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Synthesis and characterization of FeAl nanoparticles by flow-levitation method

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Abstract

The synthesis of high purity intermetallic FeAl nanoparticles using the flow-levitation (FL) method was reported. Iron and aluminium droplets were levitated stably at about 2 230 °C. The morphology, crystal structure and chemical composition of FeAl nanoparticles were investigated by transmission electron microscopy (TEM), high-resolution TEM, X-ray diffraction and energy dispersive spectrometry. The results show that the average particle size of these nanoparticles is about 34.5 nm. Measurements of the d-spacing from X-ray diffraction and electron diffraction studies confirm that the intermetallic nanoparticles have the same crystal structure (B2) as the bulk FeAl. A thin oxidation coating is formed around the particles when being exposed to air. Based on the XPS measurements, the surface coating of the FeAl nanoparticles is composed of Fe2O3 and FeAl2O4. Besides, hysteresis curve reveals that saturation magnetization (M s) of FeAl is 1.66 A/m2, and the coercivity is about 1.214×103 A/m.

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Authors and Affiliations

  1. College of Physical Science and Technology, Yangtze University, Jingzhou, 434023, China

    Shan-jun Chen  (陈善俊) & Yan Chen  (陈艳)

  2. Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, 610065, China

    Shan-jun Chen  (陈善俊), Yong-jian Tang  (唐永建), Jian-jun Wei  (韦建军) & Wei-guo Sun  (孙卫国)

  3. Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, 621900, China

    Shan-jun Chen  (陈善俊), Yan Chen  (陈艳), Yong-jian Tang  (唐永建), Bing-chi Luo  (罗炳池) & Zao Yi  (易早)

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  1. Shan-jun Chen  (陈善俊)
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  2. Yan Chen  (陈艳)
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  3. Yong-jian Tang  (唐永建)
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  4. Bing-chi Luo  (罗炳池)
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  5. Zao Yi  (易早)
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  6. Jian-jun Wei  (韦建军)
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  7. Wei-guo Sun  (孙卫国)
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Correspondence to Shan-jun Chen  (陈善俊).

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Foundation item: Project(10804101) supported by the National Natural Science Foundation of China

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Chen, Sj., Chen, Y., Tang, Yj. et al. Synthesis and characterization of FeAl nanoparticles by flow-levitation method. J. Cent. South Univ. 20, 845–850 (2013). https://doi.org/10.1007/s11771-013-1556-1

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  • DOI: https://doi.org/10.1007/s11771-013-1556-1

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