Influences of MCrAlY Coatings and TBCs on Oxidation Behavior of a Ni-Based Single Crystal Superalloy

Abstract:

DD98M alloy is a second generation nickel-based single crystal superalloy without Re addition, which is developed by Institute of Metal Research, Chinese Academy of Sciences. It is a combination of attractively strong points including high strength and low cost. In this work, Ni-based single crystal superalloy DD98M was adopted as the substrate material. Two types MCrAlY (M denote metal) coatings were deposited on DD98M specimen by arc ion plating and YSZ topcoat (TC) were deposited on the substrate by electron beam physical vapor deposition (EB-PVD) on the NiCrAlY bond coat (BC). Experimental results showed that the application of the NiCrAlY and NiCoCrAlYHfSi coatings improved the oxidation resistance of DD98M obviously at 1000 °C. The adhesion of oxide scale of NiCoCrAlYHfSi coating was much better than that of NiCrAlY coating. TBCs application greatly enhanced the operating temperature and significantly improved the durability of the substrate. The thermal growth oxidation (TGO) between the bond coat and topcoat play an important role in adhesion of the whole coating system.

• Periodical: Materials Science Forum (Volume 816)
• Pages: 289-296
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.816.289
• Online since: April 2015
• Authors: Long Shi, Li Xin, Hua Wei, Sheng Long Zhu, Fu Hui Wang
• Keywords: MCrAlY, DD98M, Ni-Based Single-Crystal Superalloy, Oxidation, Thermal Barrier Coating

References

[1] L. Huang, X.F. Sun, H.R. Guan, Z.Q. Hu, Improvement of the oxidation resistance of NiCrAlY coatings by the addition of rhenium, Surf. Coat. Technol. 201 (2006) 1421-1425.

DOI: 10.1016/j.surfcoat.2006.02.009

[2] S. Shankar, D.E. Koenig, L.E. Dardi, Vacuum plasma sprayed metallic coatings, J. Met. 33 (1981) 13-20.

DOI: 10.1007/bf03339507

[3] F.S. Liao, C.W. Hsu, D. Gan, P. Shen, S.Z. Liao, Microstructures of first-stage aluminized coatings on nickel-based superalloys, Mater. Sci. Eng. A. 125 (1990) 215-221.

DOI: 10.1016/0921-5093(90)90171-x

[4] A.B. Smith, A. Kempster, J. Smith, Vapour aluminide coating of internal cooling channels, in turbine blades and vanes, Surf. Coat. Technol. 121 (1999) 112-117.

DOI: 10.1016/s0257-8972(99)00346-1

[5] G.R. Krishna, D.K. Das, V. Singh, S.V. Joshi, Role of Pt content in the microstructural development and oxidation performance of Pt-aluminide coatings produced using a high-activity aluminizing process, Mater. Sci. Eng. A. 251 (1998) 40-47.

DOI: 10.1016/s0921-5093(98)00655-8

[6] N. Czech, F. Schmitz, W. Stamm, Improvement of MCrA1Y coatings by addition of rhenium, Surf. Coat. Technol. 68 (1994) 17-21.

DOI: 10.1016/0257-8972(94)90131-7

[7] C. Leyens, I.G. Wright, B.A. Pint, Effect of Experimental procedures on the cyclic, hot-corrosion behavior of NiCoCrAlY-type bondcoat alloys, Oxid. Met. 54 (2000) 255-276.

[8] A. Hesnawi, H.F. Li, Z.H. Zhou, S.K. Gong, H.B. Xu, Isothermal oxidation behaviour of EB-PVD MCrAlY bond coat, Vacuum . 81 (2007) 947-952.

DOI: 10.1016/j.vacuum.2006.03.024

[9] J.A. Haynes, M.K. Ferber, W.D. Porter, E.D. Rigney, Characterization of alumina scales formed during isothermal and cyclic oxidation of plasma-sprayed TBC systems at 1150°C, Oxid. Met. 52 (1999) 31-76.

[10] C. Leyens, U. Schulz, B.A. Pint, I.G. Wright, Influence of electron beam physical vapor deposited thermal barrier coating microstructure on thermal barrier coating system performance under cyclic oxidation conditions, Surf. Coat. Technol. 121 (1999).

DOI: 10.1016/s0257-8972(99)00343-6

[11] M.J. Pomeroy, Coatings for gas turbine materials and long term stability issues, Mater. Des. 26 (2005) 223-231.

DOI: 10.1016/j.matdes.2004.02.005

[12] J.H. Sun, E. Chang, B.C. Wu, C.H. Tsai, The properties and performance of (ZrO2-8wt. %Y2O3)/(chemically vapour-deposited Al2O3)/(Ni-22wt. %Cr-10wt. %Al-lwt. %Y) thermal barrier coatings, Surf. Coat. Technol. 58 (1993) 93-99.

DOI: 10.1016/0257-8972(93)90179-r

[13] R. Varen, M.O. Jarligo, T. Steinke, D.E. Mack, D. Stover, Overview on advanced thermal barrier coatings, Surf. Coat. Technol. 205 (2010) 938-942.

DOI: 10.1016/j.surfcoat.2010.08.151

[14] L. Huang, X.F. Sun, H.R. Guan, Z.Q. Hu, Oxidation behavior of a single-crystal Ni-base superalloy in air at 900, 1000 and 1100°C, Oxid. Met. 65 (2006) 207-222.

DOI: 10.1007/s11085-006-9016-z

[15] W.S. Walston, J.C. Schaefter, W.H. Murphy, R.D. Kissinger, A new type of microstructural instability in superalloys-SRZ , Superalloys, TMS. (1996) 9-18.

DOI: 10.7449/1996/superalloys_1996_9_18

[16] F. Jamarani, M. Korotkin, Compositionally graded thermal barrier coatings for high temperature aero gas turbine components, Surf. Coat Technol. 54/55 (1992) 58-63.

DOI: 10.1016/0257-8972(92)90140-6

[17] K.S. Fancey, A. Matthews, Ionization assisted physical vapor deposition of zirconia thermal barrier coatings, Journal of Vacuum Science Technology A. 4 (1986) 2656-2666.

DOI: 10.1116/1.573699

[18] H.B. Xu, H.B. Guo, Development of gradient thermal barrier coatings and their hot-fatigue behavior, Surf. Coat. Technol. 130 (2000) 133-139.

DOI: 10.1016/s0257-8972(00)00695-2

[19] A.G. Evans, D.R. Mumm, J.W. Hutchinson, Me-chanisms controlling the durability of thermal barrier coatings, Progress in Materials Science, 46 (2001) 505-553.

DOI: 10.1016/s0079-6425(00)00020-7

[20] A. Rabiei, A.G. Evans, Failure mechanisms associated with the thermally grown oxide in plasma-sprayed thermal barrier coatings, Acta Mater. 48 (2000) 3963-3976.

DOI: 10.1016/s1359-6454(00)00171-3