摘要
采用粘结法制备了Sm_(1-x)Dy_xFe_2合金样品,测量了粘结合金样品的静态磁致伸缩、动态磁致伸缩系数、增量磁导率和磁-机械耦合系数,研究了磁致伸缩性能等随磁场H的变化规律。发现当x<0.12时合金的低场磁致伸缩随x的增加而增加,高场磁致伸缩随x的增加而降低。棒状Sm_(0.88)Dy_(0.12)Fe_2合金在H=200kA/m时的磁致伸缩达405×10^(-6),磁-机械耦合系数和动态磁致伸缩系数分别达到0.34和1.28nm/A,因而粘结Sm_(0.88)Dy_(0.12)Fe_2合金具有一定的实用价值。
The epoxy bonded Sm_(1-x)D_(yx)Fe_2 composites were prepared. The magnetostriction, dynamic magnetostrictive coefficient and coupling coefficient of the epoxy bonded composites were measured and the magnetic field dependence of magnetostrictive properties was investigated. It is found that the magnetostriction of epoxy bonded Sm_(1-x)Dy_xFe_2 composites increases with increasing x in low magnetic fields, but it goes the opposite way in high magnetic fields. The magnetostriction of Sm_(0. 88)Dy_(0.12)Fe_2 rod sample is 405 x 10^(-6) at the field of 200 kA/m. The maximum values of magneto - mechanical coupling coefficient and dynamic magnetostrictive coefficient are 0.34 and 1.28nm/A, respectively. Therefore, epoxy bonded Sm_(0.88)Dy_(0.12)Fe_2 composite is a valuable material for practical application.
出处
《功能材料与器件学报》
CAS
CSCD
2004年第2期191-194,共4页
Journal of Functional Materials and Devices
基金
河北省自然科学基金(501027
503055)
河北省普通高等学校博士科研资助基金
关键词
稀土-铁合金
粘结工艺
磁致伸缩
磁机械耦合
rare earth-iron alloy
bonded technology
magnetostiction
magnetomechanical coupling
