Centre des Matériaux
Pierre-Marie Fourt
Pierre-Marie Fourt
Lecture
Bio-based aerogels: new eco-friendly porous materials for thermal insulation and controlled release
| Area of expertise | Materials science and engineering |
| Doctoral School | ISMME - Systems Engineering, Materials, Mechanics, Energy |
| Supervisor | M. Siegfried FOUVRY |
| Co-supervisor | M. Yazid MADI |
| Research unit | Centre of materials |
| Starting date | October 1st 2025 |
| Keywords | Fretting Wear, Hydrogen, Modelling, Experimentations, Simulations |
| Abstract | The ecological transition will, in the long term, involve a massive use of hydrogen as a vector for decarbonized energy. This will require the establishment of an industry specifically dedicated to applications involving the transport, storage, and management of gaseous hydrogen flows under high pressure (300 to 600 bars) (industry, aviation, road and rail transport). Unfortunately, hydrogen, by diffusing into metallic materials, can lead to their embrittlement or even failure. While the phenomenon of hydrogen embrittlement (HE) is increasingly well studied in the context of material fracture and fatigue, the effects on friction and wear remain poorly understood. The objective of this research thesis, which combines experimental and simulation approaches, is to address this scientific challenge. Equipped with a unique facility worldwide (a tribological test rig — fretting — operating in high-pressure gas at the CDM), the student will conduct experimental research aimed at quantifying the evolution of friction and wear as a function of tribological loading conditions (normal force, sliding amplitude, frequency) and the partial pressure of hydrogen (5 to 250 bars). The study will focus on two metallic alloys (TA6V and 316L) that exhibit very different reactivity to hydrogen, in order to highlight the influence of microstructure on hydrogen-induced degradation processes. This experimental analysis will be complemented by advanced characterization techniques (LTDS-CDM) (SEM, EDX, 3D profilometry, EBSD, micro-Raman, nano-hardness) to establish damage scenarios. Once the wear processes are formalized, a modeling framework will be developed. This will involve coupling a wear simulation using the ABAQUS 'Wear Box' with a 'HELP' code to simulate hydrogen diffusion processes under the effect of plastic deformations generated beneath the interface, thereby accounting for HE phenomena in the wear kinetics. Based on this highly innovative model in the field of tribology, the aim will be to simulate experimental wear kinetics while incorporating all relevant loading conditions (mechanical and environmental). |
| Profile | Typical profile for a thesis at MINES ParisTech: Engineer and / or Master of Science - Good level of general and scientific culture. Good level of knowledge of French (B2 level in french is required) and English. (B2 level in english is required) Good analytical, synthesis, innovation and communication skills. Qualities of adaptability and creativity. Teaching skills. Motivation for research activity. Coherent professional project. Prerequisite (specific skills for this thesis): Applicants should supply the following : • a detailed resume • a copy of the identity card or passport • a covering letter explaining the applicant’s motivation for the position • detailed exam results • two references : the name and contact details of at least two people who could be contacted • to provide an appreciation of the candidate • Your notes of M1, M2 • level of English equivalent TOEIC to be sent to recrutement_these@mat.mines-paristech.fr |
| Funding | ANR Financement d'Agences de financement de la recherche |
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