1. Surface acoustic wave depth profiling of a functionally graded material
- Author
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Cristina Siligardi, Valeria Cannillo, Jozefien Goossens, Jean-Pierre Celis, Xiaodong Xu, Tom Van der Donck, Loic Martinez, Philippe Leclaire, Christ Glorieux, Antonella Sola, Laboratorium voor Akoestiek en Thermische Fysica (LATF), Catholic University of Leuven - Katholieke Universiteit Leuven (KU Leuven), Equipe Circuit Instrumentation et Modélisation Electronique (ECIME), Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Ecole Nationale Supérieure de l'Electronique et de ses Applications, Department of Materials and Environmental Engineering, Università degli Studi di Modena e Reggio Emilia (UNIMORE), Department MTM, Ecole Nationale Supérieure de l'Electronique et de ses Applications-Université de Cergy Pontoise (UCP), and Université Paris-Seine-Université Paris-Seine
- Subjects
Materials science ,Scanning electron microscope ,General Physics and Astronomy ,02 engineering and technology ,engineering.material ,01 natural sciences ,Functionally graded material ,[SPI.MAT]Engineering Sciences [physics]/Materials ,symbols.namesake ,Optics ,Coating ,0103 physical sciences ,Microscopy ,Rayleigh wave ,Spectroscopy ,010301 acoustics ,business.industry ,surface acoustic wave ,FGM ,Surface acoustic wave ,Inverse problem ,021001 nanoscience & nanotechnology ,[PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph] ,[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] ,engineering ,symbols ,0210 nano-technology ,business - Abstract
International audience; The potential and limitations of Rayleigh wave spectroscopy to characterize the elastic depth profile of heterogeneous functional gradient materials are investigated by comparing simulations of the surface acoustic wave dispersion curves of different profile-spectrum pairs. This inverse problem is shown to be quite ill posed. The method is then applied to extract information on the depth structure of a glass-ceramic ͑ alumina͒ functionally graded material from experimental data. The surface acoustic wave analysis suggests the presence of a uniform coating region consisting of a mixture of Al2O3 and glass, with a sharp transition between the coating and the substrate. This is confirmed by scanning electron microscope with energy dispersive x-ray analysis.
- Published
- 2007
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