In Situ Synchrotron X-ray Diffraction Study of the Sol-Gel Synthesis of Fe<inf>3</inf>N and Fe<inf>3</inf>C

Research output: Contribution to journalArticlepeer-review

Authors

  • Ashleigh E. Danks
  • Martin J. Hollamby
  • Brian R. Pauw
  • Claire A. Murray
  • Chiu C. Tang

Colleges, School and Institutes

External organisations

  • Keele University
  • National Institute for Materials Science Tsukuba
  • Diamond Light Source

Abstract

Sol-gel chemistry is a powerful tool for the synthesis of porous or nanocrystalline structures of a wide range of materials. The morphology and composition of the final product can be strongly dependent on the mechanism that operates during the heating step, as has been demonstrated in many investigations of binary, ternary, and quaternary metal oxides. We demonstrate the complex phase transformations occurring in a transition-metal carbide (Fe<inf>3</inf>C, cementite) synthesis using in situ synchrotron X-ray diffraction. Our new study proves the existence of multiple intermediate phases and elucidates how oxide-nitride and nitride-carbide phase transformations can occur. This is particularly important as many transition-metal nitrides and carbides are metastable, which renders their stability windows sensitive to small changes in sol-gel methodology.

Details

Original languageEnglish
Pages (from-to)5094-5099
Number of pages6
JournalChemistry of Materials
Volume27
Issue number14
Publication statusPublished - 28 Jul 2015