Abstract
Degradation evolution and failure mechanisms of air plasma-sprayed thermal barrier coatings during thermal cycling were investigated using microstructural and acoustic emission analysis. The microcrack evolution observed suggests that the life-time is governed by the kinetics of crack formation, growth and linking of individual cracks. The damage in the thermal barrier coatings mainly occurs during cooling due to thermal-expansion mismatch stresses at the metal – ceramic interface. The effect of the minimum cycling temperature on the lifetime was found to be much more pronounced than that of a variation in cooling rate. Experimental results were supported by finite element modeling of the stress distribution at the metal – ceramic interface during cooling at different rates.
References
[1] R.A.Miller: Thermal Barrier Coating Workshop, NASA3312 (1995).Search in Google Scholar
[2] N.P.Padture, M.Gell, E.H.Jordan: Science296 (2002) 280.Search in Google Scholar
[3] L.Singheiser, R.Steinbrech, W.J.Quadakkers, D.Clemens, B.Siebert: Materials for Advanced Power Engineering5 (1998) 977.Search in Google Scholar
[4] E.Lugscheider, C.Herbst, L.Zhao: Surf. Coat. Techn.108–109 (1–3) (1998) 16.10.1016/S0257-8972(98)00630-6Search in Google Scholar
[5] F.Tang, L.Ajdelsztajn, G.E.Kim, V.Provenzano, J.M.Schoenung: Mater. Sci. Eng. A425 (2006) 94.Search in Google Scholar
[6] K.W.Schlichting, N.P.Padture, E.H.Jordan, M.Gell: Mater. Sci. Eng. A342 (2003) 120.Search in Google Scholar
[7] H.Echsler, V.Shemet, W.J.Quadakkers, M.Schütze, L.Singheiser: J. Mater. Sci.41 (2006) 1047.Search in Google Scholar
[8] A.G.Evans, D.R.Mumm, J.W.Hutchinson, G.H.Meier, F.S.Pettit: Prog. Mater. Sci.46 (2001) 505.Search in Google Scholar
[9] R.Herzog, P.Bednarz, E.Trunova, V.Shemet, R.W.Steinbrech, F.Schubert, L.Singheiser, in: Ceramic Engineering and Science Proceedings, 27 (2006) CD-ROM.Search in Google Scholar
[10] P.Bednarz: PhD thesis, Rheinisch-Westfälischen Technischen Hochschule Aachen, (2006).Search in Google Scholar
[11] E.P.Busso, J.Lin, S.Sakurai, M.Nakayama: Acta Mater.49 (2001) 1515.Search in Google Scholar
[12] E.P.Busso, J.Lin, S.Sakurai: Acta Mater.49 (2001) 1529.Search in Google Scholar
[13] R.Herzog, N.Warnken, I.Steinbach, B.Hallstedt, C.Walter, J.Mueller, D.Hajas, E.Muenstermann, J.M.Schneider, R.Nickel, D.Parkot, K.Bobzin, E.Lugscheider, P.Bednarz, O.Trunova, L.Singheiser: Adv. Eng. Mater.6 (2006) 535–562.10.1002/adem.200500277Search in Google Scholar
[14] T.Beck, O.Trunova, R.Herzog, R.W.Steinbrech, L.Singheiser, in: Proceedings TMS 2008 Annual Meeting & Exhibition (2008).Search in Google Scholar
[15] S.Heckmann, R.Herzog, R.W.Steinbrech, F.Schubert, L.Singheiser, in: J.Lecomte-Beckers, M.Carton, F.Schubert, P.J.Ennis (Eds.), Materials for Advanced Power Engineering 2002, 21 (2002) 561.Search in Google Scholar
[16] P.Majerus, R.W.Steinbrech, F.Schubert, L.Singheiser, in: J.Lecomte-Beckers, M.Carton, F.Schubert, P.J.Ennis (Eds.), Materials for Advanced Power Engineering 2002, 21 (2002) 551.Search in Google Scholar
[17] E.Trunova, R.Herzog, T.Wakui, R.W.Steinbrech, E.Wessel, L.Singheiser, in: Ceramic Engineering and Science Proceedings 25 (2004) 411.10.1002/9780470291191.ch62Search in Google Scholar
[18] P.Majerus: PhD thesis, Rheinisch-Westfälischen Technischen Hochschule Aachen (2003).Search in Google Scholar
[19] S.Heckmann: PhD thesis, Rheinisch-Westfälischen Technischen Hochschule Aachen (2003).Search in Google Scholar
[20] O.Trunova: PhD thesis, Rheinisch-Westfälischen Technischen Hochschule Aachen (2006).Search in Google Scholar
[21] H.Echsler: PhD thesis, Rheinisch-Westfälischen Technischen Hochschule Aachen (2003).Search in Google Scholar
[22] J.Voyer, F.Gitzhofer, M.I.Boulos: J. Therm. Spray Techn.7 (1998) 181.Search in Google Scholar
[23] D.Renusch, H.Echsler, M.Schütze: Mater. High Temp.21 (2004) 65.Search in Google Scholar
[24] D.Renusch, M.Schütze: Surf. Coat. Techn.202 (2007) 740.Search in Google Scholar
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