Oxidation behavior of a Mo(Si,Al)2 composite at 900–1600 C in dry air
Journal article, 2012

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

molybdenum disilicide

high temperature

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 1511-1523

Subject 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

More information

Created

10/8/2017