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Magnetron Sputtered Pt-based Coatings for Oxidation Protection of Titanium Aluminides

Fröhlich, Maik and Braun, Reinhold and Leyens, Christoph (2007) Magnetron Sputtered Pt-based Coatings for Oxidation Protection of Titanium Aluminides. Symposium on Vacuum based Science and Technology, 2007-09-04 - 2007-09-07, Greifswald (Deutschland).

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In the field of aerospace and automotive industry the development of light weight materials with resistance against high mechanical stresses as well as extreme environment 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 superalloys. 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 Pt-based coatings produced by magnetron sputtering. Three Pt containing systems with different aluminum contents - pure Pt, PtAl and PtAl<sub>2</sub> - were investigated aiming at the formation of a slow growing and protective Al<sub>2</sub>O<sub>3</sub> scale. Oxidation resistance of all coating systems was tested at 950°C up to 1000 1h-cycles. Investigations of microstructure evolution will be presented observed 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/48946/
Document Type:Conference or Workshop Item (Speech)
Title:Magnetron Sputtered Pt-based Coatings for Oxidation Protection of Titanium Aluminides
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Leyens, ChristophBrandenburgische Technische Universität Cottbus, Konrad-Wachsmann-Allee 1, 03046 CottbusUNSPECIFIED
Date:September 2007
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Hochtemperaturschutz, Oxidationsschutzschichten, TiAl
Event Title:Symposium on Vacuum based Science and Technology
Event Location:Greifswald (Deutschland)
Event Type:international Conference
Event Dates:2007-09-04 - 2007-09-07
Organizer:German Vacuum Society, Polish Vacuum Society, Swedish Vacuum Society
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:16 Nov 2007
Last Modified:27 Apr 2009 13:52

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