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Development of Magnetron Sputtered TiAl<sub>x</sub> Coatings for Optimised Oxidation Protection of Titanium Aluminides for High Temperature Applications

Fröhlich, Maik and Braun, Reinhold and Leyens, Christoph (2006) Development of Magnetron Sputtered TiAl<sub>x</sub> Coatings for Optimised Oxidation Protection of Titanium Aluminides for High Temperature Applications. PSE 2006, 2006-10-09 - 2006-15-09, Garmisch-Partenkirchen, Deutschland.

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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; however, as yet no coating system tested has proven sufficient performance for long-term use in automotive and aerospace industry. The paper is focused on the development of TiAl<sub>x</sub> coatings by means of magnetron sputter process. With various aluminum contents (x ≥ 2,33) a stable TiAl<sub>3</sub> phase on the substrate material should be formed intending the formation of a slow growing and protective Al<sub>2</sub>O<sub>3</sub> scale. The effect of different Al-contents on the high temperature behavior at 950°C up to 1500 1h-cycles will be presented 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/44524/
Document Type:Conference or Workshop Item (Speech)
Title:Development of Magnetron Sputtered TiAl<sub>x</sub> Coatings for Optimised Oxidation Protection of Titanium Aluminides for High Temperature Applications
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Fröhlich, MaikUNSPECIFIEDUNSPECIFIED
Braun, ReinholdUNSPECIFIEDUNSPECIFIED
Leyens, ChristophBrandenburgische Technische Universität Cottbus, Konrad-Wachsmann-Allee 1, 03046 CottbusUNSPECIFIED
Date:31 January 2006
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:TiAl, Oxidationschutzschichten
Event Title:PSE 2006
Event Location:Garmisch-Partenkirchen, Deutschland
Event Type:international Conference
Event Dates:2006-10-09 - 2006-15-09
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:30 Nov 2006
Last Modified:27 Apr 2009 13:02

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