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Investigations on the oxidation behaviour of MAX-phase based Ti<sub>2</sub>AlC coatings on γ-TiAl

Fröhlich, Maik and Leyens, Christoph (2008) Investigations on the oxidation behaviour of MAX-phase based Ti<sub>2</sub>AlC coatings on γ-TiAl. 11th International Conference on Plasma Surface Engineering (PSE), 2008-09-15 - 2009-09-19, Garmisch-Partenkirchen.

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Abstract

In the field of aerospace and automotive industry the development of light materials with resistance against high mechanical stresses is a main focus especially for economic and ecological reasons. With much lower density and excellent mechanical properties γ-TiAl alloys are promising candidates to replace the heavy steels and Ni-based super alloys. Protective coatings are necessary to exploit the full potential of gamma titanium aluminides at temperatures higher than 750°C with regard to a much lower oxidation rate. In this study the oxidation resistant and MAX-phase based material Ti<sub>2</sub>AlC was investigated as coating material on γ-TiAl deposited by magnetron sputtering. The phase formation was enhanced after the deposition process by heat treatment under high vacuum conditions. This phase should intend the formation of a slow growing and protective Al<sub>2</sub>O<sub>3</sub> scale when exposed to air at 950°C. The results of that test will be presented in relation to a non-pre-treated coating highlighting microstructure features by means of SEM and EDS analysis after exposure with regard to oxidation kinetics and lifetimes of the coating systems.

Item URL in elib:https://elib.dlr.de/56384/
Document Type:Conference or Workshop Item (Speech)
Title:Investigations on the oxidation behaviour of MAX-phase based Ti<sub>2</sub>AlC coatings on γ-TiAl
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Fröhlich, MaikUNSPECIFIEDUNSPECIFIED
Leyens, ChristophBrandenburgische Technische Universität Cottbus, Konrad-Wachsmann-Allee, 03046 CottbusUNSPECIFIED
Date:2008
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:TiAl, MAX-Phase, Oxidationsschutzschichten
Event Title:11th International Conference on Plasma Surface Engineering (PSE)
Event Location:Garmisch-Partenkirchen
Event Type:international Conference
Event Dates:2008-09-15 - 2009-09-19
Organizer:European Joint Committee on Plasma and Ion Surface Engineering
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Propulsion Systems (old)
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Turbine Technologies (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > High Temperature and Functional Coatings
Deposited By: Fröhlich, Maik
Deposited On:28 Nov 2008
Last Modified:27 Apr 2009 15:32

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