Currently Research Fellow at Cranfield University, Bedfordshire, MK43 0AL (UK).
Enhanced sulphidation/oxidation resistance of Ti–45Al–8Nb alloy by nanostructured CrAlYN/CrN coatings at 750 °C
Article first published online: 21 JUN 2012
© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Materials and Corrosion
Volume 65, Issue 1, pages 45–60, January 2014
How to Cite
Dudziak, T., Du, H. L., Datta, P. K., Ehiasarian, A. P., Reinhard, C. and Hovsepian, P. Eh. (2014), Enhanced sulphidation/oxidation resistance of Ti–45Al–8Nb alloy by nanostructured CrAlYN/CrN coatings at 750 °C. Materials and Corrosion, 65: 45–60. doi: 10.1002/maco.201106417
- Issue published online: 6 JAN 2014
- Article first published online: 21 JUN 2012
- Manuscript Accepted: 11 APR 2012
- Manuscript Received: 21 OCT 2011
- multilayer coating;
This paper discusses the sulphidation/oxidation protection offered by multilayer CrAlYN/CrN coatings etched by Cr, CrAl and Y ions, deposited by a combined high power impulse magnetron sputtering (HIPIMS)/unbalanced magnetron sputtering (UBM) technique on a Ti–45Al–8Nb alloy (at%). The test was performed at 750 °C in an environment of H2/H2S/H2O yielding low oxygen (10−18 Pa) and high sulphur (10−1 Pa) partial pressures for up to 1000 h. The results show that all the exposed materials underwent uneven degradation; some places developed a thin protective oxide scale (Al,Cr)2O3 with a tiny sulphur content, whilst others developed a porous non-protective TiO2 + Al2O3 scale as well with a tiny sulphur content.