Interface characterization at nanometer scale using very high frequency ultrasounds

Hilal Reda (1, 2) , Julien Carlier (1, 2) , Malika Toubal (2) , Pierre Campistron (1, 2) , Pascal Tilmant (3) , Bertrand Nongaillard (1, 2)

1 MAMINA - IEMN - Matériaux et Acoustiques pour MIcro et NAno systèmes intégrés - IEMN
2 IEMN-DOAE - Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520
3 IEMN - Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520

The main objective of this work is to study the solid-solid interfaces using a very high frequency (3GHz) ultrasonic method in order to deduce in a non-destructive way and quantitatively the quality contact at the interface, fundamental parameter in tribology. The very high frequencies allow prospecting the state of contact at the nanometer scale. The determination of the contact surface between two polished materials (Silicon-Silica) was carried out. From the measured echoes diagram, the reflection coefficient and the elasticity of the interface were extracted and compared to the ones determined by a numerical approach presented by Greenwood and Williamson

Domaines: Sciences de l'ingénieur [physics]; Optique / photonique; Acoustique [physics.class-ph]

Hilal Reda, Julien Carlier, Malika Toubal, Pierre Campistron, Pascal Tilmant, et al.. Interface characterization at nanometer scale using very high frequency ultrasounds. Composite Interfaces , 2019, 26 (4), pp.325-337. ⟨10.1080/09276440.2018.1500205⟩. ⟨hal-03142272⟩