caa a22 4500 445844183 CHVBK 20180317145353.0 cr unu---uuuuu 170323e20111001xx s 000 0 eng 10.1007/s11085-011-9257-3 doi (NATIONALLICENCE)springer-10.1007/s11085-011-9257-3 Microstructural Characterization and Cyclic Hot Corrosion Behaviour of Sputtered Co-Al Nanostructured Coatings on Superalloy [Elektronische Daten] [Atikur Rahman, R. Jayaganthan, Ramesh Chandra, R. Ambardar] Nanostructured Co-Al coatings on Superni-718 superalloy substrate were deposited by DC/RF magnetron sputtering in the present work. The microstructure and cyclic hot-corrosion behavior of nanostructured Co-Al coatings on Superni-718 superalloy were investigated in molten salt of 40wt% Na2SO4+60wt% V2O5 at 900°C. The results showed that a dense scale formed on the coated samples exposed to corrosive environment during thermal cycling. The spinel phases of CoCr2O4, CoAl2O4 and NiCr2O4 were found in the corroded scale of the coatings, resulting in an effective inhibition of O and S diffusion. The sputtered Co-Al coatings exhibited high hot corrosion resistance due to the formation of β-CoAl phases in the coating. The relevant corrosion mechanisms substantiating the role of coatings are discussed. Springer Science+Business Media, LLC, 2011 Nanostructured Co-Al coating nationallicence Magnetron sputtering nationallicence Molten salts nationallicence Hot corrosion nationallicence Rahman Atikur Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, 247667, Roorkee, India aut Jayaganthan R. Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, 247667, Roorkee, India aut Chandra Ramesh Institute Instrumentation Centre, Indian Institute of Technology Roorkee, 247667, Roorkee, India aut Ambardar R. Department of Metallurgical Engineering, National Institute of Technology Hazratbal, 190006, Srinagar, India aut Oxidation of Metals Springer-Verlag 76/3-4(2011-10-01), 307-330 0030-770X 76:3-4<307 2011 76 11085 https://doi.org/10.1007/s11085-011-9257-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11085-011-9257-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rahman Atikur Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, 247667, Roorkee, India aut NATIONALLICENCE 700 1- Jayaganthan R. Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, 247667, Roorkee, India aut NATIONALLICENCE 700 1- Chandra Ramesh Institute Instrumentation Centre, Indian Institute of Technology Roorkee, 247667, Roorkee, India aut NATIONALLICENCE 700 1- Ambardar R. Department of Metallurgical Engineering, National Institute of Technology Hazratbal, 190006, Srinagar, India aut NATIONALLICENCE 773 0- Oxidation of Metals Springer-Verlag 76/3-4(2011-10-01), 307-330 0030-770X 76:3-4<307 2011 76 11085 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer