Distribution of Iron Atoms in Nonequivalent Crystallographic Sites of Fe7C3 Carbide in Core–Shell Nanostructures
- 作者: Baskakov A.1, Starchikov S.1, Lyubutin I.1, Ogarkova Y.1, Davydov V.2, Kulikova L.2, Egorova T.3, Agafonov V.4, Starchikova I.5
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隶属关系:
- Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,” Russian Academy of Sciences
- Institute of High-Pressure Physics, Russian Academy of Sciences
- Moscow State University
- Université François-Rabelais
- Moscow Aviation Institute (National Research University)
- 期: 卷 64, 编号 2 (2019)
- 页面: 331-336
- 栏目: Nanomaterials and Ceramics
- URL: https://journals.rcsi.science/1063-7745/article/view/193871
- DOI: https://doi.org/10.1134/S1063774519020056
- ID: 193871
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详细
The structure and magnetic properties of iron carbide nanoparticles encapsulated into carbon shells, obtained as a result of ferrocene transformations at a pressure of 8 GPa and different temperatures, have been investigated by powder X-ray diffraction, transmission electron microscopy, and Mössbauer spectroscopy. It is found that the main crystalline carbide states are hexagonal phase Fe7C3 and cementite Fe3C, whose relative contents are determined by the treatment temperature. Mössbauer spectroscopy was used to identify three nonequivalent states of iron atoms in the structural sites of Fe7C3 hexagonal lattice. It is established that the occupancies of these sites differ from the known values for the bulk material, which is related to the specific features of structure formation under conditions of high pressure and temperature.
作者简介
A. Baskakov
Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,”Russian Academy of Sciences
编辑信件的主要联系方式.
Email: arseniybaskakov@gmail.com
俄罗斯联邦, Moscow, 119333
S. Starchikov
Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,”Russian Academy of Sciences
Email: arseniybaskakov@gmail.com
俄罗斯联邦, Moscow, 119333
I. Lyubutin
Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,”Russian Academy of Sciences
Email: arseniybaskakov@gmail.com
俄罗斯联邦, Moscow, 119333
Yu. Ogarkova
Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,”Russian Academy of Sciences
Email: arseniybaskakov@gmail.com
俄罗斯联邦, Moscow, 119333
V. Davydov
Institute of High-Pressure Physics, Russian Academy of Sciences
Email: arseniybaskakov@gmail.com
俄罗斯联邦, Troitsk, Moscow oblast, 142190
L. Kulikova
Institute of High-Pressure Physics, Russian Academy of Sciences
Email: arseniybaskakov@gmail.com
俄罗斯联邦, Troitsk, Moscow oblast, 142190
T. Egorova
Moscow State University
Email: arseniybaskakov@gmail.com
俄罗斯联邦, Moscow
V. Agafonov
Université François-Rabelais
Email: arseniybaskakov@gmail.com
法国, Tours, 37000
I. Starchikova
Moscow Aviation Institute (National Research University)
Email: arseniybaskakov@gmail.com
俄罗斯联邦, Moscow, 125993