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Mössbauer Study of Iron Carbides Formed by Thermal Vacuum Deposition

Mössbauer Study of Iron Carbides Formed by Thermal Vacuum Deposition 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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Crystallography Reports Springer Journals

Mössbauer Study of Iron Carbides Formed by Thermal Vacuum Deposition

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References (4)

Publisher
Springer Journals
Copyright
Copyright © Pleiades Publishing, Inc. 2020
ISSN
1063-7745
eISSN
1562-689X
DOI
10.1134/S1063774520030323
Publisher site
See Article on Publisher Site

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.

Journal

Crystallography Reports – Springer Journals

Published: May 27, 2020

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