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In situ synchrotron X-ray diffraction study of the sol-gel synthesis of Fe3N and Fe3C

DOI: 10.1021/acs.chemmater.5b01811 DOI Help

Authors: Zoe Schnepp (University of Birmingham) , Ashleigh Danks (University of Birmingham) , Martin Hollamby (Keele University) , Brian Pauw (NIMS) , Claire Murray (Diamond Light Source) , Chiu Tang (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Chemistry of Materials , VOL 27 (14) , PAGES 5094–5099

State: Published (Approved)
Published: July 2015
Diamond Proposal Number(s): 9566

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 depend strongly 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 (Fe3C, 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

Subject Areas: Chemistry


Instruments: I11-High Resolution Powder Diffraction

Added On: 22/06/2015 13:38

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