Technique for measuring ultrasonic velocity and attenuation changes in attenuative materials at temperature such as during sintering processes

Autor:	Harold M. Frost, John H. Gieske
Rok vydání:	1991
Předmět:	Fabrication Materials science Brillouin scattering visual_art Acoustics Attenuation visual_art.visual_art_medium Varistor Waveform Sintering Resonance Ceramic Instrumentation
Zdroj:	Review of Scientific Instruments. 62:3056-3060
ISSN:	1089-7623 0034-6748
DOI:	10.1063/1.1142153
Popis:	This paper describes a PC‐based automatic measuring system for ultrasonic velocity and attenuation changes in highly attenuating green‐body ceramics during sintering temperatures. The system uses pulse‐echo/through‐transmission buffer rod technique and records pulse‐echo and through‐transmission waveforms at programmed time or temperature intervals. Data can be taken without interruption during temperature schedules lasting many days. Archival files of the waveform data are saved on disks for later analysis. Accuracy of the technique is demonstrated for solid fused silica for which dynamic resonance and Brillouin scattering data of the longitudinal velocity are compared at temperatures up to 1200 °C. The system has been used successfully for measuring longitudinal velocity and attenuation changes at 5 MHz during sintering of ZnO‐based varistor materials and YBa2Cu3Ox superconducting ceramics.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8a73a649712fe5b10a302cb398294a56 https://doi.org/10.1063/1.1142153 Zobrazit plný text záznamu