Measurement of ultrasonic attenuation in magnetic fluid and its application to surface profiling

Kazuhiko Imano, Hiroshi Inoue

    Research output: Contribution to journalArticle

    4 Citations (Scopus)

    Abstract

    The measurement of ultrasonic attenuation in a magnetic fluid (MF) is carried out to investigate the properties of frequency and magnetic field dependence in an ultrasonic propagation medium. The reference method for the ultrasonic attenuation measurement is explained and is executed by a pulse reflection system in the frequency range from 1 to 15 MHz. The magnetic field dependence of attenuation in a MF is measured with a pulse transmission system at a field strength from 0 to 0.2 T. Experimental results show that: 1) the attenuation constant divided by the frequency squared, α/f2, is almost constant (0.5 × 10-15 s2/cm) Over a frequency of 3.5 MHz. 2) Relative changes in attenuation, Δα, in the magnetic field are less than 2 dB over the frequency range from 1 to 15 MHz. Surface topographical profiling of drilled holes in an aluminum plate is carried out to demonstrate the usefulness of a MF as an ultrasonic propagation medium.

    Original languageEnglish
    Pages (from-to)3188-3191
    Number of pages4
    JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
    Volume36
    Issue number5 SUPPL. B
    DOIs
    Publication statusPublished - 1997 May

    Keywords

    • Attenuation
    • Magnetic fluid
    • Reference method
    • Surface profiling
    • UNDE
    • Ultrasonic propagation medium

    ASJC Scopus subject areas

    • Engineering(all)
    • Physics and Astronomy(all)

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