Paper Title
Fabrication of Porous Ti-Based Biomaterial for Hard Tissue Implants

Abstract
The applications of titanium (Ti) based alloys are widely used as orthopedic implants owing to their excellent combination of mechanical properties, corrosion resistance and outstanding biocompatibility. In the present study, Ti-based biomaterial (TiNbZr) with different porosity was fabricated by powder metallurgy. The porosity of fabricated samples is close to natural bone; also the compression strengthsof the samples are higher than that of natural bone. Adding Nb and Zr elements in to Tiare strong β-phase stabilizers in Ti-based alloys, and thus contribute significantly to a decrease of the elastic modulus of the alloys. The reduced elastic module doesn’tcause wear of bone. SEM-EDX and XRD analyzed show that α and β phases are seen in the microstructure of TiNbZr alloys. Porosity decreases with increasing sintering temperature and compressive strength increases with decreasing porosity. Also,α phase convert to β phase with increasing sintering temperature, and so the structure consists mainly β phase. Keywords- TiNbZr alloy, Powder metallurgy, Biomaterials