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Influence of the substitution of Ni for Fe on the microstructure evolution and magnetic phase transition in La(Fe_1 -χNiχ)_(11.5)Si_(1.5) compounds

机译：Ni替代Fe对La（Fe_1-χNiχ）_（11.5）Si_（1.5）化合物的微观结构演变和磁性相变的影响

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摘要

The influence of Ni substitution on the microstructure evolution and magnetic phase transition has been investigated in La(Fe_(1-χ)Ni_χ)_(11.5)Si_(1.5) (χ = 0, 0.01, 0.02, 0.03) compounds. Results show that partial substitution of Ni for Fe in La(Fe_(1-χ)Niχ)_(11.5)Si_(1.5) (χ = 0, 0.01, 0.02,0.03) alloys promotes fining of the as-cast microstructure. Besides, the formation of 1:13 phase and the elimination of impurity phases is facilitated significantly when annealed at 1373 K for 5 days. Large amounts of inhomogeneities are present in the annealed LaFe_(11.5)Si_(1.5) alloy. While almost single 1:13 phase is obtained in La(Fe_(1-χ)Ni_χ)_(11.5)Si_(1.5) (χ = 0.02, 0.03) alloys. Moreover, the Curie temperature T_c of La(Fe_(1-χ)Ni_χ)_(11.5)Si_(1.5) (χ=0, 0.01, 0.02, 0.03)compounds increase monotonously from 195 K to 219 K when Ni content χ varies from 0 to 0.03.
机译：在La（Fe_（1-χ）Ni_χ）_（11.5）Si_（1.5）（χ= 0、0.01、0.02、0.03）化合物中，研究了Ni替代对微观结构演变和磁相变的影响。结果表明，La（Fe_（1-χ）Niχ）_（11.5）Si_（1.5）（χ= 0，0.01，0.02,0.03）合金中的Ni替代Fe促进了铸态组织的细化。此外，当在1373 K退火5天时，明显促进了1:13相的形成和杂质相的消除。退火的LaFe_（11.5）Si_（1.5）合金中存在大量不均匀性。在La（Fe_（1-χ）Ni_χ）_（11.5）Si_（1.5）（χ= 0.02，0.03）合金中获得了几乎单一的1:13相。此外，当Ni含量χ变化时，La（Fe_（1-χ）Ni_χ）_（11.5）Si_（1.5）（χ= 0，0.01，0.02，0.03）化合物的居里温度T_c从195 K单调增加。从0到0.03。

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  • 来源
    《Materials Science and Engineering》 |2013年第1期|60-64|共5页
  • 作者

    Song Sun; Rongchang Ye; Yi Long;

  • 作者单位

    School of Materials Science and Engineering, University of Science and Technology of Beijing, Beijing 100083. People's Republic of China;

    Corresponding author at: School of Materials Science and Engineering, Univer-sity of Science and Technology of Beijing, Beijing 100083, People's Republic of China;

    School of Materials Science and Engineering, University of Science and Technology of Beijing, Beijing 100083. People's Republic of China;

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  • 正文语种 eng
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  • 关键词

    Ni; Microstructure evolution; Magnetic phase transition; T_c; La(Fe_(1-χ)Ni_χ)_(11.5)Si_(1.5);

    机译：你;微观组织演变;磁性相变;T_c;La（Fe_（1-χ）Ni_χ）_（11.5）Si_（1.5）;

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