论文部分内容阅读
为改善多晶Fe-Ga合金的磁致伸缩性能,在Fe-Ga合金中掺杂稀土Ce、Tb和Dy元素。研究了Fe_(83)Ga_(17)和Fe_(83)Ga_(17)R_(0.6)(R=Ce,Tb,Dy)合金的相结构和磁致伸缩性能。结果表明,Fe_(83)Ga_(17)合金由单一bcc结构Fe(Ga)固溶体相组成,而掺杂稀土后的Fe_(83)Ga_(17)R_(0.6)合金中除保持bcc结构的Fe(Ga)固溶体相外,还出现了R_2Fe_(17)第二相。掺杂稀土后的Fe_(83)Ga_(17)R_(0.6)合金磁致伸缩系数明显大于Fe_(83)Ga_(17)合金。掺杂不同种类的稀土元素对Fe-Ga合金磁致伸缩性能改善的程度不同。在外磁场为557 k A/m时,Fe_(83)Ga_(17)R_(0.6)合金的磁致伸缩系数(206×10~(-6))明显大于Fe_(83)Ga_(17)Tb_(0.6)(165×10~(-6))和FFe_(83)Ga_(17)Dy_(0.6)(161×10~(-6))合金的磁致伸缩系数。
To improve the magnetostrictive properties of polycrystalline Fe-Ga alloys, rare earth Ce, Tb and Dy elements are doped in Fe-Ga alloys. The phase structures and magnetostriction properties of Fe_ (83) Ga_ (17) and Fe_ (83) Ga_ (17) R_ (0.6) (R = Ce, Tb and Dy) alloys were investigated. The results show that the Fe_ (83) Ga_ (17) alloy consists of a single bcc structure Fe (Ga) solid solution phase, while the Fe_ (83) Ga_ (17) (Ga) solid solution phase, also appeared R 2 Fe 17 second phase. The magnetostriction coefficient of rare earth doped Fe_ (83) Ga_ (17) R_ (0.6) alloy is obviously higher than that of Fe_ (83) Ga_ (17) alloy. Doping different types of rare earth elements on the Fe-Ga alloy magnetostrictive properties to improve the degree of difference. The magnetostriction coefficient (206 × 10 -6) of Fe_ (83) Ga_ (17) R_ (0.6) alloy is obviously larger than that of Fe_ (83) Ga_ (17) Tb_ 0.6) (165 × 10 -6) and FFe_ (83) Ga_ (17) Dy_ (0.6) (161 × 10 -6) alloys.