Recent Submissions

  • Substrate surface finish effects on scratch resistance and failure mechanisms of TiN-coated hardmetals 

    Yang, Jing; Roa Rovira, Joan Josep; Oden, M; Johansson Joesaar, M.P; Esteve, Joan; Llanes Pitarch, Luis Miguel (Elsevier, 2015-03-15)
    Article
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    In this study, the influence of substrate surface finish on scratch resistance and associated failure mechanisms is investigated in the case of a TiN-coated hardmetal. Three different surface finish conditions are studied: ...
  • Fracture toughness of cemented carbides: Testing method and microstructural effects 

    Sheikh, Saad; M'Saoubi, Rachid; Flasar, Petr; Schwind, Martin; Persson, Tomas; Yang, Jing; Llanes Pitarch, Luis Miguel (2015-03-01)
    Article
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    Fracture toughness is one the most important parameters for design applications and performance assessment of WC-Co cemented carbides (hardmetals). Different from hardness, fracture toughness is commonly a property more ...
  • Fracture and fatigue behavior of WC-Co and WC-CoNi cemented carbides 

    Tarragó Cifre, Jose María; Roa Rovira, Joan Josep; Valle, Vladimir; Marsahll, J. M.; Llanes Pitarch, Luis Miguel (2015-03-01)
    Article
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    The fracture and fatigue characteristics of several cemented carbide grades are investigated as a function of their microstructure. In doing so, the influence of binder chemical nature and content (Co and 76 wt.% Co-24 ...
  • Chemical introduced disorder effects on the critical current density and pinning mechanisms of YBa2-XSrXCu3O7-¿ 

    Flores, R. L.; Vieira, Valdemar das Neves; Teixeira Dias, Fábio; Pureur, P; Schaf, Jacob; Hneda, M; Roa Rovira, Joan Josep (2016)
    Article
    Open Access
    We report on isotherm ( T = 77.5 K) DC magnetization hysteresis loops of a series of YBa 2 -x Sr x Cu 3 O 7 - ¿ (x = 0, 0.02, 0.1, 0.25 and 0.37) single crystals with the purpose of studying the influence of chemically ...
  • Comparison between the magnetic irreversibility and zero resistance of high-quality melt-processed ybacuo superconductors 

    Teixeira Dias, Fábio; Vieira, Valdemar das Neves; Wolff-Fabris, Frederik; Kampert, Erik; Hneda, M; Schaf, Jacob; Farinela, G; Paiva Gouvêa, Cristol de; Roa Rovira, Joan Josep (2016)
    Article
    Open Access
    This paper portrays a detailed study of the magnetic irreversibility limit Tirr (H) and of the zero resistance point Tc0 (H) of three different top-seeding melt-textured YBa2Cu3O7-d superconducting samples, with well-aligned ...
  • Applied scientific method in the laboratory 

    Amante García, Beatriz; Martínez Martínez, María del Rosario; Cadenato Matia, Ana María; Gallego Fernández, María Isabel; Salán Ballesteros, Maria Núria (Tempus Publications, 2011)
    Article
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  • RIMA project: activities and initiatives communion and sharing in educational innovation at UPC-BarcelonaTech 

    Salán Ballesteros, Maria Núria; Martínez Martínez, María del Rosario; Portet Cortés, Esperanza; Torra Bitlloch, Immaculada (2012)
    Article
    Open Access
    The RIMA project (Research and Innovation in Learning Methodologies, http://www.upc.edu/rima) is a proposal from Education Science Institute (ICE) of the (UPC-BARCELONATECH). The aim of this project is to become a forum ...
  • Resistencia mecánica de carburos cementados: influencia de la temperatura y la microestructura 

    Moyano, I; Bermejo, Raul; Salán Ballesteros, Maria Núria; Chicardi, E; Gotor Martínez, Francisco José; Llanes Pitarch, Luis Miguel; Torres Hernandez, Yadir (2015-04)
    Article
    Open Access
    En esta investigación se ha evaluado el efecto de la temperatura en la resistencia mecánica de carburos cementados (WC-Co) con diferente camino libre medio de la fase ligante. La misma se determinó a 600°C con discos ...
  • Plastic deformation and damage induced by fatigue inTWIP steels 

    Roa Rovira, Joan Josep; Fargas Ribas, Gemma; Calvo Muñoz, Jessica; Jiménez Piqué, Emilio; Mateo García, Antonio Manuel (2015-03-03)
    Article
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    Twinning Induced Plasticity steels exhibit a high strain hardening rate which translates into a remarkable combination of ductility and strength. A thorough experimental approach was performed by advanced characterization ...
  • Nanoindentation and scratch resistance of multilayered TiO2-SiO2 coatings with different nanocolumnar structures deposited by PV-OAD 

    Roa Rovira, Joan Josep; Rico, V.; Oliva-Ramírez, M; Gonzalez-Elipe, A.R.; Jiménez Piqué, Emilio (2016)
    Article
    Restricted access - publisher's policy
    This paper presents a study of the mechanical properties and an evaluation of damage mechanisms of nanocolumnar TiO2-SiO2 multilayer coatings prepared by physical vapour oblique angle deposition at different configurations ...

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