Fundamental Coating Development Study to Improve the Isothermal Oxidation Resistance and Thermal Cycle Durability of Thermal Barrier Coatings


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Thermal barrier coatings(TBCs) are used in high temperature gas turbines to reduce the surface temperature of cooled metal parts such as turbine blades[1]. TBC consist of a bondcoat (e.g. MCrAlY where M is Co, Ni, CoNi, etc.) and a partially stabilized zirconia ceramic topcoat. Usually, the MCrAlY bondcoat is applied by LPPS (low pressure plasma spray) or HVOF(high velocity oxi-fuel spray). The topcoat is applied by APS (atmospheric plasma splay) or EB-PVD (electron beam-physical vapor deposition). High temperature oxidation properties, thermal barrier properties and durability of TBC are very important to increase the reliability in high temperature service. In this study, new TBC has been investigated. The new TBC consists of a two-layered bondcoat (LPPS-MCrAlY plus dense PVD overlay MCrAlY) and the EB-PVD type YSZ columnar structure topcoat. As a result of evaluation tests, it was confirmed that the new TBC had better oxidation properties and durability than a conventional TBC system.



Materials Science Forum (Volumes 522-523)

Edited by:

Shigeji Taniguchi, Toshio Maruyama, Masayuki Yoshiba, Nobuo Otsuka and Yuuzou Kawahara




T. Torigoe et al., "Fundamental Coating Development Study to Improve the Isothermal Oxidation Resistance and Thermal Cycle Durability of Thermal Barrier Coatings", Materials Science Forum, Vols. 522-523, pp. 247-254, 2006

Online since:

August 2006




[1] Miller, R. A., Thermal Barrier Coatings for Aircraft Engines - History and Directions, NASA-CP-3312(1995), pp.17-34.

[2] T. Torigoe, Proceeding of ASM 1993 Materials Congress Materials Week '93, (Oct. 17-21), (1993).

[3] M. Ohara, T. Torigoe, Proceeding of the International Gas Turbine Congress 1999, Kobe, (Nov. 4-19) IGTC '99 Kobe TS-76.

[4] J. R. Nicholls et al., Advanced Processing of TBC's Reduced Thermal Conductivity Proceeding of AGARD SMP Meeting on Thermal Barrier Coatings, (1997).

[5] VON ARDENNE ANLAGEN TECHNIK product information.

[6] T. Teratani, et al., Journal of the High Temperature Society of Japan, Vol. 29, 2003, Nov., pp.247-252.

[7] G. M. Kim, N. M. Yanar, E. N. Hewitt, F. S. Pettit, and G. H. Meier, Scripta Materialia, 11 April 2002, vol. 46, No. 7, pp.489-495.


[8] N. M. Yanar, G. H. Meier and F. S. Pettit, Scripta Materialia, 28 February 2002, vol. 46, No. 4, pp.325-330.

[9] A.G. Evans, D.R. Mumm, J.W. Hutchinson, G.H. Meier, F.S. Pettit, Progress in Materials Science, 46 (2001), pp.505-553.

[10] N. M. Yanar, G. M. Kim, F. S. Pettit, and G. H. Meier, Degradation of EBPVD YSZ Thermal Barrier Coatings on Platinum Aluminide and NiCoCrAlY Bond Coats During High Temperature Exposure.


[11] Irwin Stambler�Gas Turbine World, Jan. Feb., 2003, pp.17-18.