Abstract
TiAl-based intermetallic layers with additions of Ag, Cr, Y and Hf were deposited on γ-TiAl specimens using magnetron sputtering. The oxidation behaviour of the coated Ti-45Al-8Nb (at.%) alloy was investigated at 850 °C and 900 °C under cyclic oxidation conditions in air. The ternary Ti-50Al-2Ag (at.%) coating did not provide oxidation protection to the substrate material at 850 °C. Two-phase γ-TiAl + Ti(Cr, Al)2 Laves coatings exhibited high oxidation resistance at 900 °C for up to 1000 cycles of 1 h dwell time at high temperature. During thermal exposure phase dissolution and transformation occurred. The slow oxide growth rates observed for the Ti – Al – Cr intermetallic layers were associated with the formation of a thin continuous alumina top scale established by the Laves, B2 and Z-phases. Small additions of hafnium and yttrium improved the oxidation resistance. In contrast, Ti – Al – Cr – Ag coatings exhibited poor oxidation behaviour at 900 °C.
References
[1] F.Appel, U.Brossmann, U.Christoph, S.Eggert, P.Janschek, U.Lorenz, J.Müllauer, M.Oehring, J.D.H.Paul: Adv. Eng. Mater.2 (2000) 699.10.1002/1527-2648(200011)2:11<699::AID-ADEM699>3.0.CO;2-JSearch in Google Scholar
[2] H.Clemens, H.Kestler: Adv. Eng. Mater.2 (2000) 551.10.1002/1527-2648(200009)2:9<551::AID-ADEM551>3.0.CO;2-USearch in Google Scholar
[3] D.M.Dimiduk: Mater. Sci. Eng. A263 (1999) 281.10.1016/S0921-5093(98)01158-7Search in Google Scholar
[4] F.Appel, M.Oehring, in: C.Leyens, M.Peters (Eds.), Titanium and Titanium Alloys, WILEY-VCH Verlag, Weinheim (2003) 89.10.1002/3527602119.ch4Search in Google Scholar
[5] H.Baur, D.B.Wortberg, in: G.Lütjering, J.Albrecht (Eds.), Ti-2003, Science and Technology, Vol. V, WILEY-VCH Verlag, Weinheim (2004) 3411.Search in Google Scholar
[6] T.Tetsui: Mater. Sci. Eng. A329–331 (2002) 582.10.1016/S0921-5093(01)01584-2Search in Google Scholar
[7] X.Wu: Intermetallics14 (2006) 1114.10.1016/j.intermet.2005.10.019Search in Google Scholar
[8] W.Smarsly, H.Baur, G.Glitz, H.Clemens, T.Khan, M.Thomas, in: K.J.Hemker, D.M.Dimiduk, H.Clemens, R.Darolia, H.Inui, J.M.Larsen, V.K.Sikka, M.Thomas, J.D.Whittenberger (Eds.), Structural Intermetallics 2001, The Minerals, Metals & Materials Society, Warrendale (2001) 25.Search in Google Scholar
[9] D.Roth-Fagaraseanu, in: Y.-W.Kim, T.Carneiro (Eds.), Niobium for High Temperature Applications, The Minerals, Metals & Materials Society, Warrendale (2004) 195.Search in Google Scholar
[10] H.Kestler, N.Eberhardt, S.Knippscheer, in: Y.-W.Kim, T.Carneiro (Eds.), Niobium for High Temperature Applications, The Minerals, Metals & Materials Society, Warrendale (2004) 167.Search in Google Scholar
[11] F.Appel, J.D.H.Paul, M.Oehring, C.Buque, in: Y.-W.Kim, H.Clemens, A.H.Rosenberger (Eds.), Gamma Titanium Aluminides 2003, The Minerals, Metals & Materials Society, Warrendale (2003) 139.Search in Google Scholar
[12] F.Appel, J.D.H.Paul, M.Oehring, C.Buque, C.Klinkenberg, T.Caneiro, in: Y.-W.Kim, T.Carneiro (Eds.), Niobium for High Temperature Applications, The Minerals, Metals & Materials Society, Warrendale (2004) 139.Search in Google Scholar
[13] M.Yoshihara, Y.-W.Kim: Intermetallics13 (2005) 952.10.1016/j.intermet.2004.12.007Search in Google Scholar
[14] S.Becker, A.Rahmel, M.Schorr, M.Schütze: Oxid. Met.38 (1992) 425.10.1007/BF00665663Search in Google Scholar
[15] M.Yoshihara, K.Miura: Intermetallics3 (1995) 357.10.1016/0966-9795(95)94254-CSearch in Google Scholar
[16] V.Shemet, A.K.Tyagi, J.S.Becker, P.Lersch, L.Singheiser, W.J.Quadakkers: Oxid. Met.54 (2000) 211.10.1023/A:1004694111032Search in Google Scholar
[17] F.Dettenwanger, E.Schumann, M.Rühle, J.Rakowski, G.H.Meier: Oxid. Met.50 (1998) 269.10.1023/A:1018892422121Search in Google Scholar
[18] L.Singheiser, W.J.Quadakkers, V.Shemet, in: Y.-W.Kim, D.M.Dimiduk, M.H.Loretto (Eds.) Gamma Titanium Aluminides 1999, The Minerals, Metals & Materials Society, Warrendale (1999) 743.Search in Google Scholar
[19] E.H.Copland, B.Gleeson, D.J.Young: Acta mater.47 (1999) 2937.10.1016/S1359-6454(99)00169-XSearch in Google Scholar
[20] S.Taniguchi, H.Juso, T.Shibata: Oxid. Met.49 (1998) 325.10.1023/A:1018878307641Search in Google Scholar
[21] A.Gil, B.Rajchel, N.Zheng, W.J.Quadakkers, H.Nickel: J. Mater. Sci.30 (1995) 5793.10.1007/BF00356723Search in Google Scholar
[22] Y.Wu, K.Hagihara, Y.Umakoshi: Intermetallics12 (2004) 519.10.1016/j.intermet.2004.01.008Search in Google Scholar
[23] Y.Wu, Y.Umakoshi, X.W.Li, T.Narita: Oxid. Met.66 (2006) 321.10.1007/s11085-006-9038-6Search in Google Scholar
[24] V.ShemetM.Yurechko, A.K.Tyagi, W.J.Quadakkers, L.Singheiser, in: Y.-W.Kim, D.M.Dimiduk, M.H.Loretto (Eds.), Gamma Titanium Aluminides 1999, The Minerals, Metals & Materials Society, Warrendale (1999) 783.Search in Google Scholar
[25] M.P.Brady, B.A.Pint, P.F.Tortorelli, I.G.Wright, R.J.Hanrahan, in: M.Schütze (Ed.), Corrosion and Environmental Degradation, Vol. II, WILEY-VCH Verlag, Weinheim (2000) 229.Search in Google Scholar
[26] R.L.McCarron, J.C.Schaeffer, G.H.Meier, D.Berztiss, R.A.Perkins, J.Cullinan, in: F.H.Froes, I.Caplan (Eds.), Titanium '92, Science and Technology, The Minerals, Metals & Materials Society, Warrendale (1993) 1971.Search in Google Scholar
[27] M.P.Brady, J.L.Smialek, D.L.Humphrey: Mat. Res. Soc. Symp. Proc.364 (1995) 1309.Search in Google Scholar
[28] M.P.Brady, W.J.Brindley, J.L.Smialek, I.E.Locci: JOM48(November 1996) 46.10.1007/BF03223244Search in Google Scholar
[29] M.P.Brady, J.L.Smialek, J.Smith, D.L.Humphrey: Acta Mater.45 (1997) 2357.10.1016/S1359-6454(96)00362-XSearch in Google Scholar
[30] M.P.Brady, J.L.Smialek, D.L.Humphrey, J.Smith: Acta Mater.45 (1997) 2371.10.1016/S1359-6454(96)00361-8Search in Google Scholar
[31] L.Singheiser, L.Niewolak, U.Flesch, V.Shemet, W.J.Quadakkers: Metall. Mater. Trans. A34 (2003) 2247.10.1007/s11661-003-0288-5Search in Google Scholar
[32] C.Leyens, R.Braun, M.Fröhlich, P.E.Hovsepian: JOM58(January 2006) 17.10.1007/s11837-006-0062-4Search in Google Scholar
[33] Z.Tang, F.Wang, W.Wu: Oxid. Met.48 (1997) 511.10.1007/BF02153463Search in Google Scholar
[34] L.Niewolak, V.Shemet, E.Wessel, A.Gil, L.Singheiser, W.J.Quadakkers, in: K.J.Hemker, D.M.Dimiduk, H.Clemens, R.Darolia, H.Inui, J.M.Larsen, V.K.Sikka, M.Thomas, J.D.Whittenberger (Eds.), Structural Intermetallics 2001, The Minerals, Metals & Materials Society, Warrendale (2001) 535.Search in Google Scholar
[35] G.S.Fox-Rabinovich, D.S.Wilkinson, S.C.Veldhuis, G.K.Dosbaeva, G.C.Weatherly: Intermetallics14 (2006) 189.10.1016/j.intermet.2005.05.011Search in Google Scholar
[36] R.Braun, M.Fröhlich, C.Leyens, D.Renusch: Oxid. Met.71 (2009) 295.10.1007/s11085-009-9144-3Search in Google Scholar
[37] M.P.Brady, E.D.Verink, J.W.Smith: Oxid. Met.51 (1999) 539.10.1023/A:1018899412977Search in Google Scholar
[38] T.J.Jewett, M.Dahms: Z. Metallkd.87 (1996) 254.Search in Google Scholar
[39] A.Rahmel, W.J.Quadakkers, M.Schütze: Mater. Corros.46 (1995) 271.10.1002/maco.19950460503Search in Google Scholar
[40] C.Lang, M.Schütze: Oxid. Met.46 (1996) 255.10.1007/BF01050799Search in Google Scholar
[41] H.Nickel, N.Zheng, A.Elschner, W.J.Quadakkers: Mikrochim. Acta119 (1995) 23.10.1007/BF01244851Search in Google Scholar
[42] M.Schmitz-Niederau, M.Schütze: Oxid. Met.52 (1999) 225.10.1023/A:1018839511102Search in Google Scholar
[43] M.Yoshihara, Y.-W.Kim, in: Y.-W.Kim, D.M.Dimiduk, M.H.Loretto (Eds.), Gamma Titanium Aluminides 1999, The Minerals, Metals & Materials Society, Warrendale (1999) 753.Search in Google Scholar
[44] R.Braun, C.Leyens, M.Fröhlich: Mater. Corros.56 (2005) 930.10.1002/maco.200503925Search in Google Scholar
[45] J.Doychak, in: J.H.Westbrook, R.F.Fleischer (Eds.), Intermetallic Compounds, Volume 1 – Principles, John Wiley & Sons, Chichester (1995) 997.Search in Google Scholar
[46] V.Shemet, H.Hoven, W.J.Quadakkers: Intermetallics5 (1997) 311.10.1016/S0966-9795(96)00093-3Search in Google Scholar
[47] L.Niewolak, V.Shemet, C.Thomas, P.Lersch, L.Singheiser, W.J.Quadakkers: Intermetallics12 (2004) 1387.10.1016/j.intermet.2004.04.040Search in Google Scholar
[48] Z.Tang, L.Niewolak, V.Shemet, L.Singheiser, W.J.Quadakkers, F.Wang, W.Wu, A.Gil: Mater. Sci. Eng. A328 (2002) 297.10.1016/S0921-5093(01)01734-8Search in Google Scholar
[49] Z.Tang, V.Shemet, L.Niewolak, L.Singheiser, W.J.Quadakkers: Intermetallics11 (2003) 1.10.1016/S0966-9795(02)00062-6Search in Google Scholar
[50] R.Braun, M.Fröhlich, A.Ebach-Stahl, C.Leyens: Mater. Corros.59 (2008) 539.10.1002/maco.200804136Search in Google Scholar
[51] M.Fröhlich, R.Braun, C.Leyens: Surf. Coat. Technol.201 (2006) 3911.10.1016/j.surfcoat.2006.07.248Search in Google Scholar
[52] V.Shemet, P.Karduck, H.Hoven, B.Grushko, W.Fischer, W.J.Quadakkers: Intermetallics5 (1997) 271.10.1016/S0966-9795(96)00091-XSearch in Google Scholar
[53] G.Sauthoff: Z. Metallkd.80 (1989) 337.10.1515/ijmr-1989-800506Search in Google Scholar
[54] T.J.Jewett, B.Ahrens, M.Dahms: Mater. Sci. Eng. A225 (1997) 29.10.1016/S0921-5093(96)10841-8Search in Google Scholar
[55] Y.Wu, K.Hagihara, Y.Umakoshi: Intermetallics13 (2005) 879.10.1016/j.intermet.2005.01.014Search in Google Scholar
[56] R.Prescott, M.J.Graham: Oxid. Met.38 (1992) 233.10.1007/BF00666913Search in Google Scholar
[57] B.A.Pint: Oxid. Met.45 (1996) 1.10.1007/BF01046818Search in Google Scholar
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