Combined Surface Hardening and Laser Patterning Approach for Functionalising Stainless Steel Surfaces

Antonio Garcia Giron*, Jean-Michel Romano, Yana Liang, Behnam Dashtbozorg, Hanshan Dong, Pavel Penchev, Stefan Dimov

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)
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The paper reports a laser patterning method for producing surfaces with dual scale topographies on ferritic stainless steel plates that are hardened by low temperature plasma surface alloying. Nitrogen and carbon based gasses were used in the alloying process to obtain surface layers with an increased hardness from 172 HV to 1001 HV and 305 HV, respectively. Then, a nanosecond infrared laser was used to pattern the plasma treated surfaces and thus to obtain super-hydrophobicity, by creating cell- or channel-like surface structures. The combined surface hardening and laser patterning approach allowed super-hydrophobic surfaces to be produced on both nitrided and carburised stainless steel plates with effective contact angles higher than 1500. The hardened layers on nitrided samples had cracks and was delaminated after the laser patterning while on plasma carburised samples remained intact. The results showed that by applying the proposed combined approach it is possible to retain the higher hardness of the nitrided stainless steel plates and at the same time to functionalise them to obtain super-hydrophobic properties.
Original languageEnglish
Pages (from-to)516-524
Number of pages9
JournalApplied Surface Science
Early online date8 Jan 2018
Publication statusPublished - 1 May 2018


  • laser patterning
  • nanosecond laser
  • hydrophobicity
  • plasma surface alloying
  • hardening
  • surface engineering


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