Oxidation behavior at 300–1000C of a (Mo,W)Si2-based composite containing boride
Artikel i vetenskaplig tidskrift, 2010
The oxidation behavior of a (Mo,W)Si2 composite with boride addition was examined at 300–1000C for
24 h in dry O2. The oxidation kinetics was studied using a thermobalance, and the oxide scales were
analyzed using a combination of electron microscopy (SEM/EDX, FIB, BIB) and XRD. Accelerated oxidation
was found to occur between 500C and 675C, with a peak mass gain at 625C. The rapid oxidation is
attributed to the vaporization of molybdenum oxide that leaves a porous and poorly protective silica
layer behind. At higher temperature (700–1000C) a protective scale forms, consisting of a dense SiO2/
B2O3 glass.
scanning
B. Oxidation
F. Electron microscopy
A. Molybdenum silicides
F. Diffraction
D. Microstructure
Författare
Linda Ingemarsson
Chalmers, Kemi- och bioteknik, Oorganisk miljökemi
Mats Halvarsson
Chalmers, Teknisk fysik, Mikroskopi och mikroanalys
Kristina M Hellström
Chalmers, Kemi- och bioteknik, Oorganisk miljökemi
Torbjörn Jonsson
Chalmers, Teknisk fysik, Mikroskopi och mikroanalys
Mats Sundberg
Kanthal AB
Lars-Gunnar Johansson
Chalmers, Kemi- och bioteknik, Oorganisk miljökemi
Jan-Erik Svensson
Chalmers, Kemi- och bioteknik, Oorganisk miljökemi
Intermetallics
0966-9795 (ISSN)
Vol. 18 1 77-86Ämneskategorier
Materialteknik
DOI
10.1016/j.intermet.2009.06.013