Niobium Biomaterials

The impact of microstructural refinement on the tribological behavior of niobium processed by Indirect Extrusion Angular Pressing

“…Particularly with respect to implantable biomaterials, it has demonstrated high potentials thanks to its excellent corrosion resistance and biocompatibility, although suffering from relatively low yield and low ultimate strength, which could imply low fatigue resistance as well. In principle, failure in biomedical materials usually happens due to fatigue rather than yielding or overloading [48]. The present study into the impact of IEAP on the microstructural refinement of niobium uncovered clear evidence on enhancing the strength and wear resistance of the material, especially in terms of fatigue wear, while such modifications would not alter the biocompatibility of the material [43].…”

“…Enhancing the mechanical and tribological properties of niobium, therefore, may arouse strong interest in the implementation of this material for biomedical applications [48].…”

Mechanical Properties and Metallurgical Features of New Green NiTi Reciprocating Instruments

“…Based on its peculiar surface morphology, this coating was probably obtained by a physical vacuum deposition process. Nb and Nb 2 O 5 are known as biocompatible materials, due to their inertness [ 41 ]. Specifically, Nb 2 O 5 has high chemical stability; therefore, metallic Nb is also inert in the body environment, as its surface can be passivated by a thin, dense Nb 2 O 5 film.…”

“…The latter can either be formed by spontaneous exposure to the environment, or its formation can be enhanced by some dedicated oxidation treatment. Nb is mostly used as a coating onto other metallic surfaces, in order to take advantage of its corrosion resistance and chemical inertness whilst avoiding the drawbacks due to its poor mechanical properties in bulk form [ 41 ]. Based on these considerations, an Nb/Nb 2 O 5 coating onto the NiTi files would appear to be a reasonable choice.…”

Fabrication and characterization of Nb2O5‐doped 3Y‐TZP materials sintered by microwave technology

“…Specifically, niobium oxides due to their great potential have been applied as solid electrolytic capacitors, and in many other technological applications as transparent conductive oxides and others. Niobium oxide is a colorless and insoluble solid that is not reactive 10,11 . By combining the excellent properties of both materials, zirconia and niobium oxide, high value‐added ceramic composites could be obtained.…”