Preparation and Oxidation Behaviour of an Al-Si Coating on a Ni3Al Based Single Crystal Superalloy IC21

Abstract:

An Al-Si coating was prepared on IC21 alloy by powder pack cementation. The cyclic oxidation tests were carried out at 1150 in air for up to 100 h. The results indicate that the oxidation resistance of IC21 alloy is significantly improved by the Al-Si coating due to the presence of Ni₂Al₃ and β-NiAl enriched outer layer, and Si can effectively supress the outward diffusion of Mo. The oxide scales mainly consist of α-Al₂O₃, which is the favorite to the oxidation resistance. Phase transformation occurred from β-NiAl to γ-Ni₃Al and γ-Ni in the coating during oxidation. The coating still remained a certain amount of β phase after oxidation for 100h, which indicate a good protection. The microstructure change evolution was characterized, and the oxidation behavior of the coating was discussed.

• Periodical: Materials Science Forum (Volumes 747-748)
• Pages: 575-581
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.747-748.575
• Online since: February 2013
• Authors: Yu Zhuo Liu, Qiong Wu, Shu Suo Li, Yue Ma, Sheng Kai Gong
• Keywords: Al-Si Coating, High-Temperature Oxidation, Superalloy, β-NiAl

References

[1] REED R, The superalloys: Fundamentals and applications [M]. London: Cambridge University Press, (2006).

[2] ANGENETE J, STILLER K, A comparative study of two inward grown Pt modified Al diffusion coatings on a single crystal Ni based superalloy [J]. Material Science and Engineering A, 2001, 316: 182−194.

DOI: 10.1016/s0921-5093(01)01236-9

[3] F.S. Liao C.W. Hsu, D. Gan, P. Shen, S.Z. Liao, Mi-crostructures of first-stagealuminized coatings on Nickel-based superalloys. Materials Science and En-gineering A1990; 125: 215-221.

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

[4] A.B. Smith, A. Kempster, J. Smith, Vapour aluminide coating of internal coolingchannels, in turbine blades and vanes. Surface & Coatings Technology1999; 121: 112-117.

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

[5] E. Godlewska, K. Godlewski, Chromalumizing of nickel and its alloys, Oxid. Met. 3 (1984) 117–131.

DOI: 10.1007/bf00656900

[6] H.W. Grunling, R. Bauer, The role of silicon in corrosion-resistant high temperature coatings, Thin Solid Films 95 (1982) 3–20.

DOI: 10.1016/0040-6090(82)90578-8

[7] K. Shirvani, M. Saremi, A. Nishikata, T. Tsuru, The effect of silicon on cyclic oxidation behavior of aluminide coatings on superalloy IN-738LC, Mater. Sci. Forum 461–464 (2004) 335–342.

DOI: 10.4028/www.scientific.net/msf.461-464.335

[8] J. Angenete, K. Stiller, A comparative study of two inward grown Pt modified Al diffusion coating on a single crystal Ni base superalloy, Mater. Sci. Eng. A A316(2001) 182–194.

DOI: 10.1016/s0921-5093(01)01236-9

[9] S.M. Jiang, X. Peng, Z.B. Bao, S.C. Liu, Q.M. Wang, J. Gong, C. Sun, Preparationand hot corrosion behaviour of a MCrAlY+AlSiY composite coating. CorrosionScience 2008; 50: 3213-3220.

DOI: 10.1016/j.corsci.2008.08.018

[10] J.G. Smeggil, Some comments on the role of yttrium in protective oxide scale adherence, Mater. Sci. Eng. A 87 (1987) 261–265.

DOI: 10.1016/0025-5416(87)90387-9

[11] Z.D. Xiang, P.K. Datta, Relationship between pack chemistry and aluminide coating formation for low-temperature aluminisation of alloy steels, Acta Mater. 54 (2006) 4453–4463.

DOI: 10.1016/j.actamat.2006.05.032

[12] R. Mevrel, C. Duret, R. Pichoir, Pack cementation processes, Mater. Sci. Technol. 2 (1986) 201–206.

[13] G.W. Goward, D.H. Boone, Mechanisms of formation of diffusion aluminide coatings on nickel-base superalloys, Oxid. Met. 3 (1971) 475–495.

DOI: 10.1007/bf00604047

[14] D. Strauss, G. Muller, G. Schumacher, V. Engelko, W. Stamm, D. Clemens, W.J. Quaddakers, Oxide scale growth on MCrAlY bond coatings after pulsed elec-tron beam treatment and deposition of EBPVD-TBC. Surface & Coatings Technology2001; 135: 196-201.

DOI: 10.1016/s0257-8972(00)00916-6

[15] Z. Liu, W. Gao, F. Wang, Oxidation behaviour of FeAl intermetallic coatings produced by magnetron sputter deposition. Scripta Materialia 1998; 39: 1497-1502.

DOI: 10.1016/s1359-6462(98)00360-1

[16] D. Clemens, H. Nickel, TEM and SNMS studies of protective alumina scales on NiCrAlY-alloys, J. Anal. Chem. 355 (1996) 703–706.

DOI: 10.1007/s0021663550703

[17] D. Toma, W. Brandl, U. Koster, The Characteristics of Alumina Scales Formed on HVOF-Sprayed MCrAlY Coatings. Oxidation ofMetals 1999; 55: 125-137.

DOI: 10.1016/s0257-8972(98)00613-6

[18] G.B. Abderrazik, G. Moulin, A.M. Huntz, E.W.A. Young, J.H.W. Wit, Growth mechanism of Al2O3 scales developed on FeCrAl alloys, Solid State Ionics 22(1987) 285–294.

DOI: 10.1016/0167-2738(87)90146-9

[19] K. Zhang, Q.M. Wang, C. Sun, F.H. Wang, Preparation and oxidation behavior of NiCrAlYSi coating on a cobalt-base superalloy K40S, Corros. Sci. 50 (2008)1707–1715.

DOI: 10.1016/j.corsci.2008.01.033

[20] YOON J K, BYUN J Y, KIM G H, et al., Growth kinetics of three Mo-silicide layers formed by chemical vapor deposition of Si on Mo substrate [J]. Surface and Coatings Technology, 2002, 155(1): 85−95.

DOI: 10.1016/s0257-8972(02)00015-4

[21] T. Takahashi, D.C. Dunand, Nickel aluminide containing refractory-metal dispersoids 2: microstructure and properties, Mater. Sci. Eng. A 192/193(1995) 195–203.

DOI: 10.1016/0921-5093(94)03235-1

[22] V. Shankar, A.L.E. Terrance, S. Venkadesan, The ef-fect of diffusion barrierformation on the kinetics of aluminizing in inconel-718. Journal of Materials Sci-ence1994; 29: 5424-5428.

DOI: 10.1007/bf01171556