Fabrication of Bioactive Porous Titanium by Metal Injection Molding and Its Properties

Abstract:

Metal injection molding (MIM) was used to fabricate porous titanium with sodium chloride (NaCl) as spacer-holder. The effects of sintering temperature, particle size and amount of the spacer-holder on porosity, microstructure and mechanical properties were investigated. The results show that the porosity of porous titanium decreases while the compressive strength and elastic modulus increases with the increasing of sintering temperature. The pore size of porous titanium decreases with the granularity of NaCl decreasing, and the porosity increases with the addition of spacer-holder. The optimum sintering temperature of MIM porous titanium implant is 1100-1200 oC, and the optimum granularity of NaCl is 150-250 μm.