W.G. Sloof
DOI related publication
https://doi.org/10.1016/j.corsci.2022.110884
More Info
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Publication Year
2023
Language
English
Copyright
© 2023 Z. Ding, J.C. Brouwer, C. Kwakernaak, M.J.M. Hermans, V. Popovich, Willem J. Quadakkers, W.G. Sloof
Research Group
Team Marcel Hermans
Volume number
211
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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.