Oxidation of Ti2AlC bulk and spray deposited coatings
Journal article, 2010
The oxidation behaviour of Ti2AlC bulk and high velocity oxy-fuel spray deposited coatings has been investigated for temperatures up to 1200 degrees C. X-ray diffraction and electron microscopy show that bulk Ti2AlC forms a continuous layer of alpha-Al2O3 below a layer of TiO2 at temperatures as low as 700 degrees C. Oxidation of the Ti2AlC coatings is more complex, and also involves the phases Ti3AlC2, TiC, and TixAly, formed during the spraying process. alpha-Al2O3 is observed, however, it is unevenly distributed deep into the material, and does not form a continuous layer essential for good oxidation resistance.
ceramics
alumina
XRD
high-temperature
Ceramic
Aluminium
alloys
films
Titanium
SEM
behavior
m(n+1)ax(n) phases
Oxidation
air
Author
Marie Sonestedt
Chalmers, Applied Physics, Microscopy and Microanalysis
J. Frodelius
Linköping University
M. Sundberg
Kanthal AB
L. Hultman
Linköping University
Krystyna Marta Stiller
Chalmers, Applied Physics, Microscopy and Microanalysis
Corrosion Science
0010-938X (ISSN)
Vol. 52 12 3955-3961Subject Categories
Materials Engineering
DOI
10.1016/j.corsci.2010.08.004