title: Contactless ultrasonic device to measure surface acoustic wave velocities versus temperature.
abstract: A complete optical experimental setup for generating and detecting surface acoustic waves [Rayleigh waves (RWs)] in metals versus temperature up to the melting point is described. The RWs were excited by a pulsed Nd:YAG laser and detected by a high sensitivity subangstrom heterodyne interferometer. A special furnace was used to heat the sample using infrared radiation with a regulation of the sample temperature less than 0.1 K. First measurements on an aluminum alloy sample are presented to validate the setup.
authors.affiliation: Department de Recherches sur les Matériaux Nucléaires, Centre de Valduc, Commissariat a l'Energie Atomique, F-21120 Is-sur-Tille, France.
authors.forename: C
authors.initials: C
authors.lastname: Hubert
authors.forename: M H
authors.initials: MH
authors.lastname: Nadal
authors.forename: G
authors.initials: G
authors.lastname: Ravel-Chapuis
authors.forename: R
authors.initials: R
authors.lastname: Oltra