Paper Titles

Electron-Probe Microanalysis: Some Revelations in the Investigation of Defects in Steel Products
p.627

Certified Reference Materials for the Characterisation of Multifunctional Materials
p.635

Stress Relaxation on Polished Cross-Sections of Al₂O₃/ZrO₂ FGM Discs Measured by Raman Spectroscopy
p.641

Experimental Characterization and Computational Simulation of Glass-Alumina Functionally Graded Surfaces
p.647

Determining the Elastic Moduli of the Individual Component Layers of Cylindrical Thermal Barrier Coatings by Means of a Mixed Numerical - Experimental Technique
p.653

Polyimide Surface Modification by Low Energy Ion Beam Irradiation
p.659

Microstructure of Al₂O₃-Fe FGM Obtained by Modified Slip-Casting Method
p.665

Layered Boron Carbide-Aluminum Composites with Large Changes in Microstructure
p.673

Steel Parts with Tailored Material Gradients by 3D-Printing Using Nano-Particulate Ink
p.679

HomeMaterials Science ForumMaterials Science Forum Vols. 492-493Determining the Elastic Moduli of the Individual...

Determining the Elastic Moduli of the Individual Component Layers of Cylindrical Thermal Barrier Coatings by Means of a Mixed Numerical - Experimental Technique

Article Preview

Abstract:

Cylindrical specimens made of the Ni-based super-alloy Inconel 625 (IN 625) were coated with (a) NiCoCrAlY, or (b) NiCoCrAlY and yttria-stabilised zirconia (YSZ: in this case, zirconia with 7-8 wt% yttria), using the electron beam - physical vapor deposition (EB-PVD) technique. In the bi-layer coatings, the YSZ layer is the thermal barrier coating (TBC) and the NiCoCrAlY layer is the metallic bond coat (BC). The BC improves the bonding between the substrate and the ceramic TBC, while the low thermal conductivity of the TBC oers high-temperature protection to the substrate. This paper focuses on the determination of the elastic moduli of the substrate and the coating layers of the test samples. The elastic moduli of the three dierent materials (IN 625, NiCoCrAlY and YSZ) were determined by means of a mixed numerical - experimental technique (MNET). The employed MNET was based on the comparison of the experimentally measured resonant frequencies of the rst bending mode of the test samples to the numerically calculated ones. The unknown elastic properties were determined by ne-tuning the elastic material parameters of the numerical models so as to enable the reproduction of the experimentally measured resonant frequencies.

You might also be interested in these eBooks

Functionally Graded Materials VIII

Info:

Periodical:

Materials Science Forum (Volumes 492-493)

Pages:

653-658

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.492-493.653

Citation:

Cite this paper

Online since:

August 2005

Authors:

T. Lauwagie, K. Lambrinou, Iulian Mircea, Marion Bartsch, W. Heylen, Omer Van der Biest

Keywords:

Elastic Modulus, Impulse Excitation, Thermal Barrier Coating (TBC)

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2005 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

[1] F. F¨orster: Z. Metallkd., Vol. 29, pp.109-115, (1937).

[2] G. Pickett: Proceedings ASTM, Vol. 45, pp.846-865, (1945).

[3] S. Spinner and W. E. Teft: Proceedings ASTM, 61, 1221, (1961).

[4] ASTM C 1259-98, (1999).

[5] H. Sol: Ph.D. Thesis, Vrije Universiteit Brussel, Belgium, (1986).

[6] T. Lauwagie, W. Heylen, H. Sol and G. Roebben: Journal of Sound and Vibration, Vol. 274, Issues 3-5, pp.529-546, (2004).

DOI: 10.1016/j.jsv.2003.05.023

[7] G. Marci and M. Bartsch: Proceedings of the DVM Conference Werkstoffpr¨ufung, p.271, (1999).