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- Title
Effects of Ti<sub>0.5</sub>Al<sub>0.5</sub>N coatings on the protecting against oxidation for titanium alloys.
- Authors
Ru, Qiang; Hu, Shejun
- Abstract
Ti0.5Al0.5N coatings were deposited on TC11 (Ti-6.5Al-3.5Mo-1.5Zr-0.3Si) and silicon substrates using a cathode arc ion-plating system. The microstructure, composition, phase structure, and oxidation-resistance of the alloys and nitride coatings were investigated by scanning electron microscopy, X-ray diffraction, transmission electron microscopy, Auger electron spectroscopy, and thermal analyzer. The results show that the oxidation resistance of the titanium alloy is relatively limited; the compound structures of Ti mixed with Al oxides are formed during the heating process. The phases of the Ti0.5Al0.5N coatings are composed of a TiN solid solution phase. The oxidation kinetics obeys the parabolic law. During the oxidation process, the selective oxidation of Al occurs, thus protecting the underlying coating and substrate.
- Publication
Rare Metals, 2010, Vol 29, Issue 2, p154
- ISSN
1001-0521
- Publication type
Article
- DOI
10.1007/s12598-010-0027-1