Recent Submissions

  • Nanoindentation and fracture toughness of nanostructured zirconia/multi-walled carbon nanotube composites 

    Melk, Latifa; Roa Rovira, Joan Josep; García Marro, Fernando; Antti, Marta-Lena; Milsom, Ben; Reece, Michel; Anglada Gomila, Marcos Juan (2015-03-01)
    Article
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    Multi-walled carbon nanotubes (MWCNTs)/3 mol% yttria-doped tetragonal zirconia (3Y-TZP) composites were produced using spark plasma sintering (SPS) with MWCNT content ranging within 0-2 wt%. In the present paper, it was ...
  • Effect of the filler on the nanomechanical properties of polypropylene in contact with paraffinic phase change material 

    Giró Paloma, Jessica; Rayón Encinas, Emilio; Roa Rovira, Joan Josep; Martínez López, Monica; Fernández Renna, Ana Inés (2015)
    Article
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    As the changes on the mechanical properties with depth of indentation provide valuable information that may be suitable for design purposes, nanoindentation is an adequate technique for investigating the nanomechanical ...
  • Plastic deformation and damage induced by fatigue in twip steels 

    Roa Rovira, Joan Josep; Fargas Ribas, Gemma; Calvo Muñoz, Jessica; Jiménez Piqué, Emilio; Mateo García, Antonio Manuel (2015)
    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 ...
  • Hardness of FRHC-Cu Determined by Statistical Analysis 

    Roa Rovira, Joan Josep; Martínez López, Mónica; Rayón Encinas, Emilio; Ferrer Cruselles, Núria; Espiell Álvarez, Ferran; Segarra Rubi, Merce (2014-02)
    Article
    Open Access
    A statistical indentation method has been employed to study the hardness value of fire-refined high conductivity copper, using nanoindentation technique. The Joslin and Oliver approach was used with the aim to separate ...
  • 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 (Academic World Education & Research Center, 2012)
    Conference report
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    The RIMA project (Research and Innovation in Learning Methodologies, http://www.upc.edu/rima) is a proposal from Education Science Institute (ICE) of the Universitat Politècnica de Catalunya (UPC-BARCELONATECH). The aim ...
  • Contact damage and fracture micromechanism of multilayered TiN/CrN coatings at micro- and nano-length scales 

    Roa Rovira, Joan Josep; Jiménez Piqué, Emilio; Martínez, R; Ramírez Sandoval, Giselle; Tarragó, Josep Maria; Rodríguez, R; Llanes Pitarch, Luis Miguel (2014)
    Article
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    In this study, systematic nanomechanical andmicromechanical studies have been conducted in threemultilayer TiN/CrN systems with different bilayer periods (8, 19 and 25 nm). Additionally, experimental work has been ...
  • Deformation mechanism induced under high cycle fatigue test in a metaestable austenitic stainless steel 

    Roa Rovira, Joan Josep; Fargas Ribas, Gemma; Jiménez Piqué, Emilio; Mateo García, Antonio Manuel (2014)
    Article
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    Advanced techniques were used to study the deformation mechanisms induced by fatigue tests in a metastable austenitic stainless steel AISI 301LN. Observations by Atomic Force Microscopy were carried out to study the evolution ...
  • Correlation between electrical and mechanical properties in La1-XSrXGa1-YMgYO3-¿ ceramics used as electrolytes for solid oxide fuel cells 

    Morales Comas, Miguel; Roa Rovira, Joan Josep; Pérez Falcón, José Manuel; Moure Arroyo, Alberto; Tartaj, Jesus; Espiell Álvarez, Ferran; Segarra Rubi, Merce (2014)
    Article
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    The relation between the electrical and the mechanical properties in Sr and Mg doped LaGaO3 ceramics, which can be used as electrolyte for solid oxide fuel cells, was investigated in terms of hardness and ionic conductivity. ...
  • Corrosion damage in WC-Co cemented carbides: residual strength assessment and 3D FIB-FESEM tomography characterisation 

    Tarragó Cifre, Jose María; Fargas Ribas, Gemma; Jiménez Piqué, Emilio; Felip, Alba; Isern, Lluis; Coureaux Mustelier, David; Roa Rovira, Joan Josep; Al-Dawery, Ihsan; Fair, Jonathan; Llanes Pitarch, Luis Miguel (2014-12-01)
    Article
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    The effect of corrosion damage on cemented carbides was investigated. The study included residual strength assessment and detailed fractographic inspection of corroded specimens as well as detailed 3D FIB-FESEM tomography ...
  • Low Sr doping effects on critical current density and pinning mechanism of YBa2Cu3O7-x single crystals 

    Lopes, R.F.; Vieira, Valdemar das Neves; Teixeira Dias, Fábio; Silva, D.L.da; Pureur, P; Schaf, J; Roa Rovira, Joan Josep (Institute of Physics (IOP), 2014)
    Article
    Open Access
    We report on isotherm dc magnetization hysteresis loops, M(H) to 70K ¿ T ¿ 82.5K of YBa2-xSrxCu3O7-x (x = 0, 0.02 and 0.1) single crystals with the purpose to study the influence of the low Sr doping effects on the YBa2Cu3O7-¿ ...

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