In this work, hydroxyapatite (HAp) thin films were fabricated using two different sputtering techniques: Radio frequency magnetron sputtering and ion beam sputtering. In the first case, the films were grown on Ti-6Al-4V substrates using a high-purity commercial HAp target, obtaining a thickness ~200 nm. For the second method, the film were grown on pure titanium substrates using a self-produced HAp target. This target was fabricated with powders (Ca/P = 1.628, sintered and crushed). Here, the thickness of the fabricated film was ~300 nm. The sintering tests for the target fabrication were carried out using two different heating regimens at a maximum temperature of 1200 °C (holding time of 2h and 4h) using various additives. As additives, water (H2O), polyvinyl alcohol (PVA) and polyethylene glycol (PEG) were used to improve the mechanical strength of the green discs. The as-deposited fi...

In this work, hydroxyapatite (HAp) thin films were fabricated using two different sputtering techniques: Radio frequency magnetron sputtering and ion beam sputtering. In the first case, the films were grown on Ti-6Al-4V substrates using a high-purity commercial HAp target, obtaining a thickness ~200 nm. For the second method, the film were grown on pure titanium substrates using a self-produced HAp target. This target was fabricated with powders (Ca/P = 1.628, sintered and crushed). Here, the thickness of the fabricated film was ~300 nm. The sintering tests for the target fabrication were carried out using two different heating regimens at a maximum temperature of 1200 °C (holding time of 2h and 4h) using various additives. As additives, water (H2O), polyvinyl alcohol (PVA) and polyethylene glycol (PEG) were used to improve the mechanical strength of the green discs. The as-deposited fi...

La industria siderúrgica nacional produce aproximadamente 1.1 millones de TM de acero por año, en cuyo proceso se genera un residuo sólido denominado “cascarillas de óxidos de hierro”. El presente trabajo es un estudio acerca de la factibilidad de emplear dicho residuo siderúrgico en la fabricación de revestimientos para electrodos de soldadura, reemplazando a un óxido de hierro mineral de mayor costo, denominado óxido de hierro micáceo (MIO). La cascarilla posee un contenido aproximado de 68 % de hierro, que es equivalente al contenido de hierro que posee el MIO (66 %), lo que le confiere al revestimiento similares propiedades químicas y metalúrgicas. Además, la cascarilla posee una granulometría en la que el 8 % del material es menor a 500 µm, mientras que el MIO posee una granulometría en la que el 99 % es menor a dicho tamaño. Es por ello que se realizaron balance...