CAJ | 학술논문

采用电弧熔炼法制备了稀土Ce掺杂的 Fe83 Ga17 Ce0．8铸态合金,然后对其进行快淬处理,获得Fe83 Ga17 Ce0．8快淬态合金,最后对 Fe83 Ga17 Ce0．8快淬态合金在1223 K下进行退火热处理5 h.用 X 射线衍射(XRD)、扫描电镜及能谱仪(SEM/EDS)和磁致伸缩测试方法研究了快淬和退火对合金结构和磁致伸缩性能的影响.结果表明,Fe83 Ga17 Ce0．8铸态合金由 bcc结构的Fe(Ga)相和少量的 CeFe2第二相组成.Fe83 Ga17 Ce0．8快淬态合金除了含有大量的 Fe(Ga)相和少量的CeFe2相外,合金中还出现了非对称 DO3结构的 Fe3 Ga相.Fe83 Ga17 Ce0．8快淬态合金经退火热处理后,合金中的CeFe2相转化为贫稀土 Ce2 Fe17相.在外磁场为557 kA/m时,Fe83 Ga17 Ce0．8快淬态合金的磁致伸缩系数(3．82×10－4)明显大于铸态合金(3．56×10－4)和退火态合金(1．82×10－4)的磁致伸缩系数.
채용전호용련법제비료희토Ce참잡적 Fe83 Ga17 Ce0．8주태합금,연후대기진행쾌쉬처리,획득Fe83 Ga17 Ce0．8쾌쉬태합금,최후대 Fe83 Ga17 Ce0．8쾌쉬태합금재1223 K하진행퇴화열처리5 h.용 X 사선연사(XRD)、소묘전경급능보의(SEM/EDS)화자치신축측시방법연구료쾌쉬화퇴화대합금결구화자치신축성능적영향.결과표명,Fe83 Ga17 Ce0．8주태합금유 bcc결구적Fe(Ga)상화소량적 CeFe2제이상조성.Fe83 Ga17 Ce0．8쾌쉬태합금제료함유대량적 Fe(Ga)상화소량적CeFe2상외,합금중환출현료비대칭 DO3결구적 Fe3 Ga상.Fe83 Ga17 Ce0．8쾌쉬태합금경퇴화열처리후,합금중적CeFe2상전화위빈희토 Ce2 Fe17상.재외자장위557 kA/m시,Fe83 Ga17 Ce0．8쾌쉬태합금적자치신축계수(3．82×10－4)명현대우주태합금(3．56×10－4)화퇴화태합금(1．82×10－4)적자치신축계수.
Rare earth Ce doped Fe83 Ga17 Ce0.8 as-cast alloy was prepared by non-consumable vacuum arc melting furnace using high purity elements under a protective argon atmosphere and then rapidly quenched at 6 m/s.Fi-nally,the Fe83 Ga17 Ce0.8 quenched alloy was annealed at 1 223 K for 5 h.The effects of rapid quenching and an-nealing on structure and magnetostriction property of Fe83 Ga17 Ce0.8 alloys were investigated by means of X-ray diffraction (XRD),scanning electron microscopy (SEM),energy dispersive spectrometry (EDS)and magneto-striction measurements,respectively.The results showed that the Fe83 Ga17 Ce0.8 as-cast alloy was composed of the Fe(Ga)solid solution phase with bcc structure and a small amount of CeFe2 secondary phase.However,the Fe83 Ga17 Ce0.8 quenched alloy was mainly composed of the Fe(Ga)solid solution phase with bcc structure,a small amount of CeFe2 and unsymmetrical Fe3 Ga phase with DO3 structure.After annealing,the CeFe2 phase of quenched alloy was conversed into Ce-poor rare earth phase of Ce2 Fe17 .The magnetostriction coefficient of quenched Fe83Ga17Ce0.8 alloy (3.82×10-4)was larger than that of the as-cast Fe83Ga17Ce0.8 alloy (3.56×10-4) and annealed Fe83Ga17Ce0.8 alloy (1.82×10-4)at the magnetic field of 557 kA/m.