Sinter-based Additive Manufacturing of bio-degradable metallic orthopedic implants

MATEIS Lab, INSA Lyon

Personnes à contacter par le candidat

xavier.boulnat@insa-lyon.fr

DATE DE DÉBUT SOUHAITÉ

01/10/2021

TÉLÉCHARGEZ L’OFFRE

In this PhD thesis, we will focus on sintering-assisted 3D printing techniques of magnesium. Either by direct-ink writing or metal lithography, two techniques available in our lab, the main challenge remains the optimization of debinding/sintering processes, as magnesium is one of the most reactive metal for oxidation issue. The PhD student will put his/her efforts on:

1) the production of dense parts using pressure-assisted sintering that will be used as references

2) the 3D printing of either porous or complex-shaped structures. This will be done by:

  • direct-ink writing, which is a 3D extrusion process followed by debinding/sintering ;
  • metal lithography, which is based on the curing of a photo-sensitive polymer to consolidate the metallic part, followed by debinding/sintering

3) the detailed characterisation of the parts, from the microstructure to the mechanical and the corrosion properties. The properties will depend on the precipitation-hardening strategy, which will be optimised.

4) As an alternative to magnesium alloy, a Zn alloy will be designed, produced and tested.