Surface acoustic wave depth profiling of a functionally graded material

Jozefien Goossens (1) , Philippe Leclaire (1) , Xiaodong Xu (1) , Christ Glorieux (1) , Loïc Martinez (2) , Antonella Sola (3) , Cristina Siligardi (3) , Valeria Cannillo (3) , Tom van Der Donck (4) , Jean-Pierre Celis (4)

1 LATF - Laboratorium voor Akoestiek en Thermische Fysica
2 ECIME - Equipe Circuit Instrumentation et Modélisation Electronique
3 Department of Materials and Environmental Engineering
4 Department MTM

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.

Domaines: Matériaux; Science des matériaux [cond-mat.mtrl-sci]; Acoustique [physics.class-ph]

Jozefien Goossens, Philippe Leclaire, Xiaodong Xu, Christ Glorieux, Loïc Martinez, et al.. Surface acoustic wave depth profiling of a functionally graded material. Journal of Applied Physics, 2007, 102 (5), pp.053508. ⟨10.1063/1.2774002⟩. ⟨hal-01326051⟩