Fabrication of TiAl3 coating on TiAl-based alloy by Al electrodeposition from dimethylsulfone bath and subsequent annealing

TiAl3 coating was formed on TiAl alloy by Al electrodeposition from a dimethylsulfone (DMSO2) bath and subsequent annealing. Before the Al electrodeposition, anodic dissolution of TiAl substrate in the DMSO2 bath was conducted to remove the surface oxide layer of the TiAl substrate. By performing th...

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Bibliographic Details
Published in:Surface & coatings technology 2011-08, Vol.205 (21-22), p.5141-5146
Main Authors: MIYAKE, Masao, TAJIKARA, Seiya, HIRATO, Tetsuji
Format: Article
Language:English
Subjects:
Aluminides
Aluminum
Annealing
Applied sciences
Cross-disciplinary physics: materials science
rheology
Electrodeposition
Exact sciences and technology
Intermetallic compounds
Intermetallics
Materials science
Metallic coatings
Metals. Metallurgy
Physics
Production techniques
Surface treatment
Surface treatments
Titanium aluminides
Titanium base alloys
Titanium compounds
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Description
Summary:TiAl3 coating was formed on TiAl alloy by Al electrodeposition from a dimethylsulfone (DMSO2) bath and subsequent annealing. Before the Al electrodeposition, anodic dissolution of TiAl substrate in the DMSO2 bath was conducted to remove the surface oxide layer of the TiAl substrate. By performing the Al electrodeposition immediately after the anodic dissolution, uniform Al films adherent to the TiAl substrate could be obtained. Annealing at 650-1000 degree C yielded a single TiAl3 layer or two layers of TiAl3 and TiAl2 on the TiAl substrate. The resulted TiAl3 layer was confirmed to show oxidation-resistance at high temperatures.
ISSN:0257-8972
1879-3347
DOI:10.1016/j.surfcoat.2011.05.019