MEASUREMENT OF ACOUSTIC PROPERTIES OF MAGNETIC FLUID AND ITS APPLICATION TO NONDESTRUCTIVE EVALUATION

被引：1
|
作者：
IMANO, K
INOUE, H
机构：
[1] Department of Electrical and Electronic Engineering, Mining College, Akita University, Akita
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1994年 / 33卷 / 5B期
关键词：
MAGNETIC FLUID; ULTRASONIC VELOCITY; NONDESTRUCTIVE EVALUATION; ACOUSTIC COUPLING MEDIUM; CHARACTERISTIC ACOUSTIC IMPEDANCE;
D O I：
10.1143/JJAP.33.3208
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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-degrees-C without distinction of frequency. In the frequency range of 4 approximately 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 approximately +/- 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).
引用
收藏
页码：3208 / 3211
页数：4
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