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Recent Progress in the Coating Protection of Gamma Titanium Aluminides

Leyens, Christoph and Braun, Reinhold and Fröhlich, Maik and Hovsepian, Papken Eh. (2006) Recent Progress in the Coating Protection of Gamma Titanium Aluminides. Journal of Materials Science, pp. 17-21.

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Engine designers show continuing interest in titanium aluminides based on intermetallic γ-TiAl phase as light–weight structural materials to be used at moderately elevated temperatures. Although alloy development has made significant progresss in terms of environmental resistance, protective coatings have been developed that help to extend the lifetime of these alloys significantly. The major challenge of coatings developments is long-term stability of a protective oxide scale that forms during service for which purpose alumina (Al<sub>2</sub>O<sub>3</sub>) formation is essential. Furthermore, changes of coating chemistries at high temperatures must be controlled in order to avoid rapid degradation of the coatings due to diffusional losses into the substrate material. The paper describes recent work of the authors on metallic Ti-Al-Cr and Ti-Al-Cr-N coatings. Moreover, an attempt will be described to apply thermal barrier coatings on γ-TiAl in order to further push their useful service temperatures to higher limits.

Item URL in elib:https://elib.dlr.de/45254/
Document Type:Article
Title:Recent Progress in the Coating Protection of Gamma Titanium Aluminides
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Hovsepian, Papken Eh.Sheffield Hallam University, Sheffield, UKUNSPECIFIEDUNSPECIFIED
Journal or Publication Title:Journal of Materials Science
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 17-21
Keywords:Hochtemperaturschutz, TiAl, Schutzschichten, Wärmedämmschichten
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:10 Nov 2006
Last Modified:27 Apr 2009 13:12

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