• Subject: Surface hardening and fatigue behavior of titanium alloys induced by multi-interstitial followed by mechanical surface treatments: effect of property gradient.

    Your tasks:

    • You will perform the surface treatments of the samples and detailed analyses of their microstructures.
    • You will perform cutting-edge techniques for characterizing microstructures, especially by electron microscopy.
    • Your results will be discussed in the framework of materials physics.
    • You will interact with researchers from several countries.
    • You will publish your work in international scientific journals.
    • You will share your time between Metz (France) and Poitiers (France).

    Your profile:

    • You must have a master’s degree in materials physics, passed with high honors.
    • You must have good knowledge of materials physics, crystallography, metallurgy.
    • You have good written and verbal communication skills, and enjoy working in an international team.
    • Good English language skills are required.

    Start date: October 1st 2021

    For further information:

    • Please contact: Prof. Luc PICHON (luc.pichon@univ-poitiers.fr) and Dr. Antoine GUITTON (antoine.guitton@univ-lorraine.fr).
    • The subject is describe in details in the following document: « ApplicationPhD_Pprime_LEM3.pdf »

    Application: https://www.antoine-guitton.fr/?page_id=356


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  • Subject: Modélisation et caractérisation des effets de nano-compliance pour la croissance épitaxiale localisée de GaN sur substrats Si.

    Project:

    In order to decrease the dislocation density induced by the different crystalline structures between the nitride semiconductor layers and the Si substrates they are grown onto, one often uses localised epitaxy methods. However, these result in the formation of other defects arising between the adjacent nucleation centers.  We have developed an original localised epitaxy method by which the crystallites are deposited onto deformable nano-pilars, allowing these crystallites to join without creating any defect. The PhD work we propose aims at a better understanding, for a better control, of the mechanical and thermo-mechanical processes at pla  during this process of nano-pendeo compliant epitaxy. This will be dealt with using finite element models so as to predict the mechanical behaviour of these complex nano-structured systems and by using an ensemble of structural nano-characterization tools for assessing the defect and strain distribution in the materials. From the reduction of defects in the epitaxial layers, we expect to address some of the main issues for a number of important applications related to these nitride materials in the opto- and micro-electronic domains.

    Contacts:

    Guy Feuillet : guy.feuillet@cea.fr / Jesus Zuniga Perez : Jesus.Zuniga.Perez@crhea.cnrs.fr

    Patrice Gergaud : patrice.gergaud@cea.fr / Philippe Vennéguès : Philippe.Vennegues@crhea.cnrs.fr

    For further information please contact the person mentioned above, or download the following document: « Sujet Thèse CHREA-LETI 2021-2024.pdf »


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  • EMPA is looking for a post-doc in the field of: Mechanical properties of ceramic thin films.

    Your tasks:

    You will work on applied research projects funded by InnoSuisse as well as on basic science projects on the small scale mechanical behavior of materials. You will exploit small scale mechanical testing facilities to study deformation and fracture mechanisms of hard ceramic coatings and nanocrystalline ceramics under extreme conditions of temperature and strain rate. You will characterize the microstructure of the deformed and fractured materials using cutting edge analytical techniques such as scanning and transmission electron microscopy. It is intended that all research output from the projects be publishable in peer-reviewed scien-tific journals, and the candidate will be expected to take a lead in the writing process.

    Your profile:

    You must hold a PhD in Materials Science, Physics, Mechanical Engineering, or similar. A high level of motivation to work in close collaboration with industry, experimentalists and an international, multidisciplinary research team is essential. Experience in small scale mechanical testing and/or analytical techniques such as TEM, FIB, XRD, SEM etc. is desirable, as well as in hard coating materials.

    For further information about the position please contact Dr Thomas Edwards  thomas.edwards@empa.ch or Dr Johann Michler, johann.michler@empa.ch .

    Application:

    https://apply.refline.ch/673276/1386/pub/1/index.html


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  • Postdoctoral position at Johns Hopkins, with a designated visiting scholar position at Sandia National Laboratories (NM), focused on in-situ transmission electron microscopy (TEM) experiments and machine learning to investigate radiation damage processes in both pure metals and high entropy alloys.

    The successful applicant will be part of a dynamic, multi-university team which includes both theoretical and experimental personnel. Ideal candidates will have experience with in-situ and high resolution TEM (including aberration correction), electron diffraction, sample fabrication, and defect and microstructural analysis of metallic systems. Experience with image processing, scripting/programming (Python, Matlab, C++) for data processing is preferred, and must be comfortable to travel periodically to Sandia National Laboratories in Albuquerque, NM.

    Application:

    Please apply directly in Interfolio: https://lnkd.in/ezTJz_5.
    Include: cover letter, CV, list of names/contacts of three references, and copies of relevant publications.


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  • Post-doctoral position in in situ and high-resolution STEM characterization of ferroelectric materials

    The Khan Lab and the Kacher Lab jointly are currently looking for a dynamic researcher to aid in the efforts to understand the phase state and switching behavior in novel ferroelectric and anti-ferroelectric materials, nano-structures and nano-devices. Currently, we are accepting applications for a post-doctoral position focused on applying in situ biasing and high-resolution STEM imaging techniques to understand the factors that dictate ferroelectric and anti-ferroelectric behavior. The work will involve in situ S/TEM biasing experiments using probe and chip-based biasing holders in an aberration corrected STEM. The position is available beginning in May 2021 and will continue for one year from hire date, with yearly extensions to a second and third year possible depending on performance and funding.

    Required Qualifications:

    • A Ph.D. in Materials Science and Engineering, Mechanical Engineering, Electrical Engineering, Physics, or a related discipline.
    • Excellence in written and oral communication as evident by a strong publication and presentation track record.
    • Expertise in electron microscopy-based characterization

    Desired Qualifications:

    Strong candidates will have experience in at least some of the following areas:

    • High resolution STEM imaging
    • FIB-based sample preparation

    Interested candidates should send a cover letter, CV including a list of publications and presentations, three potential references with phone numbers and emails included to Prof. Asif Khan (asif.khan@ece.gatech.edu) and Prof. Josh Kacher (josh.kacher@mse.gatech.edu). Reviews of applications will begin immediately and will continue until the position is filled.


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