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Electrical discharge coating of nanostructured TiC-Fe cermets on 304 stainless steel

Algodi, Samer J.; Murray, James W.; Fay, Michael W.; Clare, Adam T.; Brown, Paul D.

Authors

Samer J. Algodi

Michael W. Fay

Adam T. Clare

Paul D. Brown



Abstract

The electrical discharge coating (EDC) process, as used for the development of TiC-Fe cermet coatings on 304 stainless steel, has been investigated as a function of increasing current (2–19 A) and pulse-on time (2–64 μs). Coating morphologies, comprising of a mixture of TiC, γ-Fe, ά-Fe and amorphous carbon, were characterised using the combined techniques of scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffractometry (XRD) and cross-sectional transmission electron microscopy (TEM). The developed coatings exhibited variable hardness values, up to an order of magnitude higher than that of the substrate, depending on the content and dispersion of nanostructured TiC particles within the Fe matrix. Coating hardness was found to increase with increasing current, but decrease under conditions of high pulse-on times, reflecting differences in the amount of TiC incorporated into the coatings. Optimised coatings were achieved using conditions of low processing energy which minimised the development of pores and cracks.

Citation

Algodi, S. J., Murray, J. W., Fay, M. W., Clare, A. T., & Brown, P. D. (in press). Electrical discharge coating of nanostructured TiC-Fe cermets on 304 stainless steel. Surface and Coatings Technology, 307(Part A), https://doi.org/10.1016/j.surfcoat.2016.09.062

Journal Article Type Article
Acceptance Date Sep 26, 2016
Online Publication Date Sep 28, 2016
Deposit Date Dec 8, 2016
Publicly Available Date Dec 8, 2016
Journal Surface and Coatings Technology
Print ISSN 0257-8972
Electronic ISSN 1879-3347
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 307
Issue Part A
DOI https://doi.org/10.1016/j.surfcoat.2016.09.062
Keywords Electrical discharge coating; EDC; EDM; TiC-Fe; Cermet;
Hardness
Public URL http://eprints.nottingham.ac.uk/id/eprint/39239
Publisher URL http://www.sciencedirect.com/science/article/pii/S025789721630946X
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0





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