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采用电弧炉熔炼方法得到Fe82Ga18-xAlx(x=3,9,12)合金的多晶样品。利用X射线衍射(XRD)和金相观察对合金的相组成进行分析,并对其磁致伸缩系数进行测量。经过真空磁场热处理后,对Fe-Ga-Al合金的结构和磁致伸缩性能进行研究。结果表明,真空磁场热处理后Fe-Ga-Al合金磁致伸缩系数均有提高,其中Fe82Ga9Al9合金经磁场热处理后,磁致伸缩达到114×10-6;Fe82Ga15Al3合金经磁场热处理后,其磁致伸缩增幅最大,比处理前增加165%。
Polycrystalline samples of Fe82Ga18-xAlx (x = 3,9,12) alloy were obtained by electric arc furnace melting. The phase composition of the alloy was analyzed by X-ray diffraction (XRD) and metallographic observation, and its magnetostriction coefficient was measured. After vacuum magnetic field heat treatment, the structure and magnetostrictive properties of Fe-Ga-Al alloy were studied. The results show that the magnetostriction coefficient of the Fe-Ga-Al alloy increases after vacuum magnetic field heat treatment. The magnetostriction of the Fe82Ga9Al9 alloy reaches 114 × 10-6 after magnetic field heat treatment. After the magnetic field heat treatment, the magnetostriction The largest increase was 165% more than before the treatment.