【摘 要】
：
The magnetostriction and acoustics properties of Tb1-xDyx(Fe1-yMny)1.95 alloys and their application to sonar transducers were studied. The following results we
【机 构】
：
Central Iron & Steel Research Institute,Institute of Acoustics
论文部分内容阅读
The magnetostriction and acoustics properties of Tb1-xDyx(Fe1-yMny)1.95 alloys and their application to sonar transducers were studied. The following results were obtained from experiments. When the applied magnetic field intensity is ≥800 kA.m-1, the magnetostrictive coefficients are (1300～1800)×10-6. The electromechanical coupling factors are 0.84～0.93, the sound velocities 2168～2856 m·s-1 and the Young′s modulus (5.06～7.26)×1010 N·m-2. A sonar transducer made of the alloy rod, which has a total length of 300 mm and a total weight of 2 kg, is characterized by 2.4 kHz specified resonant frequency, 1 kHz frequency band, 173 kB current response and 45% electroacoustic efficiency.
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