Ejemplo de éxito:

Transferencia de Tecnología para el procesamiento de Hidroxiapatita para recubrimientos de implante total de cadera.

 

Por favor descargue aquí nuestro resumen acerca del proceso de recubrimiento de hidroxiapatita (HAp) para aplicaciones en recubrimientos de prótesis total de cadera.

Éste desarrollo tecnologico ha sido posible gracias a diversos proyectos de estímulos a la innovación emitidos por el consejo nacional de ciencia y tecnología, CONACyT.

 

Artículos de divulgación científica:

Effect of HVOF processing parameters on the properties of NiCoCrAlY coatings by design of experiments (Review)

Ruiz-Luna, H.a, Lozano-Mandujano, D.a, Alvarado-Orozco, J.M.b, Valarezo, A.c, Poblano-Salas, C.A.d, Trápaga-Martínez, L.G.a, Espinoza-Beltrán, F.J.a, Muñoz-Saldaña, J.a
aCentro de Investigación y de Estudios Avanzados Del I.P.N., Fraccionamiento Real de Juriquilla, Libramiento Norponiente No. 2000, 76230 Santiago de Querétaro QRO, Mexico.
bUniversity of Pittsburg, Benedum Hall, 3700 O'Hara St, Pittsburgh, PA 15261, United States.
cColegio Politécnico - Ingeniería Mecánica, Universidad San Francisco de Quito, Cumbayá Diego de Robles y Vía Interoceánica, Quito, Ecuador.
dCentro de Tecnología Avanzada, A Parque Industrial Bernardo Quintana, El Marques, Av. Manantiales 23, Querétaro, 76246 Santiago de Querétaro QRO, Mexico.

Abstract
The effect of three principal, independent, high-velocity oxygen fuel (HVOF)-processing parameters on the properties of NiCoCrAlY coatings deposited using commercial powders is reported here. The design of experiments (DoE) technique at a two-level factorial and a central composite rotatable design was used to analyze and optimize the HVOF spraying process. The deposition parameters investigated were (1) fuel flow, (2) oxygen flow, and (3) stand-off distance. The effect of these processing variables was evaluated using selected responses, including porosity and oxide content, residual stresses, and deposition efficiency. Coatings with low porosity as well as with low residual stress were obtained using high fuel-rich conditions at a stand-off distance between 250 and 300 mm. At shorter and longer stand-off distances, respectively, either excessive flattening of splats or un-molten condition occurred, resulting in high levels of porosity and residual stress. The response surface, the empirical relationships among the variables, and the response parameters allowed the selection of optimum deposition parameters and the improvement of coating properties. © 2014 ASM International. 

 

Effects of VC additions on the mechanical properties of bimodal WC-Co HVOF thermal sprayed coatings measured by nanoindentation

Poblano-Salas, C.A.a, Cabral-Miramontes, J.A.b, Gallegos-Melgar, A.c, Ruiz-Luna, H.c, Aguilar-Escobar, J.D.a, Espinosa-Arbelaez, D.G.c, Espinoza-Beltrán, F.c, Trapaga-Martínez, G.c, Muñoz-Saldaña, J.c
aCIATEQ A.C., Centro de Tecnología Avanzada, Parque Industrial Bernardo Quintana, Av. Manantiales 23 AEl Marqués, Querétaro, Mexico.
bUniversidad Autónoma de Nuevo León, Facultad de Ingeniería Mecánica y Eléctrica, Aeropuerto Internacional Del Norte, Carr. Salinas VictoriaApodaca, N.L., Mexico.
cCentro de Investigación y de Estudios Avanzados Del Instituto Politécnico Nacional, Fraccionamiento Real de Juriquilla, Libramiento Norponiente #2000 Querétaro, Mexico.

Abstract
Measurement of mechanical properties in cermets is complex since they are formed by several phases. How to quantitatively determine the relationship between the performance and the complex microstructure of this particular group of materials, especially when analyzing the effect of the reinforcement phase, is still one of the top challenging problems yet to be solved. Hardness and elastic modulus of bimodal WC-Co HVOF thermal spray coatings doped with vanadium carbide (VC) additions were studied by performing a statistical analysis of nanoindentation results. A mathematical deconvolution procedure and a Weibull distribution analysis of hardness and elastic modulus results are proposed to identify the individual contribution of each phase to the mechanical properties of different WC-12Co coatings. Both analysis methods allowed to detect a reinforcing effect of vanadium on the hardness and elastic modulus of bimodal VC-doped coatings. The combination of VC additions and a bimodal WC particle size distribution in the WC-Co coatings proved successful in increasing their mechanical properties, as the coatings processed in this work showed better mechanical properties than that reported in the literature for coatings having exclusively a bimodal WC particle size distribution or those only doped with VC additions.

 

Parameter studies on high-velocity oxy-fuel spraying of CoNiCrAlY coatings used in the aeronautical industry

Cabral-Miramontes, J.A.a , Gaona-Tiburcio, C.a , Almeraya-Calderón, F.a , Estupiñan-Lopez, F.H.a , Pedraza-Basulto, G.K.a , Poblano-Salas, C.A.b
a Facultad de Ingeniería Mecánica y Eléctrica (FIME), Centro de Investigación e Innovación en Ingeniería Aeronáutica (CIIIA), Aeropuerto Internacional Del Norte, Carr. Salinas Victoria Km. 2.3, 66600 Apodaca, NL, Mexico.
bCentro de Tecnología Avanzada (CIATEQ, A.C.), Procesos de Manufactura, Parque Industrial Bernardo Quintana, Avenida Manantiales 23-A, 76246 El Marqués, Qro, Mexico.

Abstract
The thermal spraying process is a surface treatment which does not adversely affect the base metal on which it is performed. The coatings obtained by HVOF thermal spray are employed in aeronautics, aerospace, and power generation industries. Alloys and coatings designed to resist oxidizing environments at high temperatures should be able to develop a surface oxide layer, which is thermodynamically stable, slowly growing, and adherent. MCrAlY type (M = Co, Ni or combination of both) coatings are used in wear and corrosion applications but also provide protection against high temperature oxidation and corrosion attack in molten salts. In this investigation, CoNiCrAlY coatings were produced employing a HVOF DJH 2700 gun. The work presented here focuses on the influences of process parameters of a gas-drive HVOF system on the microstructure, adherence, wear, and oxygen content of CoNiCrAlY. The results showed that spray distance significantly affects the properties of CoNiCrAlY coatings.

CENAPROT - Centro Nacional de ProyecciónTérmica | Acerca de CENAPROT | Tecnologías | Servicios | Equipo | Documentación | Contacto

Copyright © 2014 CINVESTAV. Todos los derechos reservados. Diseñado por: Abkam Comunicación© 2014.

CENAPROT - Centro Nacional de ProyecciónTérmica | Acerca de CENAPROT | Tecnologías | Servicios | Equipo | Documentación | Contacto

Copyright © 2014 CINVESTAV. Todos los derechos reservados. Diseñado por: Abkam Comunicación© 2014.