Mise en forme par microstéréolithographie et frittage de céramiques macro-micro-poreuses en hydroxyapatite silicatée et évaluation biologique

TL;DRAbstract

Macro-micro-porous bioceramics made of silicated hydroxyapatite (SiHA), with a controlled architecture, were shaped by microstereolithography and consolidated by sintering. For this purpose, slurries with SiHA particles, dispersed in organic photosensitive medium, were developed. Their rheological behaviour was studied according to the powder, organic diluent and dispersant amounts. A formulation, allowing a good compromise between rheological behaviour and reactivity of the suspension, definition and mechanical strength of the shaped macroporous parts, was chosen. After optimization of the process parameters, the study of the overcure, according to the dimensions and the geometry of the macropores, has led to a predictive sizing model of pores, used for the computer aided design of the parts. Model specimens, containing different pore sizes (> 300 μm) of several geometries, were then shaped. The influence of the sintering temperature and time, on the ceramic microstructure, was invest

Chat with Paper

AI Agents for this Paper