Postdoctoral fellow in crystal growth

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Postdoctoral fellow in crystal growth

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Job description

Offer DescriptionHydrogen embrittlement has been the primary focus of the PI’s group for over a decade. And many works have been performed experimentally as well as numerically at different scales in time and space. The hydrogen embrittlement team has set up the hydrogen embrittlement axis. There were 20 PhD theses supported and completed and 5 are in progress on this topic. This subject is of interest to many industrials who are partners through PhD allocations, post-doc or internships such as Vallourec, IFP renewable energy, Technip, CETIM, EDF, Safran, AREVA, Naval Group, Arcelor … Also, many French government projects ANR were obtained by the team within this scope as well as international collaboration projects (USA, Canada, Japan, Europe). The working group has developed experimental knowledge with innovative test benches with(out) mechanical stresses making it possible to explore the impact of metallurgical heterogeneities on the transport and segregation of hydrogen through experimental measurement. The characterization approach includes electrochemical technics, microscopy, and mechanical. In order to better understand the meaning of experimental values extracted from global flow and / or dosing measurements, we have developed analytical and numerical tools (FEM, ab ignition, DFT) integrating scale transitions.About this project:The Project CZHYMER is an Excellence project allocated by the ANR (French National Research Agency. It consists of the growth of metals using the Czochralski technique to study the effects of hydrogen on selected grain boundaries and triple junctions.Hydrogen is seen as a clean, mobile energy carrier because it has the great advantage of being present on the planet in abundant quantities. Even if the development of a true “hydrogen economy” is now conceivable, many obstacles remain to overcome. In particular, one of the major concerns is that hydrogen can be highly detrimental to the durability of materials. This problem affects structural materials in a variety of industries, from underwater pipelines to aircraft and nuclear reactors or naval industries.This phenomenon, generally referred to as “Hydrogen Embrittlement” (HE), remains one of the most complex damage mechanisms to understand, as it involves processes of hydrogen diffusion and trapping that are still poorly understood.These mechanisms can be affected by metallurgical defects and the heterogeneity of their spatial distribution resulting from the elaboration or pre-deformation of the structure.Therefore, the CzHyMer project aims to understand the interactions between hydrogen and microstructural defects in materials.This study will be carried out using the Czhokralsky Furnace, installed in our laboratory. We will therefore begin by growing and analyzing single crystals to study point and linear defects, followed by bi-crystals to assess the diffusion of the various grain boundaries (surface interface defects). The tri-crystals will give us access to the properties of the various triple junctions that form the volume interface defects present in each material, and finally, the study of polycrystals will encompass all the data from the smallest scales and will enable us to validate the knowledge previously acquiredWhere to apply E-mail[email protected]RequirementsResearch Field Engineering » Chemical engineering Education Level PhD or equivalentResearch Field Engineering » Mechanical engineering Education Level PhD or equivalentResearch Field Physics » Crystal growth Education Level PhD or equivalentResearch Field Physics » Applied physics Education Level PhD or equivalentSkills/Qualifications

• Ph.D. in Mechanical Engineering, Chemical Engineering, Applied Physics, Materials Science
• Strong background and expertise in materials formulation, processing, and characterization, preferably in the area of metals.
• Effective English written and oral communication skills, demonstrated through publications in reputable scientific journals and presentations at conferences.
• Ability to work collaboratively in an interdisciplinary research environment and engage in cross-departmental collaborations.
• High degree of independence and willingness to show great commitment

Additional InformationSelection processContact us by email ( ; ; ) before October 30th with your CV and articles.Work Location(s)Number of offers available 1 Company/Institute Laboratory of Engineering Sciences for the Environment (LaSIE, UMR 7356 CNRS, La Rochelle) Country France City La Rochelle Postal Code 17000 Street Pôle Sciences et Technologie, Avenue Michel Crépeau GeofieldContact CityLa Rochelle WebsiteStreet23 avenue Albert Einstein, BP 33060 Postal Code17031STATUS: EXPIREDShare this page

Expected salary

Location

La Rochelle, Charente-Maritime

Job date

Sat, 12 Oct 2024 02:46:27 GMT

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