Barium-doped bond coat for thermal barrier coatings

Details Barium-doped bond coat for thermal barrier coatings Barium-doped bond coat for thermal barrier coatings

2011-04-19

2011-04-19

Austin, Aaron (Department: 1784)

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

C428S650000, C428S653000, C428S678000, C428S680000, C428S681000, C427S383700, C416S24100B, C416S24100B

Reexamination Certificate

active

07927714

ABSTRACT:
A metallic article for high temperature applications such as a turbine engine component is protected by a thermal barrier coating system on the article's metallic substrate. The thermal barrier coating system includes a bond coat layer of aluminum containing alloy on the metal substrate, an alumina layer on the bond coat layer and a ceramic thermal barrier layer on the alumina layer. The bond coat layer is doped with elemental barium that enhances the creep resistance of the alumina layer, thus, minimizing spallation of the ceramic thermal barrier layer.

REFERENCES:
patent: 5788823 (1998-08-01), Warnes et al.
patent: 5824423 (1998-10-01), Maxwell et al.
patent: 5900326 (1999-05-01), Bornstein et al.
patent: 5985470 (1999-11-01), Spitsberg et al.
patent: 6025078 (2000-02-01), Rickerby et al.
patent: 6129991 (2000-10-01), Warnes et al.
patent: 6132520 (2000-10-01), Schilbe et al.
patent: 6136451 (2000-10-01), Warnes et al.
patent: 6177200 (2001-01-01), Maloney
patent: 6254935 (2001-07-01), Eaton et al.
patent: 6284323 (2001-09-01), Maloney
patent: 6287644 (2001-09-01), Jackson et al.
patent: 6391475 (2002-05-01), Spitsberg et al.
patent: 6458473 (2002-10-01), Conner et al.
patent: 6548190 (2003-04-01), Spitsberg et al.
patent: 6974637 (2005-12-01), Pfaendtner et al.
patent: 6979498 (2005-12-01), Darolia et al.
patent: 7172820 (2007-02-01), Darolia et al.
patent: 7226668 (2007-06-01), Nagaraj et al.
patent: 7338719 (2008-03-01), Quadakkers et al.
patent: 7378159 (2008-05-01), Gorman et al.
patent: 2007/0044869 (2007-03-01), Darolia et al.
patent: 2007/0160859 (2007-07-01), Darolia et al.
patent: 1008672 (2000-06-01), None
patent: 0780484 (2001-09-01), None
patent: 1295965 (2003-03-01), None
patent: 1806434 (2007-07-01), None
Coble, R. L., “A Model for Boundary Diffusion Controlled Creep in Polycrystalline Materials”, Journal of Applied Physics, Jun. 1963, vol. 34, No. 6, pp. 1679-1682.
Haynes, J. A., Ferber, M. K., Porter, W. D., Rigney E. D., Characterization of Alumina Scales Formed During Isothermal and Cyclic Oxidation of Plasma-Sprayed TBC Systems at 1150° C., Oxidation of Metals, 1999, vol. 52, Nos. 112, pp. 31-76.
Langdon, T. G., “Grain boundary sliding revisited: Developments in sliding over four decades”, J Mater Sci 41, 2006, pp. 597-609.
Pint, B. A., Hobbs; L. W., “The Formation of a-A12O3 Scales at 1500° C.”, 1994, Oxidation of Metals, 1994, vol. 41, Nos. 3/4, pp. 203-233.
Kottada, R. S., Chokshi, A. H., “The High Temperature Tensile and Compressive Deformation Characteristics of Magnesia Doped Alumina”, Acta Metallurgica, 2000, vol. 48, pp. 3905-3915.
Matsunaga, K. Nishimura, H., Muto, H., Yamamoto, T., Ikuhara, Y., “Direct measurements of grain boundary sliding in yttrium-doped alumina bicrystals”, Applied Physics Letters, Feb. 24, 2003, vol. 82, No. 8, pp. 1179-1181.
Chokshi, A. H., “An evaluation of the grain-boundry sliding contribution to creep deformation in polycrystalline alumina”, J Mater Sci 25, 1990, pp. 3221-3228.
Veal, B. W., Paulikas A. P., Hou, P. Y., “Creep in protective a-A12O3 thermally grown on B-NiAI”, Applied Physics Letters, 2007, vol. 90:121914.
Nakamura K., Mizolguchi T., Shibata, N., Matsunaga, K., Yamamoto, T., Ikuhara, Y., “First-principles study of grain boundary sliding in a-A12O3”, 2007, Physical Review B 75:184109.
Hohenberg, P., Kohn, W., “Inhomogeneous Electron Gas”, Physical Review, Nov. 9, 1964, vol. 136, No. 3B, pp. B864-871.
Kohn, W., Sham, L. J., “Self-Consistent Equations Including Exchange and Correlation Effects”, Physical Review, Nov. 15, 1965, vol. 140, No. 4A, pp. A1133-1138.
Kresse G., Hafner, J., “Ab initio molecular dynamics for open-shell transition metals”, Physical Review B, Nov. 1, 1993, vol. 48, No. 17, pp. 13115-13118.
Kresse, G., Fürthmuller, J., “Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set”, Physical Review B, vol. 54, No. 16, pp. 11169-11186.
Kresse, G., Fürthmuller, J., “Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set”, 1996, Computational Materials Science, vol. 6, pp. 15-50.
Blöchl, P. E., “Projector augmented-wave method”, Dec. 15, 1994, Physical Review B, vol. 50, No. 24, pp. 17953-17979.
Kresse, G., Joubert D., “From ultrasoft pseudopotentials to the projector augmented-wave method”, Jan. 15, 1999, Physical Review B., vol. 59, No. 3, pp. 1758-1775.
Perdew, J. P., Burke, K., Ernzerhof, M., “Generalized Gradient Approximation Made Simple”, Physical Review Letters, Oct. 28, 1996, vol. 77, No. 18, pp. 3865-3868.
Monkhorst, H. J., Pack, J., D., “Special points for Brillouin-zone integrations”, Physical Review B., Jun. 15, 1976, vol. 13, No. 12, pp. 5188-5192.
Hinnemann, B., Carter, E. A., “Adsorption of A1, O, Hf, Y, PT, and S Atoms on a-A12O3(0001)”, J. Phys. Chem. C, 2007, vol. 111, pp. 7105-7126.
Milas, I., Hinnemann, B., Carter, E. A., “Structure of and ion segregation to an alumina grain boundary: Implications for growth and creep”, J. Mater. Res., May 2008, vol. 23, No. 5, pp. 1494-1506.
Kenway, P.R., “Calculated Structures and Energies of Grain Boundaries in a-A13O3”, J. Am. Ceram. Soc., 1994, vol. 77, pp. 349-355.
Cho, J., Wang, C. M., Chan, H. M., Rickman, J. M., Harmer, M. P., “Role of Segregating Dopants on the Improved Creep Resistance of Aluminum Oxide”, Acta Mater, 1999, vol. 47, No. 15, pp. 4197-4207.
Molteni, C., Francis, G. P., Payne, M.C., Heine, V., “First Principles Simulation of Grain Boundary Sliding”, Physical Review Letters, Feb. 19, 1996, vol. 76, No. 8, pp. 1284-1287.
Voytovych, R., MacLAREN, I., Gülgün, M. A., Cannon, R. M., Rühle, M., “The effect of yttrium on densification and grain growth in a-alumina”, Acta Materialia, 2002, vol. 50, pp. 3453-3463.
Wang, C. M., Cargill III, G. S., Chan, H. M., Harmer, M. P., “Structural Features of Y-Saturated and Supersaturated Grain Boundaries in Alumina”, Acta Materialia, 2000, vol. 48, pp. 2579-2591.

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