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Imaging Ferroic Domain Structures with an Acoustic Microscope: Example of PPLN

Autor: Pierre Saint-Grégoire, F. Augereau, G. Despaux

Publikováno v: Ferroelectrics
Ferroelectrics, Taylor & Francis: STM, Behavioural Science and Public Health Titles, 2003, 290, pp.223-232. ⟨10.1080/00150190390222259⟩

International audience; It is shown that acoustic microscopy at 130 MHz is able to display the domain structure of PPLN samples from the local detection of mechanical properties variations. Specific defocusing settings can improve this detection. Aco

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::df558ca3640f1050f60fde5ee34f73b3
https://doi.org/10.1080/00150190390222259

Non-destructive testing by acoustic signature of damage level in 304L steel samples submitted to rolling, tensile test and thermal annealing treatments

Autor: G. Despaux, L. Robert, V. Roque, F. Augereau

Publikováno v: Materials Science and Engineering: A. 266:285-294

Acoustic signatures are used to detect in a non-destructive way the damage of rolled and drawn plates of 304L stainless steel from measurements of the propagation velocity VR of ultrasonic Rayleigh waves. This parameter is compared with the relative

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::13a68f2bed88785362e4cfff2b8322ca
https://doi.org/10.1016/s0921-5093(98)01092-2

Étude et caractérisation par microscopie acoustique de l’endommagement par fissures

Autor: G. Despaux, J.-M. Saurel, V. Gigot, L. Robert, F. Despetit

Publikováno v: Matériaux & Techniques. 86:21-25

Different non destructive methods of high frequency scanning acoustic microscopy are applied to image both sub-surface and surface microcracks. Spherical acoustic sensors with an aperture of 50° were used working at 50 MHz. and at 570 MHz. Two types

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9b5d682a678a76f05fcc9f82da351027
https://doi.org/10.1051/mattech/199886070021

Ultrasonic in-situ measurement of the marine microlayer

Autor: C.-H. Chou, Butrus T. Khuri-Yakub, L. Robert, C. Cinbis, G. Despaux

Publikováno v: IEEE Symposium on Ultrasonics.

In-situ measurement techniques for the characterization of the marine microlayer have been developed. The approach is based on integrating ultrasonic measurements with a well-accepted microlayer sampler. The sampler is a rotating glass drum that coll

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::57a6b91335dccab0135c2ecca2826e8f
https://doi.org/10.1109/ultsym.1990.171524