Now showing items 1-20 of 20

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      Biotribological behavior of Ag-ZrCxN1-x coatings against UHMWPE for joint prostheses devices  [Article]

      Calderon, V.S.; Sánchez López, Juan Carlos; Cavaleiro, A.; Carvalho, S. (Elsevier, 2015)
      This study aims to evaluate the structural, mechanical and tribological properties of zirconium carbonitrides (ZrCxN1-x) coatings with embedded silver nanoparticles, produced with the intention of achieving a material with ...
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      Chemical and microstructural characterization of (Y or Zr)-doped CrAlN coatings  [Article]

      Rojas Ruiz, Teresa Cristina; El Mrabet, Said; Domínguez Meister, Santiago; Brizuela, Marta; García Luis, Alberto; Sánchez López, Juan Carlos (Elsevier, 2012)
      Magnetron sputtered chromium aluminium nitride films are excellent candidates for advanced machining and protection for high temperature applications. In this work CrAlN-based coatings including Y or Zr as dopants (≈ 2 ...
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      Comparative Study of Micro- and Nano-structured Coatings for High-Temperature Oxidation in Steam Atmospheres  [Article]

      Sánchez López, Juan Carlos; Mato, S; Pérez, F. J; Hierro, M. P; Castañeda, S.I.; Escobar-Galindo, Ramón (Springer Verlag, 2014)
      For many high-temperature applications, coatings are applied in order to protect structural materials against a wide range of different environments: oxidation, metal dusting, sulphidation, molten salts, steam, etc. The ...
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      Dependence of exchange anisotropy and coercivity on the Fe–oxide structure in oxygen-passivated Fe nanoparticles  [Article]

      Prados, C.; Multigner, M.; Hernando, Antonio; Sánchez López, Juan Carlos; Fernández Camacho, Asunción; Conde Amiano, Clara Francisca; Conde Amiano, Alejandro (American Institute of Physics, 1999)
      Ultrafine Fe particles have been prepared by the inert gas condensation method and subsequently oxygen passivated. The as-obtained particles consist in an Fe core surrounded by an amorphous Fe-oxide surface layer. The ...
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      Estudio de metales y sulfuros nanocristalinos preparados por evaporación en atmósfera de gas inerte  [PhD Thesis]

      Sánchez López, Juan Carlos (1998-12-21)
      El principal objetivo de esta Tesis ha sido la síntesis de materiales nanocristalinos en forma de polvos ultrafinos por el método de evaporación en gas inerte, profundizando en cada caso en su caracterización (morfológica, ...
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      Evidence of spin disorder at the surface–core interface of oxygen passivated Fe nanoparticles  [Article]

      Bianco, Lucia del; Hernando, A.; Multigner, M.; Prados, Clara; Sánchez López, Juan Carlos; Fernández, A.; Conde Amiano, Clara Francisca; Conde Amiano, Alejandro (AIP Publishing, 1998)
      Hysteresis, thermal dependence of magnetization, and coercivity of oxide coated ultrafine Fe particles prepared by inert gas condensation and oxygen passivation have been studied in the 5–300 K range. The results are ...
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      Exploring the benefits of depositing hard TiN thin films by non-reactive magnetron sputtering  [Article]

      Martínez Martínez, Diego; López Cartes, Carlos; Fernández Camacho, Asunción; Sánchez López, Juan Carlos (Elsevier, 2013)
      The aim of this paper is to compare the mechanical and tribological properties of TiN coatings prepared in a conventional magnetron sputtering chamber according to two different routes: the usual reactive sputtering of a ...
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      Extended X-ray absorption fine structure (EXAFS) investigations of Ti bonding environment in sputter-deposited nanocomposite TiBC/a-C thin films  [Article]

      Endrino, José Luis; Abad, Manuel D.; Gago, Raúl; Horwat, D.; Jiménez, I.; Sánchez López, Juan Carlos (Institute of Physics Publishing, 2014)
      In this study, we have successfully used the extended X-ray absorption fine structure (EXAFS) technique at the Ti-K edge to extract the local structure in a set of nanocomposite TiBC/a-C coatings deposited by a combined ...
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      High N-content a-C:N films elaborated by femtosecond PLD with plasma assistance  [Article]

      Sánchez López, Juan Carlos; Rojas Ruiz, Teresa Cristina; Maddi, C.; Loir, A.-S.; Tite, T.; Barnier, V.; Wolski, K.; Garrelie, F (Elsevier, 2015)
      Amorphous carbon nitride (a-C:N) thin films are a interesting class of carbon-based electrode materials. Therefore, synthesis and characterization of these materials have found lot of interest in environmental analytical ...
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      Hydrogen Storage Mechanisms in Mg-based nanocrystalline materials  [PhD Thesis]

      Friedrichs, Oliver (2006-12)
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      Influence of silver content on the tribomechanical behavior on Ag-TiCN bioactive coatings  [Article]

      Sánchez López, Juan Carlos; Abad, Manuel D.; Carvalho, I; Escobar Galindo, R.; Benito, N; Ribeiro, S; Henriques, M.; Cavaleiro, A.; Carvalho, S. (Elsevier, 2012)
      urface modification of bulk materials used in biomedical applications has become an important prerequisite for better biocompatibility. In particular, to overcome the particle generation, low-wear coatings based on carbon ...
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      Magnetic and microstructural analysis of palladium nanoparticles with different capping systems  [Article]

      Litrán Ramos, Rocío; Sampedro, Blanca; Rojas Ruiz, Teresa Cristina; Multigner, Marta; Sánchez López, Juan Carlos; Crespo, Patricia; López Cartes, Carlos; García García, Miguel Ángel; Hernando, Antonio; Fernández Camacho, Asunción (American Physical Society, 2006)
      Palladium nanoparticles capped with different protective systems in a size range between 1.2 and 2.4 nm have been obtained by varying the preparation chemical method. Magnetization curves for all the samples show hysteresis ...
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      Nanoscale mechanically induced structural and electrical changes in Ge 2Sb 2Te 5 films  [Article]

      Cecchini, R.; Benítez Jiménez, José Jesús; Sánchez López, Juan Carlos; Fernández Camacho, Asunción (American Institute of Physics, 2012)
      We demonstrate that the microstructure and electrical properties of Ge 2Sb 2Te 5 films can be changed by a nanoscale mechanical process. Nanoscratching is used to define modified areas onto an as-deposited crystalline Ge ...
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      Phase composition and tribomechanical properties of Ti–B–C nanocomposite coatings prepared by magnetron sputtering  [Article]

      Brizuela, Marta; García Luis, Alberto; Endrino, José Luis; Gago, Raúl; Justo Erbez, Ángel J.; Abad Roldán, Manuel David; Sánchez López, Juan Carlos (IOP Publishing, 2012)
      Protective nanocomposite coatings based on hard ceramic phases (TiC, TiB2) combined with amorphous carbon (a-C) are of interest because of their adequate balance between mechanical and tribological performances. In this ...
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      Recubrimientos protectores nanoestructurados preparados por magnetron sputtering  [PhD Thesis]

      Domínguez Meister, Santiago (2016-11-17)
      La presente tesis ha consistido en la obtención de materiales en forma de película delgada con propiedades protectoras con la finalidad de ser utilizados en distintas aplicaciones: lubricantes, biológicas y resistencia a ...
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      Role of Y in the oxidation resistance of CrAlYN coatings  [Article]

      Sánchez López, Juan Carlos; Rojas Ruiz, Teresa Cristina; Brizuela, Marta; Justo, A.; Jiménez de Haro, María del Carmen; Mariscal, Antonio; Escobar-Galindo, Ramón; El Mrabet, Said; Domínguez Meister, Santiago (Elsevier, 2015)
      CrAlYN coatings with different aluminum (4–12 at.%) and yttrium (2–5 at.%) contents are deposited by d.c. reactive magnetron sputtering on silicon and M2 steel substrates using metallic targets and Ar/N2 mixtures. The ...
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      Solid lubricant behavior of MoS2 and WSe2-based nanocomposite coatings  [Article]

      Domínguez Meister, Santiago; Rojas Ruiz, Teresa Cristina; Brizuela, Marta; Sánchez López, Juan Carlos (National Institute for Materials Science, 2017)
      Tribological coatings made of MoS2 and WSe2 phases and their corresponding combinations with tungsten carbide (WC) were prepared by non-reactive magnetron sputtering of individual targets of similar composition. A comparative ...
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      Synthesis and tribological properties of WSex films prepared by magnetron sputtering  [Article]

      Domínguez Meister, Santiago; Justo Erbez, Ángel J.; Sánchez López, Juan Carlos (Elsevier, 2013)
      WSex films with variable Se/W ratio were deposited by non-reactive r.f. magnetron sputtering from WSe2 target changing the applied d.c. pulsed bias conditions and substrate temperature. The structural and chemical properties ...
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      Tribological behaviour at high temperature of hard CrAlN coatings doped with y or Zr  [Article]

      Sánchez López, Juan Carlos; Contreras, A; Domínguez Meister, Santiago; García Luis, Alberto; Brizuela, Marta (Elsevier, 2014)
      The tribological properties of CrAlN, CrAlYN and CrAlZrN coatings deposited by direct current reactive magnetron sputtering are studied by means of pin-on-disc experiments at room temperature, 300, 500 and 650 C using ...
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      Tribological comparison of different C-based coatings in lubricated and unlubricated conditions  [Article]

      Ciarsolo, I; Fernández, X; Ruíz de Gopegui, U.; Zubizarreta, C.; Abad, Manuel D.; Mariscal, A.; Caretti, Ignacio; Jiménez, I; Sánchez López, Juan Carlos (Elsevier, 2014)
      The use of carbon-based coatings (hydrogenated and non-hydrogenated DLC, doped and alloyed-DLC) is of wide interest due to its applications in mechanical components submitted to friction and wear including sliding parts ...