A Study on Sintered Titanium Alloy Produced by Blended Elemental Process

Abstract

The effect of eutectoid β stabilizing elements on the sintering characteristics of Ti powder compacts was carried out in order to get the high dense sintered Ti alloy by conventional sintering method through blended elemental process.
The addition of Fe, Ni and Co among eutectoid β stabilizing elements showed the excellent effect on the densification of Ti powder compacts, where the sintered density ratio of Ti-4 mass%Co specimen was higher than 99%, and both of their ratios of Ti-4 mass%Fe and Ti-4 mass%Ni were higher than 98%. The tensile properties for sintered Ti-4 mass% Co and Ti-4 Fe specimens were remarkably improved by (α+β)-quenching after β-solution treatment, and the corrossion resistance of Ti-4 mass%Fe specimen in both of physiological saline solution and 1N-HCl solution was confirmed to be better than those of Ti-6 Al-4 V specimen or Ti-5 Al-2.5 Fe specimen which was newly developed as implanted material. In addition, the implantation test maintained in the tibia of rabbit for 14 months showed that Ti-4 Fe specimen had the excellent biocompatibility.