Materiales y técnicas de fase vapor para la síntesis de recubrimientos cerámicos

Abstract

A survey on recent advances in the synthesis of hard ceramic coatings is given, including materials processes and techniques. Emphasis is made on the parameters which control the coating properties (crystalline structure, morphology, etc), namely arrival energy of the atoms to the growing surface and substrate temperature. Some relevant coating materials are discussed in relation to their applications either as hard protective coatings or with decorative purposes, namely: the family of metal nitrides, carbides, and oxides, in different layer structures (monolithic, multilayers and nanocomposites) and ternary compounds of the BCN system. Keywords: Ceramic coatings, physical and chemical vapour deposition, hardness. Materiales y técnicas de fase vapor para la síntesis de recubrimientos cerámicosSe hace un descripción de los avances recientes en la síntesis de recubrimientos duros de tipo cerámico, depositados mediante técnicas de deposición en fase vapor. Se dedica especial atención a los parámetros del proceso de deposición que controlan las propiedades finales de las capas (estructura cristalina, morfología, etc), tales como la energía de llegada de los átomos a las superficie en crecimiento, y la temperatura. Finalmente, se hace una revisión de los materiales más relevantes en lo que se refiere a sus aplicaciones como recubrimientos duros y protectores, o como recubrimientos decorativos, entre ellos, la familia de los nitruros, carburos y óxidos metálicos, depositados en diversos tipos de estructuras (monolíticas, multicapas y nanocomposites), y los compuestos ternarios del sistema BCN.Palabras clave: Recubrimientos cerámicos, deposición física y química de fase vapor, dureza.

Ultrasound-Assisted Hydroxyapatite-Decorated Breath-Figure Polymer-Derived Ceramic Coatings for Ti6Al4V Substrates

“…It is worth mentioning that surface coatings can be formed via vapor-phase processes such as plasma spraying, hot isostatic pressing, and thermal spraying , or via imbibition-based processes such as dip coating and Langmuir–Blodgett deposition . In comparison, the BFTSA process offers additional benefits such as selectively decorating the pore structures by inorganic nanoparticles (NPs). , In recent years, this procedure has gained more interest because of either the benefits of forming hybrid polymeric–inorganic patterned films or the Pickering emulsion phenomenon.…”

“…15 Furthermore, SiON coatings show a thermal expansion coefficient that matches the coefficient of medical-graded titanium alloys (i.e., Ti6Al4V), thus reducing excessive stresses and failure at the interface with the solid titanium surface. 23 It is worth mentioning that surface coatings can be formed via vapor-phase processes such as plasma spraying, hot isostatic pressing, and thermal spraying 26,27 or via imbibition-based processes such as dip coating 28 and Langmuir−Blodgett deposition. 29 In comparison, the BFTSA process offers additional benefits such as selectively decorating the pore structures by inorganic nanoparticles (NPs).…”

Biocide Activity of TiO₂ Nanostructured Films

“…In this study, a combination of methods was used to obtain TiO 2 films: sputtering and electrophoretic deposition [10][11][12]. In order to obtain a conductive substrate with similar composition to titanium oxide, sputtering [13] of metallic titanium on glass was proposed, followed by the use of these substrates as electrodes for electrophoretic deposition (EPD) in which titania is deposited from a stable colloid suspension by an electric field. The EPD technique involves two processes: electrophoresis and deposition.…”