EFFECTS OF Al ON Si-Al-Y2O3 CO-DEPOSITION COATINGS ON Nb-Ti-Si BASE ULTRAHIGH TEMPERATURE ALLOY

doi:10.3724/SP.J.1037.2010.00044

Acta Metall Sin

2010, Vol. 46

Issue (7): 821-831 DOI: 10.3724/SP.J.1037.2010.00044

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EFFECTS OF Al ON Si-Al-Y₂O₃ CO-DEPOSITION COATINGS ON Nb-Ti-Si BASE ULTRAHIGH TEMPERATURE ALLOY

ZHANG Ping, GUO Xiping

State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072

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ZHANG Ping GUO Xiping. EFFECTS OF Al ON Si-Al-Y₂O₃ CO-DEPOSITION COATINGS ON Nb-Ti-Si BASE ULTRAHIGH TEMPERATURE ALLOY. Acta Metall Sin, 2010, 46(7): 821-831.

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Abstract

Si-Al-Y₂O₃ co-deposition coatings on an Nb-Ti-Si base ultrahigh temperature alloy were prepared by pack cementation processes at 1050℃. The effects of Al content (mass fraction) in pack mixtures on the microstructure and constituent phases of the co-deposition coatings were studied, and the oxidation-resistant performance of the coating was investigated. The results show that all coatings prepared at 1050℃with pack mixtures containing different Al contents have a multiple layer structure, and the inner layers of all coatings are composed of Al₃(Nb, X) (X represents Ti, Cr and Hf) and (Cr, Al)₂(Nb, Ti) phases. The outer layer of the coating prepared at 1050℃ for 10 h with the pack mixture containing 10% Al is composed of (Nb, X)Si₂, and the middle layer is composed of (Nb, X)₅Si₃. However, the constituent phases change into Al₃(Nb, X) and (Nb, X)₅Si₃ in the middle layer of the coating prepared with the pack mixture containing 15%Al. (Nb, X)₃Si₅Al₂ and (Nb, X)Si₂ phases have been detected in the outer layer of the coating prepared with the pack mixture containing 20%Al, and Al₃(Nb, X) is the main phase constituent in its middle layer with dispersed (Nb, X)₅Si₃ particles in it. EDS analysis reveals that the distribution of Y in the coatings is not uniform, with its content increasing with the rising of Al content in the pack mixtures. Co-deposition of Al and Si occurs in a sequential manner during the deposition process and the growth of the coatings obeys a parabolic kinetics. After oxidation at 1250℃ for 5 h, dense Al₂O₃ scales have formed on the coatings, which prevent the oxygen from diffusion into the substrate effectively.

Key words: Nb-Ti-Si base ultrahigh temperature alloy Si-Al-Y₂O₃ co-deposition coating sequential deposition multiple layer structure oxidation-resistant performance

Received: 24 January 2010

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Supported by National Natural Science Foundation of China (No.50871087) and Fund of State Key Laboratory of Solidification Processing in NWPU (No.07-TP-2008)

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https://www.ams.org.cn/EN/10.3724/SP.J.1037.2010.00044 OR https://www.ams.org.cn/EN/Y2010/V46/I7/821

[1] Bewlay B P, Jackson M R, Zhao J C, Subramaniam P R. Metall Mater Trans, 2003; 34A: 2043
[2] Qu S Y, Han Y F, Song L G. Mater Sci Forum, 2005; 475–479: 737
[3] Subramaniam P R , Mendiratta MG, Dimiduk D M. JOM, 1996; 48: 33
[4] Guo J M, Guo X P, Song S G. Acta Metall Sin, 2008; 44: 574
(郭金明, 郭喜平, 宋曙光. 金属学报, 2008; 44: 574)
[5] Cockeram B V. Surf Coat Technol, 1995; 76: 20
[6] Tian X D, Guo X P. Acta Metall Sin, 2008; 44: 585
(田晓东, 郭喜平. 金属学报, 2008; 44: 585)
[7] Grabke H J, Steinhorst M, Brumm M, Wiemer D. Oxid Met, 1991; 35(3–4): 199
[8] Chow T P, Hamzeh K, Steckl A J. J Appl Phys, 1983; 54: 2716
[9] Xiang Z D, Rose S R, Datta P K. Mater Sci Eng, 2003; A356: 181
[10] Swadzba L, Maciejny A, Mendala B, Moskal G, Jarczyk G. Surf Coat Technol, 2003; 165: 273
[11] Zhou W, Zhao Y G, Li W, Tian B, Hu S W, Qin Q D. Mater Sci Eng, 2007; A458: 34
[12] Bianco R, Rapp R A, Jacobson N S. Oxid Met, 1992; 38(12): 33
[13] Tian X D, Guo X P. Surf Coat Technol, 2009; 203: 1161
[14] Qi T, Guo X P. J Inorg Mater, 2009; 24: 1219
(齐涛, 郭喜平. 无机材料学报, 2009; 24: 1219)
[15] Wang Y, Guo X P. Acta Metall Sin, 2010; 46: 506
(王勇, 郭喜平. 金属学报, 2010; 46: 506)
[16] Zhao J C, Peluso L A, Jackson M R, Tan L Z. J Alloys Compd, 2003; 360: 183
[17] Hellwig A, Palm M, Inden G. Intermetallics, 1998; 6: 79
[18] Zhao J C, Jackson M R, Peluso L A. J Phase Equilib Diffus, 2004; 25: 152
[19] Mahdouk K, Gachon J C. J Alloys Compd, 2001; 321: 232
[20] Zhou Y B, Chen H, Zhang H, Wang Y. Vacuum, 2008; 82: 748
[21] Pratheesh G, Parida S C, Reddy R G. Metall Mater Trans, 2007; 38B: 85
[22] Fernandes P B, Coelho G C, Ferreira F, Nunes C A, Sundman B. Intermetallics, 2002; 10: 993
[23] Zhao J C, Jackson M R, Peluso L A. Mater Sci Eng, 2004; A372: 21
[24] Majumdar S, Sengupta P, Kale G B. Surf Coat Technol, 2006; 200: 3713
[25] Murakami T, Sasaki S, Ichikawa K, Kitahara A. Intermetallics, 2001; 9: 621
[26] An T F, Guan H R, Sun X F, Hu Z Q. Oxid Met, 2000; 54(3–4): 301

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