A study on the surface chemistry of laser textured parts

Escudero Ornelas, Aland, Davey, E, Valera Medina, Agustin ORCID: https://orcid.org/0000-0003-1580-7133, Bigot, Samuel ORCID: https://orcid.org/0000-0002-0789-4727 and Bhaduri, Debajyoti ORCID: https://orcid.org/0000-0002-8270-388X 2024. A study on the surface chemistry of laser textured parts. Presented at: Cardiff University Engineering Research Conference 2023, Cardiff, UK, 12-14 July 2023. Published in: Spezi, Emiliano and Bray, Michaela eds. Proceedings of the Cardiff University Engineering Research Conference 2023. Cardiff: Cardiff University Press, pp. 128-132. 10.18573/conf1.ad

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Abstract

The research investigates the changes in the surface properties and surface chemistry following laser microtexturing of stainless steel parts, in relation to their applications in the energy sector. In particular, the material compositions of the laser surface textured (LST) parts, together with the oxide compound formation on them are evaluated with respect to their wettability property. Wettability is crucial for heat exchange processes as it affects the efficiency of heat transfer by influencing surface contact and the formation of droplets on the heat exchanger surface. Here, two simple LST geometries, viz. channel and cross-hatch, were produced using a nanosecond fibre laser micromachining system. The wettability of the textured surfaces was then examined over a period of 45 days with an interval of 15 days. It was observed that the former geometry rendered a hydrophilic surface initially, which transformed to a hydrophobic surface after 45 days, whereas the latter LST design exhibited hydrophobic characteristic over the entire duration of the assessment. The material compositions and the oxide compound formation on the LST parts were analysed via energy dispersive spectroscopy, X-ray photoelectron spectroscopy and X-ray diffraction techniques and the results were correlated with the measured wettability data.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Publication
Status:	Published
Schools:	Engineering
Subjects:	Q Science > QD Chemistry T Technology > TA Engineering (General). Civil engineering (General) T Technology > TJ Mechanical engineering and machinery T Technology > TP Chemical technology T Technology > TS Manufactures
Additional Information:	Contents are extended abstracts of papers, not full papers
Publisher:	Cardiff University Press
ISBN:	978-1-9116-5349-3
Funders:	Mexican National Council on Science and Technology (CONACYT)
Date of First Compliant Deposit:	10 June 2024
Date of Acceptance:	2024
Last Modified:	30 Jul 2024 08:01
URI:	https://orca.cardiff.ac.uk/id/eprint/169699

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