Development of Porous Ti-6Al-4V Mix with Palm Stearin Binder by Metal Injection Molding Technique | Science Publications

摘要

> >Good potential of biocompatibility and excellent mechanicalproperties, porous Ti-6Al-4V has become a great interest for biomedicalapplications. In this study, porous Ti-6Al-4V was fabricated by Metal InjectionMolding (MIM) using Palm Stearin (PS) and Polyethylene (PE) binder togetherwith sodium chloride (NaCl) as a space holder. Rheological characterization wasperformed to evaluate the flowability of the feedstocks for injection moldingand the feedstocks exhibited a pseudoplasticbehavior which is suitable for injection. The as-sintered parts were fabricatedas the mixing, injection molding, debinding and sintering were conductedsuccessfully. The mechanical properties of the as-sintered parts wereinvestigated via tensile test and the results obtained were closed with theestablished range. Shrinkage, density and X-Ray Diffractometry (XRD) of theas-sintered parts were compared with the theoretical values which were foundclosed to the acceptable ranges. The microstructure of the surface andcross-section were observed under Scanning Electron Micrograph (SEM) andoptical microscope to analyze the specimens before and after sintering.Generally, palm stearin binder system added with space holder to fabricateporous Ti-6Al-4V by MIM is feasible and has shown a good potential forbiomedical applications.