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Ti-Al-Cr-X Coatings for High Temperature Oxidation Protection of Gamma Titanium Aluminides for Elevated Temperatures

Fröhlich, Maik and Braun, Reinhold and Leyens, Christoph (2008) Ti-Al-Cr-X Coatings for High Temperature Oxidation Protection of Gamma Titanium Aluminides for Elevated Temperatures. In: TMS 2008, pp. 333-340. The Minerals, Metals & Materials Society. TMS Annual Meeting, 2008-03-09 - 2008-03-13, New Orleans.

Full text not available from this repository.

Abstract

To extend the oxidation resistance of gamma titanium aluminides for applications above 750°C the formation of non-protective titanium oxide has to be prevented. The primary objective to improve the resistance of titanium aluminides against oxidation is the use of alumina forming coatings. The paper is focussed on the development of oxidation resistant metallic coatings on the basis of Ti-Al-Cr. Ti-Al-Cr and Ti-Al-Cr-X coatings with X=Ag,Hf,Y,Si were produced by magnetron sputtering techniques. The coated specimens were examined under cyclic conditions at 900°C and 950°C up to 1000 cycles, respectively. All coatings formed a thin alumina layer on top providing a diffusion barrier for oxygen at the beginning. But internal diffusion between substrate and coating led to a depletion of Laves phase which promotes the formation of alumina. The effect of cross diffusion between coating and substrate for the various coating chemistries will be discussed on the basis of post-oxidation SEM/EDX and oxidation kinetics analysis.

Item URL in elib:https://elib.dlr.de/56383/
Document Type:Conference or Workshop Item (Speech)
Title:Ti-Al-Cr-X Coatings for High Temperature Oxidation Protection of Gamma Titanium Aluminides for Elevated Temperatures
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Fröhlich, MaikUNSPECIFIEDUNSPECIFIED
Braun, ReinholdUNSPECIFIEDUNSPECIFIED
Leyens, ChristophBrandenburgische Technische Universität Cottbus, Konrad-Wachsmann-Allee, 03046 CottbusUNSPECIFIED
Date:2008
Journal or Publication Title:TMS 2008
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 333-340
Editors:
EditorsEmail
Kim, Y.-W.UNSPECIFIED
Morris, D.UNSPECIFIED
Yeng, R.UNSPECIFIED
Leyens, C.UNSPECIFIED
Publisher:The Minerals, Metals & Materials Society
Status:Published
Keywords:TiAl, Oxidationsschutzschichten, Oxidation
Event Title:TMS Annual Meeting
Event Location:New Orleans
Event Type:international Conference
Event Dates:2008-03-09 - 2008-03-13
Organizer:The Minerals, Metals & Materials 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:28 Nov 2008
Last Modified:27 Apr 2009 15:32

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