Characteristics of Phenomena in Powders Type RE2Zr2O7-Al2O3 in High Temperature Annealing Conditions


Article Preview

The paper presents test results and characterizes the structural stability of powders, which form a mixture of aluminium oxide (Al2O3) and gadolinium, based on rare earth zirconates. This mixture is provided to create thermal barrier coatings (TBCs) by spraying. The purpose of the tests was to determine the influence of temperature on reactions, occurring between those powders within a temperature range from 25°C to 1500°C, while such conditions were to simulate the conditions, which occur during creation of TBCs and they give an answer to the question concerning mutual reactivity of the powders. The requirements for new materials, provided to spray the TBCs, indicate the necessity to prepare the materials, which do not show tendency towards reactions with the Al2O3, formed during oxidation of Ni (Co) CrAlY, while this reaction is of type bond coat. The tests included differential scanning calorimetric (DSC) analysis and differential thermal analysis (DTA) of powder mixtures. Diffraction analysis was also performed before and after the tests have been finished. The DSC analysis results, obtained at a range of high temperature, did not show any thermal effects, which indicate a low level of mutual reactivity of the powders. However, the DTA analysis suggests presence of such effects at temperature close to 1300°C, and it indicates the necessity to verify exactly the obtained results. Results of the XRD measurement showed that after annealing process already at 1100°C the perovskite oxide of GdAlO3 was present.



Defect and Diffusion Forum (Volumes 312-315)

Edited by:

Prof. Andreas Öchsner, Prof. Graeme E. Murch and Prof. João M.P.Q. Delgado




G. Moskal et al., "Characteristics of Phenomena in Powders Type RE2Zr2O7-Al2O3 in High Temperature Annealing Conditions", Defect and Diffusion Forum, Vols. 312-315, pp. 583-588, 2011

Online since:

April 2011




[1] R. L. Jones: in Metallurgical and Ceramic Coatings. London: Chapman & Hall; 1996. p.194.

[2] A. G. Evans et al: Progress in Materials Science Vol. 46 (2001), p.505.

[3] N. P. Padture, M. Gell, E. H. Jordan: Science Vol. 296 (2002), p.280.

[4] R. Vassen et al: Journal of American Ceramic Society Vol. 83 (2000), p. (2023).

[5] N. P. Padture, M. Gell, P. G. Klemens: US Patent No. 6. 015. 630 (2000).

[6] M. J. Maloney: US Patent No. 6. 284. 323 (2001).

[7] R. Subramanian: US Patent No. 6. 258. 467 (2001).

[8] J. R. Nicholls et al: Surface and Coating Technology Vols. 151-152 (2002), p.383.

[9] D. Zhu, R.A. Miller: Ceramic Engineering and Science Proceedings Vols. 23-24 (2002), p.457.

[10] J. Wu et al: Journal of American Ceramic Society Vol. 85 (2002), p.3031.

[11] J. Wu et al: Journal of Materials Test Vol. 17 (2002) p.3193.

[12] M. J. Maloney: US Patent No. 6. 177. 200 (2001).

[13] D. K. Leung et al: Journal of American Ceramic Society Vol. 74 (1991), p.2786.

[14] S. Senz et al: in Epitaxial oxide thin films II. 1995. Boston, Massachusetts: MRS.

[15] P.P. Budnikov, V.I. Kushakovskij, V.S. Belavantsev: Doklady Chemistry Vol. 165 (1965), p.1177.

[16] A. Rouanet: Revue Internat. des Hautes Temperatures et des Refractaires Vol. 8 (1971), p.161.

[17] U. Kolitsch, H. J. Seifert, F. Aldinger: J. Alloys and Compounds Vol. 257 (1997), p.104.

[18] S. M. Lakiza, L. M. Lopato: Journal of Alloys and Compounds Vol. 80 (1997), p.893.

[19] O. Fabrichnaya, F. Aldinger: Zeitschrift fur Metallkunde Vol. 95 (2004), p.27.

[20] M.L. Balmer, F.F. Lange, C.G. Levi: J. American Ceramic Society Vol. 77 (1994), p. (2069).

[21] C. G. Levi: in International Workshop on the Science and Technology Alumina. Scholss Ringberg, Germany, March (2002).

[22] S.J. Schneider, R.S. Roth, J.L. Waring: Journal of test of the National Bureau of Standards Vol. 65A (1961), p.345.

[23] N. I Timofeeva et al: Inorganic Materials Vol. 5 (1969), p.1476.

[24] C. G. Levi: Current Opinion in Solid State and Materials Science Vol. 8 (2004), p.77.

[25] R. M. R. Leckie, N. R. Rebollo, J. Y. Yang, C. G. Levi: in: Proceedings of an International Symposium on Thermal Barrier Coatings and Titanium Aluminides for Gas Turbines (TurbOMat), ed. W. A. Kaysser, Bonn, Germany, DLR; (2002).

[26] O. Fabrichnaya et al: Journal of Phases Equilibria and Diffusion Vol. 26 (2005), p.591.

[27] O. Fabrichnaya et al: Journal of Phases Equilibria and Diffusion Vol. 27 (2006), p.343.

[28] S. Lakiza, O. Fabrichnaya, Ch. Wang, M. Zinkevich, F. Aldinger: Journal of the European Ceramic Society Vol. 26 (2006), p.233–246.


[29] G. Moskal, A. Rozmysłowska: Advanced Materials Test Vol. 98-91 (2010), p.739.

[30] G. Moskal, G. Dercz: Solid State Phenomena Vol. 163 (2010), p.157.

Fetching data from Crossref.
This may take some time to load.