Oxidation behavior of a Mo(Si,Al)2 composite at 900–1600 C in dry air
Journal article, 2013
The oxidation of a Mo(Si,Al)2-based composite
is investigated in the temperature range 900–1600 C in
dry air. Exposure time was 72 h. Comparisons are made
with the oxidation behavior of a conventional MoSi2-based
material. Cross-sections are examined with scanning electron
microscopy and transmission electron microscopy; the
phase composition is analyzed by X-ray diffraction and
convergent beam electron diffraction. The material forms a
continuous external a-alumina scale throughout the temperature range. Below the scale, there is a continuous
Mo5(Si,Al)3 layer that overlies Mo(Si,Al)2 in the bulk. The
Mo(Si,Al)2 phase immediately beneath the Mo5(Si,Al)3
layer is depleted in Al. No indications of MoO3 volatilization could be found for the Mo(Si,Al)2 material
high temperature
molybdenum disilicide
oxidation
Author
Linda Ingemarsson
Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry
Kristina M Hellström
Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry
Sead Canovic
Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry
Torbjörn Jonsson
Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry
Mats Halvarsson
Chalmers, Applied Physics, Microscopy and Microanalysis
Chalmers, Applied Physics, Materials Microstructure
Lars-Gunnar Johansson
Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry
Jan-Erik Svensson
Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry
Journal of Materials Science
0022-2461 (ISSN) 1573-4803 (eISSN)
Vol. 48 4 1511-1523Subject Categories
Inorganic Chemistry
Materials Engineering
Driving Forces
Sustainable development
Areas of Advance
Energy
Materials Science
Roots
Basic sciences
DOI
10.1007/s10853-012-6906-0