The Influence of the Chemical Composition of Superalloys on the Oxidation Resistance of Aluminide Coating

Abstract:

The aim of the present work was to determine the influence of chemical composition of the coating protected nickel based superalloys Inconel 713 LC, Inconel 625 and CMSX 4 on the oxidation resistance of aluminide coating. Protective aluminide coatings were deposited in the CVD process. The low activity aluminizing at the presence of AlCl₃ and H₂ was carried out. Cyclic oxidation test for both coated and uncoated superalloys was performed at 1100°C for 1000 h in the air atmosphere. Microstructure of aluminide coatings after oxidation test was investigated by a scanning electron microscopy (SEM) and an energy dispersive spectroscopy (EDS). The best oxidation resistance shows uncoated Inconel 713 LC superalloy. That is due to a relatively high aluminum content in this alloy. The aluminide coating deposited on the surface of Inconel 625 shows the largest oxidation resistance (insignificnt changes of mass for the whole test duration). Excellent oxidation resistance is a result of Al₂O₃ scale formation.

• Periodical: Solid State Phenomena (Volume 227)
• Pages: 365-368
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.227.365
• Online since: January 2015
• Authors: Maryana Zagula-Yavorska*, Jan Sieniawski, Ryszard Filip
• Keywords: Aluminide Coatings, Oxidation Resistance

References

[1] Zagula-Yavorska M., Sieniawski J.: Microstructural study on oxidation resistance of nonmodified and platinum modified aluminide coating, J. Mater. Eng. Perform. 23 (2014) 918-926.

DOI: 10.1007/s11665-013-0841-3

[2] M. Zielińska, M. Zagula-Yavorska, J. Sieniawski, R. Filip, Microstructure and oxidation resistance of an aluminide coating on the nickel based superalloy MAR M247 deposited by the CVD aluminizing process, Arch. Metall. Mater. 3 (2013) 697-701.

DOI: 10.2478/amm-2013-0057

[3] J. Romanowska, Aluminium diffusion in aluminide coatings deposited by the CVD method on pure nickel, CALPHAD, 44(2014) 114-118.

DOI: 10.1016/j.calphad.2013.09.003

[4] M. Yavorska, J. Sieniawski, M. Zielińska, Functional properties of aluminide layer deposited by CVD method on Inconel 713 LC Ni-base superalloy, Arch. Metall. Mater. 56(1) (2011) 187-192.

DOI: 10.2478/v10172-011-0022-z

[5] J. Romanowska, M. Zagula-Yavorska, J. Sieniawski, The zirconium influence on the microstructure of the aluminide coatings deposited on the nickel substrate by the CVD method, Bull. Mater. Sci. 36 (2013) 1043-1048.

DOI: 10.1007/s12034-013-0579-4