Evolution of hard Fe–C electrodeposits with temperature

Jacob Obitsø Nielsen*, Karen Pantleon

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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The high microhardness of electrodeposited Fe–C coatings with around 800 HV after electrodeposition increased to about 1300 HV by dedicated annealing, reflecting a huge potential for surface engineering. The coatings remain nanocrystalline during annealing, but co-deposited carbon and oxygen result in temperature-induced phase transformations. Energy-dispersive synchrotron diffraction revealed that carbides and oxides form during annealing of the as-deposited coating, which consisted mainly of carbon-free ferrite. The understanding of occurring precipitations was supplemented and verified by in-situ thermal analysis, which revealed the temperatures of thermal events related to decomposition reactions, the evolution of gasses and associated mass changes during annealing.
Original languageEnglish
JournalSurface Engineering
Issue number9
Pages (from-to)960-965
Publication statusPublished - 2020


  • X-ray diffraction (XRD)
  • Coating
  • Nanocrystalline
  • Annealing
  • Phase transformations
  • Electrodeposition
  • Ironcarbon
  • Hardened

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