Progress in Niobium Oxide-Containing Coatings for Biomedical Applications: A Critical Review

Abstract

Typically, pure niobium oxide coatings are deposited on metallic substrates, such as commercially pure Ti, Ti6Al4 V alloys, stainless steels, niobium, TiNb alloy, and Mg alloys using techniques such as sputter deposition, sol–gel deposition, anodizing, and wet plasma electrolytic oxidation. The relative advantages and limitations of these coating techniques are considered, with particular emphasis on biomedical applications. The properties of a wide range of pure and modified niobium oxide coatings are illustrated, including their thickness, morphology, microstructure, elemental composition, phase composition, surface roughness and hardness. The corrosion resistance, tribological characteristics and cell viability/proliferation of the coatings are illustrated using data from electrochemical, wear resistance and biological cell culture measurements. Critical R&D needs for the development of improved future niobium oxide coatings, in the laboratory and in practice, are highlighted.

Additive Manufacturing: An Opportunity for the Fabrication of Near-Net-Shape NiTi Implants

“…Although it is possible to decrease the concentration of the leached Ni ions with a change in the porosity content of the AM-fabricated NiTi, it is essential to put forward a feasible strategy to tackle this problem. The application of an appropriate surface-modification technique as a potential solution not only suppresses the release of the ions but also provides new functions to the NiTi [169][170][171][172][173][174][175][176]. Surface treatment methods that allow the control of the chemistry and morphology, e.g., passivation/controlled oxidation or mechanical/electrolytic polishing, are more resistant to Ni ion leaching, with some surfaces showing Ni ion release below the detection limit of the method used [177,178].…”

Manufacturing Technologies of Polymer Composites—A Review

“…By controlling process parameters, it is possible to obtain optimised mechanical properties of manufactured parts [ 13 ]. Their good biocompatibility, bioactivity, biostability, friction, wear performance and corrosion resistance enable them to be used in this field [ 14 , 15 , 16 ]. Thermoplastic polymers such as polylactic acid (PLA), polycaprolactone (PCL), polyglutamic acid (PGA), lactic acid/glycolic acid copolymer (PLGA) and polysanya methyl carbonate (PTMC) have become the main materials of bone scaffolds in medical surgery after compositing with nanohydroxyapatite [ 17 ].…”

Oxido- and mixed-ligand peroxido complexes of niobium(v) as potent phosphatase inhibitors and efficient catalysts for eco-friendly styrene epoxidation

“…We describe in this report the synthesis and characterization of two new mixed-ligand triperoxido niobium(V) complexes (2 and 3) with maltol (malt) or deferiprone (def ) as a co-ligand as well as the facile synthesis and structural characterization of a heretofore unreported neutral tris(maltolato)oxidoniobium(V) complex (1). The crystal structure of the homoleptic potassium tetraperoxidoniobate complex K 3 [Nb(O 2 ) 4 ] (4) is also reported here.…”