Tb_1-_xDy_x(Fe_1-_yMn_y)_(1.95)合金的磁致伸缩和声学性质及在水声换能器中的应用  

Magnetostriction and Acoustics Properties ofTb1-xDyx(Fe1-yMny)1.95 Alloys and Application to Sonar Transducer

作　　者：杜挺[1] 张洪平[1] 朱厚卿[2] 

机构地区：[1]钢铁研究总院 [2]中国科学院声学所

出　　处：《中国稀土学报》1999年第2期107-110,共4页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金;冶金部稀土办资助项目

摘　　要：研究了Ｔｂ１－ｘＤｙｘ（Ｆｅ１－ｙＭｎｙ）１．９５合金的磁致伸缩、声学等性质及其在水声换能器中的应用。当外加的磁场强度≥８００ｋＡ·ｍ－１时，磁致伸缩系数值在（１３００～１８００）×１０－６范围，有效机电偶合系数值０８４～０９３，声速为２１６８～２８５６ｍ·ｓ－１，杨氏模量为（５０６～７２６）×１０１０Ｎ·ｍ－２；用合金棒材研制水声换能器，该换能器总长３００ｍｍ，总重２ｋｇ，其共振频率为２４ｋＨｚ，发射电流响应１７３ｄＢ，频宽１ｋＨｚ，电声效率４５％The magnetostriction and acoustic properties of Tb1-xDyx(Fe1-yMny)1.95 alloys and application to sonar transducer were studied. The experimental results are as follows: When the applied magnetic field strength 800 kAm-1, the magnetostrictive coefficients are in the range of (13001800)10-6, the electromechanical coupling factors 084093, the sound velocities 21682856 ms-1, and the Youngs Modulus (506726)1010 Nm-2. The alloy rod was applied to construct a sonar transducer, which is 300 mm in length and 2 kg in weight. The characteristics of the sonar transducer are specified resonant frequency 24 kHz, frequency band 1 kHz, current response 173 dB and electroacoustic efficiency 45%.

关 键 词：铽 镝 稀土 磁致伸缩合金 声学性能 水声换能器 

分 类 号：TM274[一般工业技术—材料科学与工程] TB565.1[电气工程—电工理论与新技术]