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
Externally publishedYes

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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