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Oxidation‐Resistant Coatings for Application on High‐Temperature Titanium Alloys in Aeroengines
Author(s) -
Leyens C.,
Peters M.,
Kaysser A.
Publication year - 2000
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/(sici)1527-2648(200005)2:5<265::aid-adem265>3.0.co;2-u
Subject(s) - materials science , titanium , metallurgy , coating , titanium alloy , substrate (aquarium) , composite material , alloy , oceanography , geology
High‐temperature application of titanium alloys in aeroengines is often limited by their insufficient resistance to the aggressive environment. Magnetron‐sputtered Ti–Al based coatings were developed in order to increase the maximum service temperature of conventional titanium alloys from the present 520–600 °C, the temperature limit set by the mechanical capabilities of most advanced alloys. The coatings not only demonstrated excellent oxidation resistance but also demonstrated beneficial effects on mechanical properties. Most importantly, the fatigue behavior of the substrate alloys was not degraded, a major hurdle for coating application on titanium alloys so far. Initial results on Cr‐containing Ti–Al based coatings indicated significant potential for application on titanium aluminides.