Automation of The Characterization of Crystalline - Metz, France - Laboratoire d'Étude des Microstructures et de Mécanique des Matériaux

Description

Réf
-
ABG-111273

• Sujet de Thèse 18/02/2023
• Financement de l'Union européenne
• Laboratoire d'Étude des Microstructures et de Mécanique des Matériaux
• Lieu de travail
• Metz
• Grand Est
• France
• Intitulé du sujet
• Champs scientifiques
• Matériaux
• Matériaux
• Physique

• Mots clés

• Contrast modeling and computer vision for microstructural defect characterizations
  Description du sujet:

Description of the doctoral work:

• The doctoral researcher will be a part of the local team for the HORIZON project AddMorePower (Advanced modeling and characterization for power semiconductor materials and technologies), which is funded up to 6 M€ over 48 months by the European Commission.
• The goal of AddMorePower is to advance xray and electron probe related characterization techniques, making them quantitative and automated tools for the power semiconductor industry. Additionally, the project aims to refine modeling and data management methods to enhance and efficiently use characterization data. This will promote the integration and development of European power semiconductor technologies, allowing for a broader and faster market penetration, while also providing new opportunities for other industries that rely on mono

- and poly-crystalline materials.

• Scanning Electron Microscopy (SEM) can generally be used to characterize microstructural defects in crystalline materials. Electron Channeling Contrast Imaging (ECCI) allows for the direct observation of crystal defects, such as dislocations in the subsurface (approximately 100 nm deep) of bulk materials [1]. This emerging SEM technique has the potential to identify contrast changes at the surface using specific crystallographic orientation rules and use them to characterize defects in a nondestructive way [2,3]. However, it is not yet explored for power electronics materials. The ambition is to make ECCI a robust and nondestructive probe for crystal defects in semiconductors. To achieve this, a combination of known electron imaging conditions with machine learning/computer visionbased indexing of defects and comparison with simulated data is the goal. Subsequently, an automated procedure assisted by machine learningbased image processing combined with dynamical simulations of electron channeling contrast and Discrete Dislocation Dynamics (DDD) [4] is envisioned to open new routes for the daytoday use of ECCI in industry.[1] H. Kriaa, A. Guitton, N. Maloufi; SCIENTIFIC REPORTS,

- [2] H. Kriaa, A. Guitton, N. Maloufi; MATERIALS, 2019, , 1587
- [3] H. Kriaa, A. Guitton, N. Maloufi; MATERIALS, 2021, 14 (7), 1696
- [4] A.A. Kohnert, H. Tummala, R.A. Lebensohn, C.N. Tomé, and L. Capolungo; SCRIPTA MATERILIA, 2020.


We offer:

A 36-month full-time doctoral contract is available, starting ideally on September 1, 2023, but with flexibility to start earlier, including health coverage and paid holidays.

The position offers a dynamic international environment and close supervision by senior scientists. The opportunity to develop numerical skills such as modeling, computer vision, etc. is available to foster a career in academia or industry. The gross salary for the position is approximately 2534 €/month.


The doctoral school:

As PhD student, you will be registered at the Université de Lorraine and will be part of the C2MP (Chimie, Mécanique, Matériaux, Physique: Chemistry, Mechanics, Materials, Physics) doctoral school.

You will have the opportunity to benefit from a wide range of training programs during your PhD.


The local team of AddMorePower includes:

• Dr. Vincent TAUPIN, CNRS research scientist HdR, expert in continuum modeling of materials mechanics.
• Dr. Julien GUYON, research engineer, expert in SEM and development of cuttingedge techniques
• Additionally, the team includes another doctoral researcher and one postdoctoral researcher, as well as a collaborator, Prof. Laurent CAPOLUNGO from Los Alamos National Labs, USA, and academic and/or industrial collaborators within the AddMorePower project.

Advantages of working at the LEM3:

• As a valued member of our team, you will have access to a comprehensive social protection system in France as a foreign worker, including:
• _Universal healthcare coverage:_ Universal healthcare coverage: Our comprehensive healthcare system ensures that all necessary medical treatments, including doctor visits, prescription drugs, and hospital stays, are covered with a reference reimbursement rate of around 90% on average thanks to the Alsace/Moselle local regime (compared to 70% in the other regions of France).

- _Generous annual paid leave:_ Take advantage of the LEM3's generous annual leave policy, which allows you to take up to 45 days of annual leave to recharge and rejuvenate.
- _Retirement pensions:_ Contribute to the French retirement system and enjoy a pension when you reach retirement age

• Unemployment benefits:

If you lose your job, you may be eligible for