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@article{2297080,
author = {Kashani, Amir Hossein Navidi and Mraz, Stanislav and Holzapfel, Damian M and Hans, Marcus and Lofler, Lukas and Ondračka, Pavel and Primetzhofer, Daniel and Schneider, Jochen M},
article_location = {LAUSANNE},
doi = {http://dx.doi.org/10.1016/j.surfcoat.2022.128190},
keywords = {Coatings; Hightemperatureoxidation; TiAlN; TiAlB2},
issn = {0257-8972},
journal = {SURFACE & COATINGS TECHNOLOGY},
title = {Synthesis and oxidation behavior of Ti0.35Al0.65By (y=1.7-2.4) coatings},
volume = {442},
year = {2022}
}
TY - JOUR
ID - 2297080
AU - Kashani, Amir Hossein Navidi - Mraz, Stanislav - Holzapfel, Damian M - Hans, Marcus - Lofler, Lukas - Ondračka, Pavel - Primetzhofer, Daniel - Schneider, Jochen M
PY - 2022
TI - Synthesis and oxidation behavior of Ti0.35Al0.65By (y=1.7-2.4) coatings
JF - SURFACE & COATINGS TECHNOLOGY
VL - 442
PB - ELSEVIER SCIENCE SA
SN - 02578972
KW - Coatings
KW - Hightemperatureoxidation
KW - TiAlN
KW - TiAlB2
N2 - The effect of B concentration on phase formation and oxidation resistance of (Ti0.35Al0.65)By coatings with y = 1.7, 2.0, 2.4 was investigated. Elemental B targets in radio frequency mode and a compound Ti0.4Al0.6 target in direct current mode were sputtered. The B concentration was varied systematically by adjusting the applied power to the respective magnetrons, while keeping the power supplied to the magnetron with the Ti0.4Al0.6 target constant. Measured lattice parameters and elastic properties are consistent with ab initio predictions. The oxidation resistance at 700 degrees C in air for up to 8 h was compared to a cathodic arc evaporated (Ti0.37Al0.63)0.49N0.51 coating with an Al/Ti ratio of 1.69 +/- 0.20 which is very similar to 1.84 +/- 0.40 for the boride coatings. Scanning transmission electron microscopy imaging revealed oxide scale thicknesses of 39 +/- 7 and 101 +/- 25 nm for (Ti0.35Al0.65)B2.0 and (Ti0.37Al0.63)0.49N0.51 after 8 h, respectively. Hence, the close to stoichiometric diboride outperforms the nitride coating. This behavior can be understood based on composition and structure analysis of the oxide scales: While the protective layer on the diboride is primarily composed of Al and O, the porous oxide layer on the nitride coating contains Ti, Al and O.
ER -
KASHANI, Amir Hossein Navidi, Stanislav MRAZ, Damian M HOLZAPFEL, Marcus HANS, Lukas LOFLER, Pavel ONDRAČKA, Daniel PRIMETZHOFER and Jochen M SCHNEIDER. Synthesis and oxidation behavior of Ti0.35Al0.65By (y=1.7-2.4) coatings. \textit{SURFACE \&{}amp; COATINGS TECHNOLOGY}. LAUSANNE: ELSEVIER SCIENCE SA, 2022, vol.~442, 9 pp. ISSN~0257-8972. Available from: https://dx.doi.org/10.1016/j.surfcoat.2022.128190.
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