Microstructure, Mechanical Properties and biocompatibility of Ultra Fine Grained Ti-Nb-X Composites with CPP Fabricated by SPS using HEMM powders

摘要

A novel p Ti-25wt%Nb-7wt%Zr-10wt%Mo-calcium pyrophosphate (CPP) composite that is a biocompatible alloy without elemental Al or V was fabricated by spark plasma sintering (SPS) at 1000°C under 60 MPa using high energy mechanical milled (HEMM) powder. The effects of CPP contents and milling time on biocompatibility and mechanical property have been investigated. By X-ray diffraction (XRD), chemical reaction during the sintering was occurred and revealed new phases, Ti2O, CaO, CaTiO3 and Ti_xP_y. Vickers hardness of composites increased with increase milling time and addition of CPP contents. The biocompatibility of the Ti-Nb-Zr-Mo alloys was improved by addition of CPP.