采用铜模喷铸法,制备Fe100-xGax(x=15, 19, 23, 27.5, 30)合金.实验结果表明铜模喷铸有利于改善低Ga (15≤x<23) Fe100-xGax合金的磁致伸缩,却大幅降低了高Ga(23≤x≤30) Fe100-xGax合金的磁致伸缩.以Fe81Ga19和Fe72.5Ga27.5合金为例,喷铸态Fe81Ga19样品的饱和磁致伸缩比800 ℃淬火态提高了7%;而喷铸态Fe72.5Ga27.5样品的饱和磁致伸缩为6.1×10-5,仅是800 ℃淬火态的60.4%.此外,淬火态Fe72.5Ga27.5样品的饱和磁化强度为131.21 A·m2·kg-1,也高于喷铸态(126.21 A·m2·kg-1).
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