The Influence of Turbine Blade Geometry and Process Parameters on the Structure of Zr Modified Aluminide Coatings Deposited by CVD Method on the ZS6K Nickel Superalloy

Article Preview

Abstract:

The Zr modified aluminide coatings is an alternative concept for replacing Pt-modified aluminide bondcoat for thermal barrier coatings. In the paper the influence of process parameters on the chemical composition and the thickness of aluminide coatings will be presented. The zirconia-doped aluminide coating was deposited on turbine blades made from ZS6K nickel superalloy during the low-activity CVD process. In recent work the influence of turbine blade geometry on thickness of coating was observed. The thickest coating was observed on the trailing and leading edge on the blade cross-section. In the conducted research, the light and scanning electron microscopy were used as well as the EDS chemical composition microanalysis.

You might also be interested in these eBooks

Info:

Periodical:

Solid State Phenomena (Volume 197)

Pages:

58-63

Citation:

Online since:

February 2013

Export:

Price:

Permissions CCC:

Permissions PLS:

Сopyright:

© 2013 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

[1] G.W. Goward, Progress in coatings for gas turbine airfoils, Surf. Coat. Techn. 108-109 (1998) 73-79.

DOI: 10.1016/s0257-8972(98)00667-7

Google Scholar

[2] M.J. Pomeroy, Coatings for gas turbine materials and long term stability issues, Mat. Design 26 (2005) 223-231.

DOI: 10.1016/j.matdes.2004.02.005

Google Scholar

[3] L. Swadzba, G. Nawrat, B. Mendala, M. Goral, The influence of deposition process on structure of platinum-modifed aluminide coatings on Ni-base superalloy, Key Eng. Mater. 465 (2011) 247-250.

DOI: 10.4028/www.scientific.net/kem.465.247

Google Scholar

[4] B. M. Warnes, A.L. Purvis, D.L. Near, Chemical vapor deposition apparatus and method, United States Patent No. US 6, 793, 966 B2 (Sep. 21, 2004).

Google Scholar

[5] B. M. Warnes, Reactive element modified chemical vapor deposition low activity platinum aluminide coatings, Surf. Coat. Techn. 146-147 (2001) 7-12.

DOI: 10.1016/s0257-8972(01)01363-9

Google Scholar

[6] B. M. Warnes, Improved aluminide/MCrAlX coating systems for super alloys using CVD low activity aluminizing, Surf. Coat. Techn. 163-164 (2003) 106-111.

DOI: 10.1016/s0257-8972(02)00602-3

Google Scholar

[7] A. L. Purvis, B.M. Warnes, I.R. McFarren, J.L. Cockerill, Method of forming aluminide diffusion coatings, United States Patent No. US 7, 273, 635 B2 (Sep. 25, 2007).

Google Scholar