Recent Submissions

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    Reaction Layer Analysis of In Situ Reinforced Titanium Composites: Influence of the Starting Material Composition on the Mechanical Properties  [Article]

    Montealegre-Meléndez, Isabel; Arévalo Mora, Cristina María; Beltrán, A.M.; Kitzmantel, Michael; Neubauer, Erich; Pérez-Soriano, Eva María (MDPI, 2020-02)
    This study aims at the analysis of the reaction layer between titanium matrices and reinforcements: B4C particles and/or intermetallic TixAly. Likewise, the importance of these reactions was observed; this was particularly ...
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    A Structural Comparison of Ordered and Non-Ordered Ion Doped Silicate Bioactive Glasses  [Article]

    Schmitz, Seray; Beltrán, A.M.; Cresswell, Mark; Boccaccini, Aldo R. (MDPI, 2020-02)
    One of the key benefits of sol-gel-derived glasses is the presence of a mesoporous structure and the resulting increase in surface area. This enhancement in textural properties has a significant e ect on the physicochemical ...
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    Ceramic dies selection for electrical resistance sintering of metallic materials  [Article]

    Gómez Cuevas, Francisco de Paula; Andreouli, D.; Gallardo Fuentes, José María; Oikonomou, Vivi; Cintas Físico, Jesús; Torres Hernández, Yadir; Montes Martos, Juan Manuel (Elsevier, 2019)
    Processing metallic powders by electrical resistance sintering requires the use of insulating ceramics dies. Selecting the appropriate ceramic material according to the electrical, thermal and mechanical properties is a ...
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    Fracture toughness of cemented carbides obtained by electrical resistance sintering  [Article]

    Astacio López, Raquel; Gallardo Fuentes, José María; Cintas Físico, Jesús; Gómez Cuevas, Francisco de Paula; Prakash, Leo; Torres Hernández, Yadir (Elsevier, 2019)
    The unique combination of hardness, toughness and wear resistance exhibited by WC-Co cemented carbides (hardmetals) has made them a preeminent material choice for extremely demanding applications, such as metal cutting/forming ...
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    Directed Irradiation Synthesis as an Advanced Plasma Technology for Surface Modification to Activate Porous and “as-received” Titanium Surfaces  [Article]

    Civantos, Ana; Allain, Jean Paul; Pavón Palacio, Juan José; Shetty, Akshath; El-Atwani, Osman; Walker, Emily; Arias, Sandra L.; Gordon, Emily; Rodríguez-Ortiz, José Antonio; Chen, Mike; Torres Hernández, Yadir (MDPI, 2019)
    For the design of smart titanium implants, it is essential to balance the surface properties without any detrimental effect on the bulk properties of the material. Therefore, in this study, an irradiation-driven surface ...
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    Porous Titanium Cylinders Obtained by the Freeze-Casting Technique: Influence of Process Parameters  on Porosity and Mechanical Behavior  [Article]

    Trueba Muñoz, Paloma; Beltrán, A.M.; Bayo, José Manuel; Rodríguez-Ortiz, José Antonio; Larios Marín, Diego Francisco; Alonso Álvarez, Esteban; Dunand, David C.; Torres Hernández, Yadir (MDPI, 2020)
     The discrepancy between the stiffness of commercially pure titanium and cortical bone  tissue compromises its success as a biomaterial. The use of porous titanium has been widely studied,  however, it is still challengi ...
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    Porous Titanium surfaces to control bacteria growth: mechanical properties and sulfonated polyetheretherketone coating as antibiofounling approaches  [Article]

    Beltrán, A.M.; Civantos, Ana; Domínguez-Trujillo, Cristina; Moriche, R.; Rodríguez-Ortiz, José Antonio; García-Moreno, F.; Webster, Thomas J.; Kamm, Paul H.; Mesa Restrepo, Andrea; Torres Hernández, Yadir (MDPI, 2019)
    Here, titanium porous substrates were fabricated by a space holder technique. The relationship between microstructural characteristics (pore equivalent diameter, mean free-path between pores, roughness and contact surface), ...
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    Influence of the Compaction Pressure and Sintering Temperature on the Mechanical Properties of Porous Titanium for Biomedical Applications  [Article]

    Castillo, Sandra M.; Muñoz Moreno, Sergio; Trueba Muñoz, Paloma; Díaz, Eduardo; Torres Hernández, Yadir (MDPI, 2019)
    In the present work, the use of porous titanium is proposed as a solution to the difference in stiffness between the implant and bone tissue, avoiding the bone resorption. Conventional powder metallurgical technique is an ...
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    Balancing porosity and mechanical properties of titanium samples to favor cellular growth against bacteria  [Article]

    Civantos, Ana; Beltrán, A.M.; Domínguez-Trujillo, Cristina; Garvi Higueras, María Dolores; Lebrato Martínez, Julián; Rodríguez-Ortiz, José Antonio; García-Moreno, Francisco; Cauich-Rodríguez, Juan V.; Guzmán, Julio J.; Torres Hernández, Yadir (MDPI, 2019)
    Two main problems limit the success of titanium implants: bacterial infection, which restricts their osseointegration capacity; and the stiffness mismatch between the implant and the host cortical bone, which promotes bone ...
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    Development and implementation of a sequential compaction device to obtain radial graded porosity cylinders  [Article]

    Trueba Muñoz, Paloma; Chicardi Augusto, Ernesto; Rodríguez-Ortiz, José Antonio; Torres Hernández, Yadir (Elsevier, 2020)
    In this work, a sequential compaction device has been successfully developed and implemented to produce commercially pure titanium cylinders, in which the porosity increases from the core to the surface or vice versa. The ...
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    Amorphous Al-Ti Powders Prepared by Mechanical Alloying and Consolidated by Electrical Resistance Sintering  [Article]

    Urban, Petr; Ternero Fernández, Fátima Ángela; Caballero Sánchez, Eduardo; Nandyala, Sooraj; Montes Martos, Juan Manuel; Gómez Cuevas, Francisco de Paula (MDPI, 2019-10)
    A novel processing method for amorphous Al50Ti50 alloy, obtained by mechanical alloying and subsequently consolidated by electrical resistance sintering, has been investigated. The characterisation of the powders and the ...
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    Nature of the "Z"-phase in layered Na-ion battery cathodes  [Article]

    Somerville, James W.; Sobkowiak, Adam; Tapia-Ruiz, Nuria; Billaud, Juliette; Lozano Suárez, Juan Gabriel; House, Robert A.; Gallington, Leighanne C.; Ericsson, Tore; Häggström, Lennart; Roberts, Matthew R.; Maitra, Urmimala; Bruce, Peter G. (Royal Society of Chemistry, 2019-05-17)
    Layered sodium transition metal oxides with the P2 structure, e.g. Na2/3[Ni1/3Mn2/3]O2, are regarded as candidates for Na-ion battery cathodes. On charging, extraction of Na destabilizes the P2 phase (ABBA oxide ion stacking) ...
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    Effects of Boron Addition on the Microstructure and Mechanical Properties of (Ti,Ta)(C,N)-Co Based Cermets  [Article]

    Chicardi Augusto, Ernesto; Gotor Martínez, Francisco José (MDPI, 2019-07)
    In this work, a titanium–tantalum carbonitride based cermet, with cobalt as the binder phase and boron as a sintering additive, was developed by a mechanically induced self-sustaining reaction process using two different ...
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    Production of Ultrafine Grained Hardmetals by Electrical Resistance Sintering  [Article]

    Cintas Físico, Jesús; Astacio López, Raquel; Gómez Cuevas, Francisco de Paula; Montes Martos, Juan Manuel; Weissgaerber, Thomas; Lagos, Miguel Ángel; Torres Hernández, Yadir; Gallardo Fuentes, José María (MDPI, 2019-02)
    In this work, powders of cemented ultrafine WC-6 wt.% Co were consolidated. The feasibility of the medium frequency electrical resistance sintering (MF-ERS) technique were studied to prevent WC grain growth during ...
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    Development of Surface-Coated Polylactic Acid/Polyhydroxyalkanoate (PLA/PHA) Nanocomposites  [Article]

    Relinque, J. J.; León, A. S. de; Hernández-Saz, J.; García-Romero, M. G.; Navas-Martos, Francisco J.; Morales-Cid, G.; Molina, S. I. (Multidisciplinary Digital Publishing Institute (MDPI), 2019-03-01)
    This work reports on the design and development of nanocomposites based on a polymeric matrix containing biodegradable Polylactic Acid (PLA) and Polyhydroxyalkanoate (PHA) coated with either Graphite NanoPlatelets (GNP) ...
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    Manufacturing optimisation of an original nanostructured (beta + gamma)-TiNbTa material  [Article]

    García Garrido, Cristina; Gutierrez-Gonzalez, C.F.; Torrecillas, Ramón; Pérez Pozo, Luis; Salvo, Christopher; Chicardi Augusto, Ernesto (Elsevier Editora Ltda, 2019)
    An original (beta + gamma)-TiNbTa material was manufactured by an optimised powder metallurgy treatment, based on a mechanical alloying (MA) synthesis, carried out at low energy, and a subsequently field assisted consolidation ...
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    Supervised Land Use Inference from Mobility Patterns  [Article]

    Caceres, Noelia; Benitez, Francisco G. (Hindawi Limited, 2018)
    This paper addresses the relationship between land use and mobility patterns. Since each particular zone directly feeds the global mobility once acting as origin of trips and others as destination, both roles are simultaneously ...
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    Designing bioactive porous titanium interfaces to balance mechanical properties and in vitro cells behavior towards increased osseointegration  [Article]

    Civantos, Ana; Domínguez-Trujillo, Cristina; Juliana Pino, Raisa; Setti, Giulia; Pavón Palacio, Juan José; Martínez-Campos, Enrique; García-García, Francisco J.; Rodríguez-Ortiz, José Antonio; Allain, Jean Paul; Torres Hernández, Yadir (Elsevier, 2019)
    Titanium implant failures are mainly related to stress shielding phenomenon and the poor cell interaction with host bone tissue. The development of bioactive and biomimetic Ti scaffolds for bone regeneration remains a ...
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    Bioactive Coatings on Porous Titanium for Biomedical Applications  [Article]

    Domínguez-Trujillo, Cristina; Ternero Fernández, Fátima; Rodríguez-Ortiz, José Antonio; Heise, S.; Boccaccini, Aldo R.; Lebrato Martínez, Julián; Torres Hernández, Yadir (Elsevier, 2018)
    Commercial pure titanium is a recognized and accepted material for cortical bone tissue substitution. However, stress-shielding phenomena and lack of osseointegration result in significant limitations. This work is focused ...
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    Hard Metal Production by ERS: Processing Parameter Roles in Final Properties  [Article]

    Gallardo Fuentes, José María; Agote, Íñigo; Astacio López, Raquel; Schubert, Thomas; Cintas Físico, Jesús; Montes Martos, Juan Manuel; Torres Hernández, Yadir; Gómez Cuevas, Francisco de Paula (MDPI, 2019)
    Cemented carbide is a hard composite material, used widely in a variety of industries. The value of the global tungsten carbide market is expected to grow by 4.4% (compound annual growth rate) from 2017 to 2022. One of the ...

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