Influence of Yttrium Doping on the Oxidation of Mo(Si,Al)(2) in Air at 1500 degrees C
Artikel i vetenskaplig tidskrift, 2022

Mo(Si,Al)(2) with different yttrium (Y) additions (up to 2 at.%) was synthesised by dry powder mixing followed by compaction and sintering. In as-sintered materials, Y was present as yttrium aluminium garnet. The materials were exposed in air at 1500 degrees C for up to 250 h to study the effect of Y on oxidation behaviour. The oxides formed were investigated using scanning electron microscopy (SEM)-based techniques and X-ray diffraction. While the Y-free Mo(Si,Al)(2) formed a scale consisting of Al2O3 and a small amount of mullite, the Y-containing samples formed oxides containing both yttrium silicate and larger fractions of mullite, in addition to Al2O3. Oxidation rate, scale spallation, as well as the evaporation of Mo, all increased with Y addition.

Mo(Si

Reactive elements

Spallation

Oxidation

Al)(2)

Författare

Aina Edgren

Chalmers, Fysik, Mikrostrukturfysik

Lars-Gunnar Johansson

Chalmers, Kemi och kemiteknik, Energi och material

Erik Strom

Kanthal AB

Magnus Hörnqvist Colliander

Chalmers, Fysik, Mikrostrukturfysik

Oxidation of Metals

0030-770X (ISSN) 1573-4889 (eISSN)

Vol. In Press

Ämneskategorier

Oorganisk kemi

Keramteknik

Materialkemi

Infrastruktur

Chalmers materialanalyslaboratorium

DOI

10.1007/s11085-022-10130-6

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Senast uppdaterat

2023-04-11