|About this Abstract
||Materials Science & Technology 2020
||Additive Manufacturing of Ceramic-based Materials: Process Development, Materials, Process Optimization and Applications
||Temporary Coating for Binder Jet 3D Printed Tungsten Carbide-Cobalt Parts
||Pierangeli Rodriguez De Vecchis, Katerina Kimes, Drew Elhassid, Markus Chmielus
|On-Site Speaker (Planned)
||Pierangeli Rodriguez De Vecchis
Tungsten carbide-cobalt (WC-Co) is a cermet material with excellent mechanical properties provided by small WC grains in a Co-matrix. Traditionally, WC-Co parts are formed through powder injection molding (slow, expensive and restricted to mass production). Binder jet 3D printing (BJ3DP) appeared as an alternative to traditional WC-Co manufacturing, allowing the production of highly detailed parts. Printing parameters for this complex powder were selected through a Design of Experiments. Previous studies showed storage and transportation of green parts induced cracks before sintering. This project aimed to find a temporary coating to facilitate transportation of green parts. ExOne solvent binder 04 and low-viscosity Cerita 983 runner wax (Paramelt Inc.) were compared. Mainly through microstructural analysis (grain size, squareness, phases and defects present), density and hardness results, the binder-coating was chosen to be the best option as it improved edge retention and mechanical properties of the part without significantly damaging the microstructure.