Oxidation behaviour of a fluorinated beta-stabilized γ-TiAl alloy with thermal barrier coatings in H2O- and SO2-containing atmospheres
Source abstract
Abstract
Abstract The oxidation behaviour of a novel thermal barrier coating (TBC) system on a β-stabilized TiAl alloy was investigated at 900 °C in air containing water vapour and sulphur dioxide. This recently developed system consists of a 7 wt.% yttria partially stabilized zirconia topcoat deposited on fluorine-treated and pre-oxidized TNM-B1 substrate material. During thermal cycling at 900 °C in atmospheres containing either 10 vol.% H2O or 0.5 vol.% SO2, no spallation of the TBCs was observed for exposure periods exceeding 1000 cycles of 1 h dwell time. Fluorinated samples without TBCs showed similar oxidation behaviour, whereas the untreated TNM-B1 alloy revealed significant oxidation.
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Research context
OpenAlex topics: Intermetallics and Advanced Alloy Properties · High-Temperature Coating Behaviors · Advanced ceramic materials synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (24)
Show source-provided references
1. Appel · 2003 · 89
2. Gamma titanium aluminide alloys – an assessment within the competition of aerospace structural materials10.1016/S0921-5093(98)01158-7 ↗
3. Fundamentals of TiAl oxidation – a critical review10.1002/maco.19950460503 ↗
4. The halogen effect in the oxidation of intermetallic titanium aluminides10.1016/S0010-938X(01)00062-2 ↗
5. Thermodynamic considerations of the beneficial effect of halogens on the oxidation resistance of TiAl-based alloys10.1016/S0966-9795(03)00003-7 ↗
6. Improvement of the oxidation behaviour of TiAl-alloys by treatment with halogens10.1016/j.intermet.2005.11.032 ↗
7. Improving the oxidation resistance of gamma-titanium aluminides by halogen treatment10.1002/maco.200804132 ↗
8. Optimizing thermally grown oxide for thermal barrier coatings on TiAl components via fluorine treatment10.1007/s11837-010-0015-9 ↗
9. Thermal barrier coatings on γ-TiAl protected by the halogen effect10.1016/j.surfcoat.2012.09.021 ↗
10. Design of novel β-solidifying TiAl alloys with adjustable β/B2-phase fraction and excellent hot-workability10.1002/adem.200800164 ↗
11. Thermal barrier coatings for gas-turbine engine applications10.1126/science.1068609 ↗
12. Tesmer · 1995
13. Zschau · 2012 · 409
14. Mechanism of isothermal oxidation of the intermetallic TiAl and of TiAl alloys10.1007/BF00665663 ↗
15. Influence of water vapour on the oxidation behaviour of titanium aluminides10.1016/S0966-9795(01)00104-2 ↗
16. M. Schütze, S. Friedle, in: I. Baker, M. Heilmaier, S. Kumar, K. Yoshimi (Eds.), MRS Symp. Proc. 1516 Cambridge University Press, 2013, pp. 77–88.
17. High temperature corrosion of TiAl – 2–5at.%X (X=Ag, Cr, Nb) alloys in SO2 and H2S–H2 atmospheres10.4028/www.scientific.net/MSF.461-464.497 ↗
18. A. Donchev, P. Masset, M. Schütze, Mater. Res. Soc. Symp. Proc. 1128 (2009) 159–164 (Warrendale).
19. High temperature corrosion of Ti–46Al–7Nb–0.7Cr–0.1Si–0. 2Ni intermetallics-based alloys in N2–O2–SO2 environments
20. Oxidation protection of γ-TiAl-based alloys – A review10.1016/j.intermet.2014.08.002 ↗
21. The significance of sub-surface depletion layer composition for the oxidation behaviour of gamma-titanium aluminides10.1016/0956-716X(95)00155-O ↗
22. Formation of Z-Ti50Al30O20 in the sub-oxide zones of gamma-TiAl-based alloys during oxidation at 1000°C10.1016/S1359-6454(99)00169-X ↗
23. High temperature oxidation resistance of fluorine-treated TiAl alloys: chemical vs. ion beam fluorination techniques10.1016/j.nimb.2010.08.001 ↗
24. Investigation of the fluorine microalloying effect in the oxidation of TiAl at 900°C in air10.1023/A:1023030302118 ↗