Preferences help
enabled [disable] Abstract
Number of results
2011 | 120 | 2 | 336-339
Article title

Changes in Microstructure of Air Plasma Sprayed M-CrAlY Coatings After Short Thermal Exposure in Argon Atmosphere

Title variants
Languages of publication
Conventional air plasma spray technique and two powders, NiCrAlY and CoNiCrAlY, were used to produce the M-CrAlY type of coating on the Inconel 713LC substrate. Two phase coatings, consisting of Ni and/or Co solid solution and NiAl intermetallic phase, were produced. A certain amount of imperfectly melted powder particles, voids and aluminium oxide was also present. After air plasma spraying the coatings were annealed at widely ranging temperatures (650, 800, 1000 and 1150°C) for two hours in argon-flow atmosphere. It was found that the temperature significantly affects the microstructure of resulting coatings. The oxide scale was formed by internal oxidation in a coating region primarily at higher temperatures. In this case, aluminium was depleted from the NiAl phase within the coating region and the Ni, Co, Cr solid solutions and the aluminium oxide started to form rapidly. No interaction was observed after the short thermal exposure below the substrate surface. The microstructure of coatings was recorded by scanning electron microscope. Coating thickness, amount of voids and oxide scale were measured by means of image analysis. The concentration of phases was estimated by energy dispersive microanalysis.
Physical description
  • 1. M.J. Donachie, S.J. Donachie, Superalloys - A Technical Guide, ASM International, Ohio 2002)
  • 2. M. Petrenec, K. Obrtlik, J. Polak, Key Eng. Mater. 348-349, 101 (2007)
  • 3. M. Juliš, K. Obrtlík, S. Pospíšilová, T. Podrábský, J. Polák, Procedia Engineering 2, 1983 (2010)
  • 4. Y. Tamarin, Protective Coatings for Turbine Blades , ASM International, Ohio 2002
  • 5. T. Bose, High Temperature Coatings, Elsevier, Oxford 2007
  • 6. L. Čelko, L. Klakurková, O. Man, J. Švejcar, Mater. Manufact. Process. 24, 1155 (2009)
  • 7. T. Patterson, A. Leon, B. Jayaraj, J. Liu, Y.H. Sohn, Surf. Coat. Technol. 203, 437 (2008)
  • 8. L. Huang, X.F. Sun, H.R. Guan, Z.Q. Hu, Surf. Coat. Technol. 201, 1421 (2006)
  • 9. R.A. Mahesh, R. Jayaganthan, S. Prakash, Mater. Chem. Phys. 119, 449 (2010)
  • 10. U. Dragos, M. Gabriela, B. Waltraut, C. Ioan, Solid State Sci. 7, 459 (2005)
  • 11. D. Seo, K. Ogawa, M. Tanno, T. Shoji, S. Murata, Surf. Coat. Technol. 201, 7952 (2007)
  • 12. D. Oquab, C. Estournes, D. Monceau, Adv. Eng. Mater. 9, 413 (2007)
  • 13. M.C. Mayoral, J.M. Andrés, M.T. Bona, V. Higuera, F.J. Belzunce, Surf. Coat. Technol. 202, 1816 (2008)
  • 14. Weizhou Li, Yueqiao Li, Chao Sun, Zhiliu Hu, Tianquan Liang, Wuquan Lai, J. Alloys Compd. (2010), 506, 77 (2010)
  • 15. F.H. Yuan, Z.X. Chen, Z.W. Huang, Z.G. Wang, S.J. Zhu, Corros. Sci. 50, 1608 (2008)
  • 16. J. Toscano, A. Gil, T. Hüttel, E. Wessel, D. Naumenko, L. Singheiser, W.J. Quadakkers, Surf. Coat. Technol. 202, 603 (2007)
Document Type
Publication order reference
YADDA identifier
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.