Powder injection molding (PIM) is an important netshape manufacturing process and has received much attention. One of the most critical steps in PIM process is debinding. It consumes a major part of the processing time. Failure of the powder compact often results if the process is accelerated. Thermal debinding is a common methodology for the final removal of residual polymer from a PIM compact...

Silicon carbide is the most important and versatile non-oxide ceramic. Powder injection molding (PIM) is a method of high-speed fabrication of complex near-net shapes of SiC and other powders. Green micro-machining (GMM) is used to extend the shaping capability of green ceramics and powder metallurgy to smaller feature sizes. Debinding—removal of organic additives—is the rate-limiting step in P...

In this paper, a wax-based binder was developed for low-pressure injection molding of very fine (0,4 μm) average particle size alumina ceramic bodies. The major component used in the binder mixture was paraffin wax. The process of binder removal from the green ceramics presented several difficulties especially when the ceramic powder was very fine, and the pieces had large cross-section. The pr...

Additive manufacturing of metals by 3D printing polymeric filaments containing high loading metal powder, subsequent debinding, and sintering offers a potent alternative to the widespread beam-based processes. The binder is decisive component for successful fabrication process. This study presents development multi-component system filament-based 316 L stainless steel in various optimization st...

The widespread application of additive manufacturing in ceramics is still hindered by recurrent cracking issues during debinding. To date, the various strategies that have been attempted to reduce this problem often fail upon particle size reduction. Indeed, a reduction affects diffusion rates (e.g. pore network) such even slow heating and long dwell times debinding may not prevent crack format...

As an alternative to powder-bed based processes, metal parts can be additively manufactured by extrusion additive manufacturing. In this process, a highly filled polymer filament is deposited and subsequently debindered sintered. Choosing proper orientation of the part that satisfies requirements debinding sintering processes crucial for successful manufacturing process. To determine optimal de...

Abstract In the present study, an additive manufacturing process of copper using extrusion 3D printing, solvent and thermal debinding, sintering was explored. Extrusion printing metal injection moulding (MIM) feedstock used to fabricate green body samples. The performed with optimized parameters achieve high density low surface roughness. To remove water-soluble polymer, immersed in water for d...