Exploració per autor "Roa Rovira, Joan Josep"
Ara es mostren els items 21-40 de 185
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Comportamento irreversível da magnetizaçao do YBaCuO texturizado
Mendoza, R. M. N.; Vieira, Valdemar das Neves; Silva, D. L. da; Roa Rovira, Joan Josep; Wolff-Fabris, Frederik; Teixeira Dias, Fábio (2014)
Comunicació de congrés
Accés obert -
Comportamiento mecánico de materiales masivos supercondcutores de segunda generación en función de la temperatura
Konstantopoulou, K.; Pastor, J.Y.; Roa Rovira, Joan Josep; Segarra, M. (2010-07-01)
Article
Accés obertEn este trabajo se han analizado dos materiales masivos superconductores de base YBaCuO, con el objetivo de estudiar la influencia del método de procesado (método Bridgman y método Top-Seeding Melt Growth) y de la temperatura ... -
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
Accés restringit per política de l'editorialIn 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 ... -
Contact fatigue behavior of a-Al2O3-Ti(C,N) CVD coated WC-Co under dry and wet conditions
Sosa, Amadeo Daniel; Collado Ciprés, Verónica; García, José; Escalada, Lisandro; Roa Rovira, Joan Josep; Soldera, Flavio; Brühl, Elisabeth; Llanes Pitarch, Luis Miguel; Simison, Sílvia Noemí (2021-02-01)
Article
Accés obertThe response to cycling contact fatigue load of a WC-6%Co carbide coated with a Ti(C,N)/a-Al2O3 CVD multilayer was investigated in dry and wet conditions. Imprints in dry conditions were characterized by small thin cracks ... -
Contact fatigue behaviour of CVD coated cemented carbides in dry and wet conditions
Collado Ciprés, Verónica; Dalibon Bähler, Eugenia Laura; Escalada, Lisandro; Roa Rovira, Joan Josep; Jiménez Piqué, Emilio; Soldera, Flavio; Brühl, Sonia P.; Simison, Sílvia Noemí; Llanes Pitarch, Luis Miguel; Sosa, Amadeo Daniel (2022-03-15)
Article
Accés obertCycling contact fatigue indentation tests in dry and wet conditions were conducted in cemented carbides CVD-coated with Ti(C,N)/a-Al2O3 and Zr(C,N)/a-Al2O3 systems. In dry contact experiments, all imprints presented a ... -
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
Accés restringit per política de l'editorialThe 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. ... -
Correlation between electrical and mechanical properties in La1-xSrxGa1-yMgyO3-d 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
Accés restringit per política de l'editorialThe 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. ... -
Correlation between microstructure and mechanical properties before and after reversion of metastable austenitic stainless steels
Fargas Ribas, Gemma; Zapata, Ana; Roa Rovira, Joan Josep; Sapezanskaia, Ina; Mateo García, Antonio Manuel (2015)
Article
Accés obertReversion treatments are a way to improve the mechanical response of metastable austenitic stainless steels by means of grain refinement. To effectively apply those treatments, the steel must be previously deformed to ... -
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
Accés restringit per política de l'editorialThe 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 ... -
Corrosion damage in WC-Co cemented carbides: Residual strength assessment and 3D FIB-FESEM tomography characterization
Tarragó Cifre, Jose María; Fargas Ribas, Gemma; Jiménez Piqué, Emilio; Felip, Alba; Isern, Lluis; Coureaux Mustelier, David; Al-Dawery, Ihsan; Roa Rovira, Joan Josep; Fair, Jonathan; Llanes Pitarch, Luis Miguel (2014)
Text en actes de congrés
Accés obertThe 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 ... -
Corrosion induced degradation of textured YBCO under operation in high humidity conditions
Roa Rovira, Joan Josep; Jiménez Piqué, Emilio; Díaz, Jordi A.; Morales, Manuel; Calleja Lázaro, Albert; Segarra, M. (2012-05-25)
Article
Accés restringit per política de l'editorialThe early stages of aggressive degradation at 85% of humidity for 24 h of single crystals of YBa2Cu3O7 − δ textured by Bridgman technique have been analyzed by means of atomic force microscopy, X-ray photoelectron spectroscopy, ... -
Curva tensión-deformación mediante indentación esférica para materiales cerámicos superconductores de YBCO-TSMG
Roa Rovira, Joan Josep; Morales, Miguel; Martínez, Mónica; Capdevila, X.G.; Segarra, M. (Universidad de Cantabria, 2009)
Comunicació de congrés
Accés obertLos materiales superconductores, son ampliamente utilizados en el campo de la medicina (RMN, SQUID), para el transporte de corriente (limitadores de corriente), etc. El desconocimiento de sus propiedades mecánicas tales ... -
Cyclic contact fatigue of cemented carbides under dry and wet conditions: Correlation between microstructure, damage and electrochemical behavior
Roa Rovira, Joan Josep; Simison, Sílvia Noemí; Grasso, J.; Arcidiacono, M.; Escalada, Lisandro; Soldera, Flavio; García, José; Sosa, Amadeo Daniel (2020-11-01)
Article
Accés obertThe correlation between the damage induced under cyclic contact fatigue and their electrochemical behavior (anodic polarization curves) for different WC-Co-based cemented carbides grades was investigated at the macrometric ... -
Deformation kinetics of a TRIP steel determined by in situ high-energy synchrotron X-ray diffraction
Barriobero Vila, Pere; Jerez Mesa, Ramón; Guitar, Agustina; Gavaldà Díaz, O; Travieso Rodríguez, José Antonio; Stark, A; Schell, N.; Llumà Fuentes, Jordi; Fargas Ribas, Gemma; Mateo García, Antonio Manuel; Roa Rovira, Joan Josep (2021-12-09)
Article
Accés obertThe microstructure design and the development of predictive approaches exploiting the transformation-induced plasticity (TRIP) effect require a keen understanding of the kinetics governing the strain-induced martensitic ... -
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
Accés restringit per política de l'editorialAdvanced 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 ... -
Deformation mechanisms induced by nanoindentation tests on a metastable austenitic stainless steel: a FIB/SIM investigation
Sapezanskaia, Ina; Roa Rovira, Joan Josep; Fargas Ribas, Gemma; Turón Viñas, Miquel; Trifonov, T.; Kouitat Njiwa, R.; Redjaïmia, A.; Mateo García, Antonio Manuel (2017-09)
Article
Accés obertMetastable austenitic stainless steels are materials that can undergo austenite to martensite phase transformation when subjected to deformation and thus they represent a multiphase material with interesting mechanical ... -
Deformation mechanisms induced under high cycle fatigue tests in a metastable austenitic stainless steel
Roa Rovira, Joan Josep; Fargas Ribas, Gemma; Jiménez Piqué, Emilio; Mateo García, Antonio Manuel (2014)
Article
Accés restringit per política de l'editorialAdvanced 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 ... -
Deformation of polycrystalline TRIP stainless steel micropillars
Roa Rovira, Joan Josep; Wheeler, J.M.; Trifonov, T.; Fargas Ribas, Gemma; Mateo García, Antonio Manuel; Michler, J; Jiménez Piqué, Emilio (2015)
Article
Accés obertThe deformation mechanisms of the metastable austenite phase of a transformation induced plasticity (TRIP) stainless steel, AISI 301LN, have been investigated by compression of multicrystalline micropillars of different ... -
Dependence of nanoindentation hardness with crystallographic orientation of austenite grains in metastable stainless steels
Roa Rovira, Joan Josep; Fargas Ribas, Gemma; Mateo García, Antonio Manuel; Jiménez Piqué, Emilio (2015-10-01)
Article
Accés restringit per política de l'editorialThe mechanical behaviour of a metastable austenitic stainless steel has been studied by means of nanoindentation of individual grains. Hardness, elastic modulus and estimation of wear resistance were determined as a function ... -
Depth-sensing indentation applied to polymers: A comparison between standard methods of analysis in relation to the nature of the materials
Giró Paloma, Jessica; Roa Rovira, Joan Josep; Díez Pascual, Ana Maria; Rayón Encinas, Emilio; Flores Aguilar-Amat, Araceli; Martínez López, Monica; Chimenos Ribera, Josep Maria; Fernández Renna, Ana Inés (2013)
Article
Accés restringit per política de l'editorialMechanical data (hardness and elastic modulus) from instrumented indentation testing are often extracted assuming linear elasticity in the initial portion of the unloading. The method is nowadays widely accepted as a ...