Measurement of acoustic properties of magnetic fluid and its application to nondestructive evaluation

Kazuhiko Imano, Hiroshi Inoue

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)

    Abstract

    The ultrasonic velocity in a magnetic fluid (MF) on a base of water is measured under different temperatures, frequencies and magnetic fields. Two Kinds of ultrasonic correlation systems are employed. The maximum velocity is observed at 38°C without distinction of frequency. In the frequency range of 4∼10 MHz, a weak frequency dependence of ultrasonic velocity of 1∼2 m/s is observed. Dependence of external magnetic field in the magnetic field strength of 0∼±0.2 T is on the order of 10-4. An experiment with a magnetic fluid as an acoustic coupling medium is performed to demonstrate its usefulness in ultrasonic nondestructive evaluation (UNDE).

    Original languageEnglish
    Pages (from-to)3208-3211
    Number of pages4
    JournalJapanese journal of applied physics
    Volume33
    Issue number5S
    DOIs
    Publication statusPublished - 1994 May

    Keywords

    • Acoustic coupling medium
    • Acoustic impedanc
    • Characteristic
    • Magnetic fluid
    • Nondestructive evaluation
    • Ultrasonic velocity

    ASJC Scopus subject areas

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

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