OJMetal  Vol.3 No.4 , December 2013
Zirconium Modified Aluminide Coatings Obtained by the CVD and PVD Methods
Abstract: The paper presents the comparison of the structures of the zirconium modified aluminide coatings deposited on pure nickel by the CVD and PVD methods. In the CVD process, zirconium was deposited from the ZrCl3 gas phase at the 1000°C. Zirconium thin layer (1 or 7 μm thick) and aluminum thin layer (1.0, 0.7 or 0.5 μm thick) were deposited by the EB-PVD method. Deposition velocity was about 1 ?m/min. The layers obtained by the Electron Beam Evaporation method were subjected to diffusion treatment for 2 h in the argon atmosphere. The obtained coatings were examined by the use of an optical microscope (microstructure and coating thickness) a scanning electron microscope (chemical composition on the cross-section of the modified aluminide coating) and XRD phase analysis. Microstructures and phase compositions of coatings obtained by different methods differ significantly. NiAl(Zr), Ni3Al and Ni(Al) phases were found in the CVD aluminide coatings, whereas Ni5Zr, Ni7Zr2 and γNi(Al,Zr) were observed in coatings obtained by the PVD method. The results indicate that the microstructure of the coating is strongly influenced by the method of manufacturing.
Cite this paper: J. Romanowska, M. Zagula-Yavorska, J. Sieniawski and J. Markowski, "Zirconium Modified Aluminide Coatings Obtained by the CVD and PVD Methods," Open Journal of Metal, Vol. 3 No. 4, 2013, pp. 92-99. doi: 10.4236/ojmetal.2013.34014.

[1]   Y. Tamarin, “Protective Coatings for Turbine Blades,” ASM International, Materials Park, 2002.

[2]   S. Bose, “High Temperature Coating,” Elsevier Inc., Burlington, 2007.

[3]   G. W. Goward, “Protective Coatings—Purpose, Role and Design,” Materials Science and Technology, Vol. 2, No. 10, 1986, pp. 194-200.

[4]   M. A. Bestor, R. L. Martens, R. A. Holler and M. L. Weaver, “Influences of Annealing and Hafnium Concentration on the Microstructures of Sputter Deposited β- NiAl Coatings on Superalloy Substrates,” Intermetallics, Vol. 18, No. 11, 2010, pp. 2159-2168.

[5]   B. A. Pint, J. R. Di Stefano and I. G. Wright, “Oxidation Resistance: One Barrier to Moving beyond Ni-Base Superalloys,” Materials Science and Engineering: A, Vol. 415, No. 1-2, 2006, pp. 255-263.

[6]   M. Zielińska, J. Sieniawski, M. Yavorska and M. Motyka, “Influence of Chemical Composition of Nickel Based Superalloy on the Formation of Aluminide Coatings,” Archives of Metallurgy and Materials, Vol. 56, No. 1, 2011, pp. 193-197.

[7]   M. Yavorska, J. Sieniawski and M. Zielińska, “Functional Properties of Aluminide Layer Deposited on Inconel 713 LC Ni-Based Superalloy in the CVD Process,” Archives of Metallurgy and Materials, Vol. 56, No. 1, 2011, pp. 187-192.

[8]   B. A. Pint, I. G. Wright, W. Y. Lee, Y. Zhang, K. Prussner and K. B. Aleksander, “Substrate and Bond Coat Compositions: Factors Affeccting Alumina Scale Adhesion,” Materials Science and Engineering: A, Vol. 245, No. 2, 1998, pp. 201-211.

[9]   M. Zagula-Yavorska, J. Romanowska and J. Sieniawski, “Platinum Diffusion in Pure Nickel,” Wulfenia Journal, Vol. 20, 2013, pp. 222-234.

[10]   B. M. Warnes, “Reactive Element Modified Chemical Vapor Deposition Low Activity Platinum Aluminide Coatings,” Surface and Coatings Technology, Vol. 146-147, 2001, pp. 7-12.

[11]   B. A. Pint, “The Role of Chemical Composition on the Oxidation Performance of Aluminide Coatings,” Surface and Coatings Technology, Vol. 188-189, 2004, pp. 71-78.

[12]   Y. Wang, M. Suneson and G. Sayre, “Synthesis of Hf-Modified Aluminide Coatings on Ni-Base Superalloys,” Surface & Coatings Technology, Vol. 206, No. 6, 2011, pp. 1218-1228.

[13]   S. Hamadi, M. Bacos, M. Poulain, A. Seyeux, V. Maurice and P. Marcus, “Oxidation Resistance of a Zr-Dopped NiAl Coating Thermochemically Deposited on a Nickel-Based Superalloy,” Surface & Coatings Technology, Vol. 204, No. 6-7, 2009, pp. 756-760.

[14]   D. Larson and M. Miller, “Atom Probe Field-Ion Microscopy Characterization of Nickel and Titanium Aluminides,” Materials Characterization, Vol. 44, No. 1-2, 2000, pp. 159-165.

[15]   T. Rhys-Jones, “Coatings for Blade and Vane Applications in Gas Turbines,” Corrosion Science, Vol. 29, No. 6, 1989, pp. 623-646.

[16]   B. Movchan, “Functionally Graded EB-PVD Coatings,” Surface and Coatings Technology, Vol. 149, No. 2-3, 2002, pp. 252-262.

[17]   H. Guo, L. Sun, H. Li and S. Gong, “High Temperature Oxidation Behavior of Hafnium Modified NiAl Bond Coat in EB-PVD Thermal Barrier Coating System,” Thin Solid Films, Vol. 516, No. 16, 2008, pp. 5732-5735.

[18]   A. Nowotnik, J. Sieniawski, M. Góral, M. Pytel and K. Dychton, “Microstructure and Kinetic Growth of Aluminide Coatings Deposited by the CVD Method on Re 80 Superalloy,” Archives of Materials Science and Engineering, Vol. 55, No. 1, 2012, pp. 22-28.

[19]   M. Zagula-Yavorska, J. Sieniawski and T. Gancarczyk, “Some Properties of Platinum and Palladium Modified Aluminide Coatings Deposited by CVD Method on Nickel-Base Superalloys,” Archives of Metallurgy and Materials, Vol. 57, No. 2, 2012, pp. 504-509.

[20]   J. Romanowska, “Aluminum Diffusion in Aluminide Coatings Deposited by the CVD Method on Pure Nickel,” Calphad, in Press, 2013.

[21]   J. Romanowska, M. Zagula-Yavorska and J. Sieniawski, “Zirconium Influence on Microstructure of Aluminide Coatings Deposited on Nickel Substrate by CVD Method,” Bulletin of Materials Science, 2013.

[22]   M. Bacos, J. Dorvaux, S. landais, O. Lavigne, R. Mevrel, M. Poulain, C. Rio and M. Vidal-Setif, “10 Years-Activities at Onera on Advanced thermal Barrier Coatings,” ONERA—Aerospace Lab Journal, Vol. 3, 2011, pp. 1-14.

[23]   G. Bozolo, R. Noebe and F. Honect, “Modeling of Ternary Element Site Substitution in NiAl,” Intermetallics, Vol. 8, No. 1, 2000, pp. 7-18.