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The effect of magnetron-deposited Al2O3 coating on the corrosion resistance of Ti–Al alloys in a 9 %O2 + 0.2 %HCl + 0.08 %SO2 + N2 atmosphere

Joanna Małecka

Abstract

The effect of Al2O3 coating on oxidation and hot corrosion was investigated at 700 °C in an atmosphere of 9 %O2 + 0.2 %HCl + 0.08 %SO2 + N2. Isothermal oxidation testing indicated that the coating was very effective in reducing the oxidation rate of γ-TiAl. The technology of magnetron sputtering used in this study allowed the deposition of a coating that ensured the improvement of high temperature oxidation resistance without interference in mechanical properties of the alloy.


* Correspondence address, Joanna Małecka, PhD, Mikołajczyka 5 Street, 45-271 Opole, Poland, Tel: +48 77 449 8466, Fax: +48 77 449 9927, E-mail:

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Received: 2013-04-21
Accepted: 2013-07-17
Published Online: 2014-01-11
Published in Print: 2014-01-09

© 2014, Carl Hanser Verlag, München