Refine
Year of publication
- 2019 (1) (remove)
Document Type
Language
- English (1)
Keywords
- Nanobiomaterials (1) (remove)
Institute
The osteoarthritis and degenerative diseases osteoporosis as well as trauma lead to the bone mechanical properties degradation due to absence of normal biological self healing processes or excessive loading [1–5]. These problems solution are artificial biomaterials, as surgical implantation of appropriate shapes helps restore function for the otherwise functionally compromised structures [1–5]. Biocompatibility is considered to be optimal once tissue neoformation and later function occurs around implantable devices [6]. The efficacy of biomaterials implants is determined mostly by their surface characteristics such as microstructure, surface morphology, composition and biological properties [2]. Aiming to develop alloys with better properties for orthopedic applications, the focus of the present research was to evaluate the effect of Zr at. % content on structural, mechanical and tribological properties of hot isostatically pressed Ti-25Nb-xZr (x = 5, 10, 15, 20 and 25 at. %) alloys. The structural evolution, and mechanical properties of the nanostructured Ti-Nb-xZr alloys were evaluated using X-Ray diffraction, scanning electron microscope. The mechanical properties were performed using Vickers hardness and berkovich nanoindentation. Experimental results indicated that the structural evolution and morphological changes of the milled alloys were sensitive to their Zirconium (at. %) content. The morphological characterization showed that the crystallite size and the particle size decreased with increasing Zr content (at. %). As well, as the Zr was added to the Ti-25NbXZr system, there was a clear decrease in the Vickers hardness and young’s modulus. On the other hand, the coefficient of friction and wear rates were found to be decreasing with increasing Zr content.