Grégory MARCOS: Metal surface patterning by plasmas – Contribution to societal issues in the field of energy and transport

Abstract:
This manuscript is a synthesis of about twenty years of research in material treatment processes by reactive cold plasmas: dry etching of semiconductors, deposition of self-lubricating thin layers for mechanics, thermochemical treatments of steels for the improvement of tribological properties, patterning of metallic surfaces to obtain new or improved properties. My research strategy consists in trying to make the link between both plasma and surface properties. The studies are carried out according to a multi-scale approach with the aim of achieving a complete description of the process in order to optimize it. Generally, this work is the result of academic and/or industrial collaborations.
In the future, I wish to continue my research on issues related to thermochemical treatments (development/characterization/optimization of the nitriding process by active screen plasma, role of plasma/metal interface), to implement innovative processes introducing cold-spray deposition, to develop my thematic of research relating to metal surfaces patterning. This is in perfect agreement with the societal challenges related to energy and transport.
Finally, I hope that on reading this manuscript, young researchers will be convinced that it is essential to cultivate a collective spirit, the network being a very effective means of getting to know and making themselves known.

Composition of the jury:
> Reporters:
- Angélique BOUSQUET, EC HDR ICCF, Université Clermont Auvergne
- Cécile LANGLADE, Pr LICB, Université de Technologie Belfort Montbéliard
- Luc PICHON, Pprime, Université de Poitiers
> Examiners:
- Corinne CHAMPEAUX, Pr IRCER, Université de Limoges
- Sylvie DESCARTES, IR HDR LMCS, INSA Lyon
- Gérard HENRION, DR CNRS, IJL, Université de Lorraine
- Maxime MIKIKIAN, DR CNRS, GREMI, Université d’Orléans
> Godfather:
- Thierry CZERWIEC, Pr IJL, Université de Lorraine
> Guests:
- Jacky DULCY, IR CNRS
- Pascal LAMESLE, Directeur Scientifique et Technique IRT M2P