Preparation of Titanium/Strontia Composite by Powder Metallurgy for Biomedical Application
In this study, a Titanium (Ti) / Strontia (SrO) composite was prepared using powder metallurgy, with the aim of obtaining advanced Ti-based composites for use as bone implant materials. Ti/SrO composites with 3 wt% SrO were fabricated using spark plasma sintering (SPS) and vacuum sintering (VS) processes. The particle morphology of ball-milled powders and the microstructure of the Ti/SrO composites were analyzed by X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) equipped with energy dispersive X-spectroscope (EDX). The mechanical properties of the Ti/SrO composite were investigated using nanoindentation and hardness tests. The results showed that the Vickers hardness and nanohardness of the Ti/SrO composites fabricated by both processes were significantly higher than those of pure Ti. The Vickers hardness and nanohardness of Ti/SrO composites fabricated by the SPS process were higher than those prepared using the vacuum sintering process. The elastic modulus of Ti/SrO composites fabricated by the SPS process was higher than those samples fabricated by the vacuum sintering process which was similar to that of pure Ti.
Y. Wang et al., "Preparation of Titanium/Strontia Composite by Powder Metallurgy for Biomedical Application", Key Engineering Materials, Vol. 520, pp. 248-253, 2012