1. Mössbauer Study of Iron Carbides Formed by Thermal Vacuum Deposition.
- Author
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Shokanov, A. K., Vereshchak, M. F., Manakova, I. A., Ozernoy, A. N., Tleubergenov, Zh. K., Bedelbekova, K. A., and Yaskevich, V. I.
- Subjects
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CEMENTITE , *VACUUM deposition , *MOSSBAUER effect , *PHASE equilibrium , *CRYSTAL grain boundaries , *GRAPHITE , *MAGNETRON sputtering , *FERRITES - Abstract
Nanoscale coatings formed by thermal vacuum deposition of metal on an aluminum substrate have been investigated by Mössbauer spectroscopy, X-ray diffraction (XRD) analysis, and electron microscopy. The film coatings have been grown by depositing enriched 57Fe in a magnetron vacuum chamber at a residual atmospheric pressure. It is shown that carbon penetration occurs over grain boundaries and inhomogeneities of interboundary formations, and an amorphous phase is formed during deposition of fine-grained 57Fe. After annealing at a temperature of 500°C, the amorphous structure is crystallized and a monophase (cementite Fе3С) is formed. High-temperature annealing leads to the formation of ferrite α-Fе(C) and graphite due to the decrease in the Fе3С content, according to the equilibrium phase diagram of the Fе–C system. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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