General information
Organisation
The French Alternative Energies and Atomic Energy Commission (CEA) is a key player in research, development and innovation in four main areas :
• defence and security,
• nuclear energy (fission and fusion),
• technological research for industry,
• fundamental research in the physical sciences and life sciences.
Drawing on its widely acknowledged expertise, and thanks to its 16000 technicians, engineers, researchers and staff, the CEA actively participates in collaborative projects with a large number of academic and industrial partners.
The CEA is established in ten centers spread throughout France
Reference
SL-DES-24-0781
Thesis topic details
Category
Technological challenges
Thesis topics
Investigations of binder infiltration in a powder bed during the Binder Jetting process
Contract
Thèse
Job description
Binder jetting (BJ) is an additive manufacturing process (also called 3D printing), that consists in jetting a binder on a powder bed made of metallic or ceramic particles, so that to build a part from a 3D model. Once the binder has cured, the part is extracted from the powder bed and sintered. A major challenge of this process is to predict the state of the part after printing (density, homogeneity, defects). Printing strategy, powder size/shape and binder type all have an impact on the part before densification. The aim of this thesis is to study the interaction between the binder and the powder during the printing process. Ultimately, this should help to optimize the process. The thesis will focus on developing a model for droplet infiltration in a powder bed. To achieve this objective, the proposal is to use innovative numerical methods to model the fluid-structure interaction operating in the powder bed, taking into account capillary forces and dynamic effects (droplet fragmentation, particle displacement). Experimental investigations are also planned, firstly to calibrate the numerical parameters associated with the model, and secondly to validate the model. In fact, a dedicated experimental bench was previously developed, and will be used to characterize the surface state of the powder bed before and after infiltration.
University / doctoral school
Ingénierie - Matériaux - Environnement - Energétique - Procédés - Production (IMEP2)
Université Grenoble Alpes
Thesis topic location
Site
Grenoble
Requester
Position start date
01/10/2024
Person to be contacted by the applicant
BURR Alexis alexis.burr@cea.fr
CEA
DES/DTNM//L3M
CEA Centre de Grenoble
17 avenue des Martyrs
38000 GRENOBLE
0438784762
Tutor / Responsible thesis director
GARANDET Jean-Paul jean-paul.garandet@cea.fr
CEA
DES/DTNM//L3M
CEA Paris-Saclay
LIST/DISC
91191 GIF-SUR-YVETTE CEDEX
01 69 08 91 50
En savoir plus