摘要
系统地研究了铸态和淬火态Fe_(81)(Ga_(1-x)M_x)19(x=0,0．1,0．2,0．3;M=Si,Ge,Sn)合金的相组成和磁致伸缩特性．结果表明:Si,Ge元素分别添加到Fe_(81)Ga_(19)合金中保持了合金的A2相结构．添加少量的Si或Ge(x=0．1)不会降低合金的饱和磁致伸缩值,其中淬火态Fe_(81)(Ga_(0．9)Ge_(0．1))_(19)样品的饱和磁致伸缩值比淬火态Fe_(81)Ga_(19)合金明显提高;此后,继续增加Si或Ge含量,饱和磁致伸缩值显著下降．铸态和淬火态Fe_(81)(Ga_(1-x)Sn_x)_(19)(x=0．1,0．2,0．3)合金为A2和Fesn(Ga)双相结构．随着Sn含量增加．非磁性FeSn(Ga)相数量增加,合金的饱和磁致伸缩值呈降低趋势．其中,在铸态Fe_(81)(Ga_(0．9)Sn_(0．1))_(19)合金中获得了最大的饱和磁致伸缩值(41×10^(-6)),略高于铸态Fe_(81)Ga_(19)合金．
Phase constitutions and magnetostrictions of Fe81（Ga1-xMx）19（x = 0, 0.1, 0.2, 0.3; M = Si, Ge, Sn） alloys were studied. The results indicated that all of Fe-Ga-Si and Fe-Ga-Ge ternary as-cast and quenched states kept a disordered A2 phase structure （Fe81Ga19）. Substitution of Si or Ge for Ga will not noticeably reduce magnetostriction for x=0.1. Wherein, the saturation magnetostriction of quenched Fe81（Ga0.9Ge0.1）19 alloy was much higher than that of quenched Fe81Ga19 alloy. Further increasing Si and Ge contents, the saturation magnetostrictions of Fe81 （Ga1-xMx）19（M = Si, Ge） decrease sharply. The as-cast and quenched Fe81（Ga1-xSnx）19（x=0.1, 0.2, 0.3） comprised FeSn（Ga） phase and A2 matrix. With increasing Sn content, the saturation magnetostrictions of as-cast and quenched Fe-Ga-Sn alloys decreased owing to the appearance of much more non-ferromagnetic FeSn（Ga） phase. The maximum saturation magnetostriction value observed in the as-cast Fe81 （Ga0.9Sn0.1）19 alloys was 41×10^-6, slightly higher than that of the as-cast Fe81Ga19 alloy.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第7期683-687,共5页
Acta Metallurgica Sinica
基金
国家自然科学基金项目50471003
50531010
教育部新世纪优秀人才支持计划项目NCET-04-0165资助~~
关键词
FE-GA合金
元素添加
相结构
磁致伸缩
Fe-Ga alloy, element addition, phase constitution, magnetostriction
