Porous Metal Backing for High-Temperature Ultrasonic Transducers
Year: 2024
Type: article
Abstract: Improving the performance of high-temperature ultrasonic transducers is a goal of major importance in many industrial applications. To this aim, we propose to use porous metals that support high temperatures as backings. Thus, the acoustic properties of stainless steel and porous stainless steel with porosity of 25% and 35% are determined at ambient temperature and up to 400 °C. Over the temperature range, the longitudinal wave velocity variation is comprised between 5% and 6% in the porous metals. We find that temperature does not significantly affect the attenuation in the material. The pulse-echo response and frequency response of a LiNbO3-based transducer with a porous backing are simulated using a one dimensional electroacoustic model. These simulations, compared to those of a reference transducer, show that the axial resolution with such a design allows these transducers to be used for imaging and/or Non-Destructive Testing and evaluation at high temperature.
Source: Acoustics
Authors: Guy Feuillard, Dang Chi Nguyen, Marc Lethiecq, Mathieu Jean, Frédéric Navacchia
Institutions: Université de Tours, Centre National de la Recherche Scientifique, Institut National des Sciences Appliquées Centre Val de Loire, GREMAN, Matériaux, Microélectronique, Acoustique, Nanotechnologies, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Institut de Recherche sur les Systèmes Nucléaires pour la production d'Energie bas carbone
Language: English
Subfield: Mechanics of Materials
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,819
Funder: California Earthquake Authority
Award: G1763655263
OpenAlex ID: W4362524158