Improvement of the resistance of titanium aluminides to environmental embrittlement
- Masset, P.J.
- Bleicher, F.
- Bortolotto, L.
- Geiger, G.
- Kolitsch, A.
- Langlade, C.
- Paul, J.
- Pelic, B.
- Pyczak, F.
- Rafaja, D.
- Schumacher, P.
- Schütze, M.
- Wolf, G.
- Yankov, R.A.
DOIAbstract
Aluminum enriched coatings have been developed for titanium aluminide alloys. It has been shown that Metal Organic Chemical Vapor Deposition (MO-CVD) and Physical Vapor Deposition (PVD) processes combined with fluorination of the coating enables to reduce significantly the embrittlement of TiAl alloys through oxidation. Even after oxidation at 900 °C for 100h, the coatings exhibit suitable adhesion and 90 % of the fracture toughness and ductility of the alloy are maintained
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