%0 Journal Article
%T ELECTROMECHANICAL COUPLING COEFFICIENT (K33) of A Fe-Ga MAGNETOSTRICTIVE ALLOY<br>Fe81Ga19磁致伸缩合金的动态机电耦合系数
%A BAI Xiabing
%A JIANG Chengbao
%A GONG Shengkai
%A <br>白夏冰
%A 蒋成保
%A 宫声凯
%J 金属学报
%D 2007
%I 
%X Fe81Ga19 magnetostrictive oriented crystalline have been prepared by zone melting unidirectional solidification. Vacuum annealing at 900°C for 3h has been carried out followed by oil quenching. The electromechanical coupling coefficient (k33) is determined by the impedance resonance frequency tested using AC impedance instrument. With the increase of DC magnetic field, K33 is increased appreciably with the value of 0.126 for 327Oe, 0.129 for 481Oe and 0.133 for 636Oe. Respectively with the increase of stress from 0MPa to 15MPa, K33 remains unchanged in 327Oe, but in 636Oe K33 is increased obviously. Heat treatment at 900°C for 3h followed by oil quenching, K33 is improved with the value of 0.157 in 636Oe magnetic field and 15Mpa stress. Surface quality of sample affects the AC impedance curve and it is hard to measure the K33 of defective sample.
%K Fe_(81)Ga_(19)
%K giant magnetostrictive material
%K electromechanical coupling coefficient (K_(33))
%K AC impedance<br>Fe81Ga19
%K 磁致伸缩材料
%K 机电耦合系数(K33)
%K 交流阻抗曲线
%K 磁致伸缩
%K 合金
%K 动态
%K 机电耦合系数
%K COUPLING
%K COEFFICIENT
%K ELECTROMECHANICAL
%K ALLOY
%K 存在
%K 影响
%K 阻抗曲线
%K 交流阻抗
%K 表面缺陷
%K 样品
%K 真空热处理
%K 关系
%K 应力变化
%K 条件
%K 磁场强度
%K 压力
%K 结果
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=874A1CE7C8235F7F3B624CDE537E711C&yid=A732AF04DDA03BB3&vid=BE33CC7147FEFCA4&iid=E158A972A605785F&sid=09AA1448D1EAF9C1&eid=1FF3CD54EFC256A1&journal_id=0412-1961&journal_name=金属学报&referenced_num=0&reference_num=12