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 journalArticleScientificpeer-review

1 Citation (Scopus)
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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.

Original languageEnglish
Article number110884
Number of pages13
JournalCorrosion Science
Publication statusPublished - 2023


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


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