Development of a Selected Laser Sintering Process

il y a 4 semaines


Strasbourg, France ICube Laboratory Temps plein

**Development of a selected laser sintering process and its numerical model for lunar dust simulants**:

- Réf
- **ABG-111538**
- Sujet de Thèse- 28/02/2023- Financement public/privé- ICube Laboratory- Lieu de travail- Strasbourg - Grand Est - France- Intitulé du sujet- Development of a selected laser sintering process and its numerical model for lunar dust simulants- Champs scientifiques- Matériaux
- Sciences de l’ingénieur
- Mots clés- laser, additive manufacturing, 3D printing, regolith, lunar dust, ceramics; selected laser melting; vacuum**Description du sujet**:

- Nations with space capabilities are now in a race to build the first base on the Moon as launch pad to go to Mars. The European Space Agency is currently recruiting the next generation of astronauts that will go back to the moon on the
- _Artemis_ project. Additive manufacturing using regolith, the main Lunar in-situ material resource, is offering a solution for long duration stay on the Moon or Mars. Appling Selective Laser Sintering (SLS) technology to build infrastructures or tools will reduce the space transportation efforts from Earth and lower the cost of the space missions. Furthermore, additive manufacturing will be a precious asset for compagnies looking into settlements for space mining of various resources such as water and helium 3.-
- Our research team has developed a powder bed SLS prototype using a 100 W 1090 nm CW laser and a galvo head for high speed and accuracy. The heigh and compression of the added layers can be controlled thanks to a Z-stage, a roller and a blade. Various lunar dust simulants were characterized by XRD and used (JSC-2A, LHS, LMS, and EAC-1). Specific care is taken when manipulating the nano-size powders. The experimental process is monitored by a pyrometer. The process conditions are optimized thanks to a numerical model developed on COMSOL Muliphysics.- Nonetheless, the processing condition do not currently reflect those that will be met in space such as gravity or atmosphere. In order to recreate some of the conditions, a vacuum chamber with 10-2mbar capacity is currently being refurnished. This chamber will host X/Y/Z/rotation stages. The outside will be adapted to fit the laser and galvo head to stir the beam. The Phd student will have to finish the instrumentation of the vacuum chamber.- The thermomechanical characterization of the samples will be made by the CGE team at ICube, Strasbourg, and the ICA, Albi.-
- The optimization of the process in the experimental powder bed SLS machine for various simulants
- The optimization of the process in the low atmospheric conditions
- The optimization of the numerical model**Nature du financement**:

- Financement public/privé**Précisions sur le financement**:
**Présentation établissement et labo d'accueil**:

- ICube LaboratoryICube Laboratory

The Engineering science, computer science and imaging laboratory

Created in 2013, the laboratory brings together researchers of the University of Strasbourg, the CNRS (French National Center for Scientific Research), the ENGEES and the INSA of Strasbourg in the fields of engineering science and computer science, with imaging as the unifying theme.

**Site web**:
**Intitulé du doctorat**:

- Doctorat de Photonique**Pays d'obtention du doctorat**:

- France**Etablissement délivrant le doctorat**:

- Université de Strasbourg**Ecole doctorale**:

- Mathématiques, sciences de l'information et de l'ingénieurCompetence in mechatronics for the integration of the motion tables in a vacuum chamber.
Competence if possible in optics/optomechanics/optoelectronics for the implementation of the optical train in the vacuum chamber and the optimisation of the current sintering system.
Competence in material characterisation by XRD, durometer, dilatometry, metallography, tensile/compression tests.
Knowledge in laser sintering/melting on powder bed.
Experience in additive manufacturing.
Knowledge in ceramics.



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