Porous ceramic structures obtained by using novel polymer-ceramic systems via additive manufacturing technologies

HUNG HUNG, Y. M. X.; GUTIÉRREZ-CAMPOS, D.; SANDOVAL, M. L.; CAMERUCCI, M. A.; TALOU, M. H.

Ciudad de Panamá

Congreso; Pan American Ceramics Congress and Ferroelectrics Meeting of Americas (PACC-FMAs 2022); 2022

Additivemanufacturing refers to different near-net shape fabrication techniques inwhich apart is generated from 3D model data by adding material. Thesetechnologies allow the direct production ofcomponents with complex shapes,which are difficult to fabricate using conventional forming methods. Amongthem,fused deposition modeling (FDM) and selective laser sintering (SLS) arehighlighted in the ceramicprocessing field. In this context,the design andpreparation of appropriate feed systems constitutes still achallenge to solve.In thiswork, porous ceramic structures developed from novel polymer-ceramic systemsvia FDM and SLSwere obtained. Alumina and polyamide (PA612) powders were usedas ceramic and polymeric materials.PA612-alumina granules were prepared bythermally induced phase separation (TIPS) to be used as a printerfeed materialalternative to the composite filament for FDM, while thePA612-alumina-micrographite granulesprepared also by TIPS and then milled andspray dried were used as a new feed system for SLS. Both types ofgranules werecharacterized by granulometric distribution, density and SEM/EDS. Printed,burned (800-1200°C) and sintered (1580 °C) porous ceramic structures werecharacterized by density and porositymeasurements, and SEM. The parts showedgood intra and interlayer adhesion, high skeletal densificationand macroporousstructure control.