Synthesis and Characterization of Shape Memory Porous Ti6Al4V/Ta Components for Bone Implant Applications

摘要

The goal of this work is to fabricate components with tailored porosity, made of shape memory Ti6Al4V/Ta alloy by solid state sintering for bone implant applications. Sintering kinetics is evaluated by dilatometry tests in order to determine the effects of Ta addition on the formation of shape memory crystalline structure. Porosity is induced by pore formers with controlled distribution and location so as to obtain components that mimics human bones. These components are characterized by SEM, X ray diffraction and microtomography. Mechanical properties are obtained from simple compression and nanoindentation tests. The effect of pore size on permeability is also studied by numerical simulations based the real 3D microstructure.