Porous Titanium Coatings Obtained by Electrophoretic Deposition (EPD) of Pickering Emulsions and Microwave Sintering

Abstract

Porous titanium coatings on dense Ti6Al4V substrates were made by electrophoretic deposition (EPD) of titanium particle stabilized Pickering emulsions. The samples were consecutively dried and microwave sintered in helium to prevent oxidation. The obtained coatings have a thickness ranging from 50 to 250 μm with open spherical macropores in the 20 to 200 μm range.

Electrophoretic Deposition of Porous Ti Coatings for Bone Implants: <i>In Vitro</i> and <i>In Vivo</i> Evaluation

“…Porous Ti Coatings. The use of TiH 2 powders resulted in a higher sinterability compared to pure Ti powders, allowing reducing the sintering temperature from 1050°C to 850°C below the β-transus (975 ± 15°C) of the Ti-6Al-4V substrate [10]. Hence, the formation of a Widmanstätten microstructure upon cooling was avoided and the original equiaxed α+β microstructure and concomitant mechanical properties could be preserved.…”

Interfacial Assembly of Turnip Yellow Mosaic Virus Nanoparticles

“…Pickering emulsions are surfactant-free dispersion of oil in water or water in oil that are stabilized by the interfacial assembly of colloidal particles. , The surfaces of emulsion droplets are ideal for the assembly of micrometer-sized colloidal particles, and the concept can also be extended to nanoparticles. With the emergence of well-defined nanoparticle assemblies, these emulsions can be used to generate membranes and encapsulants with well-defined porosity, − high mechanical strength, and against coalescence. ,− …”

“…11,12 The surfaces of emulsion droplets are ideal for the assembly of micrometer-sized colloidal particles, and the concept can also be extended to nanoparticles. With the emergence of well-defined nanoparticle assemblies, these emulsions can be used to generate membranes and encapsulants with well-defined porosity, [25][26][27] high mechanical strength, and against coalescence. 8,[28][29][30] The nature of the oil phase plays an important role in governing the stability of emulsions.…”

Novel anti-infective implant substrates: Controlled release of antibiofilm compounds from mesoporous silica-containing macroporous titanium

“…To improve the sinterability of the powder compact, small amounts of TiH 2 powder can be added. Hydrogen release during heat treatment (between 450 and 650 • C) reduces oxide impurities at the powder surface and allows lowering the sintering temperature significantly without compromising the mechanical strength [46,47]. Moreover, the hydrogen content after heat treatment remains well below the accepted level of hydrogen impurity for commercially pure Ti grades 1-4 according to ASTM F67 [46].…”