36 mois (36 months)

PhD project : PolyAmide resistance to damage cumulation from high-pressure hydrogen cycling and fatigue loading

[TheChamp-Sharing]
This PhD project, mainly experimental, focuses on PA11, a semi-crystalline thermoplastic used for the hoses of hydrogen refueling stations. The aim is to better understand the cross-dependence of two co-existing sources of damage (mechanical fatigue and repeated fast decompressions after exposure to high-pressure hydrogen) on micro-mechanisms and on their consequences on the residual mechanical properties and permeability. The PhD is part of an ANR (French National Research Agency) project. It will be prepared at Institut Pprime (Poitiers, France), in close collaboration with Hydrogenius laboratory (University of Kyushu, Japan), and will benefit from the feedback of Arkema (France and Japan) about industrial service conditions and specifications.
Sylvie CASTAGNET - Contacter
ISAE-ENSMA
1, Avenue Clément Ader
Téléport 2
BP 40109
86961 FUTUROSCOPE CHASSENEUIL
FRANCE

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12 Mois

Instability development at the interface of viscous heterocharged fluids

The proposed studies will relate to a low Reynolds laminar flow of a two-dimensional mixture layer of a highly viscous dielectric fluid. The fluid / fluid interface will be studied experimentally under different conditions. This subject is part of action 5.1 of the INTERACTIVES labex, action which concerns the manipulation of internal flow by electrical discharge and charge injection.

5 to 6 months

Master 2 internship -Filled- Multi-interstitials compounds: a new way in surface properties optimization of Titanium alloys

This position is filled. The proposed internship will focus on the determination of the diffusion parameters involved in the treatment of (pure) Titanium and the TA6V alloy. Oxi-nitriding treatments with gas enriched with 18O and 15N isotopes will be operated the plasma assisted thermochemical treatment reactor of the Physics and Mechanics Department (DPMM) of the P’ Institute. Various parameters will be investigated such as the microstructure of the modified surface, the crystallographic structure, the characterization of the isotopes profiles of the dedicated samples and the determination of the diffusion mechanisms. The applicant is expected to have motivation and skills in experimental characterization of materials and surfaces.