Ara es mostren els items 1-20 de 29

    • Corrosion resistance of crystalline and amorphous CuZr alloys in NaCl aqueous environment and effect of corrosion inhibitors 

      Xie, Chenyang; Milosev, Ingrid; Renner, Frank U.; Kokalj, Anton; Bruna Escuer, Pere; Crespo Artiaga, Daniel (2021-10-25)
      Article
      Accés obert
      CuZr alloys are the basis of a family of metallic glasses with large glass forming ability and remarkable mechanical properties. The corrosion response of prepared crystalline and amorphous CuxZr100-x alloys (x = 40, 50, ...
    • Curs 0: preparació per als estudis a l’EEBE 

      Tornil Sin, Sebastián; Botey Cumella, Muriel; Alarcón Jordán, Marta; Alcaraz Sendra, Olga; Ametller Congost, Lluís; Bruna Escuer, Pere; Camps Anaya, Germinal; Carmona Mejías, Ángeles; Claverol Aguas, Mercè; Crespo Artiaga, Daniel; Pablo Ribas, Joan de; Barrio Casado, María del; Valle Mendoza, Luis Javier del; Encinas Bachiller, Andrés Marcos; Farran Marsà, Adriana; Florido Pérez, Antonio; Gámez López, Antonio; García Senz, Domingo; Gibert Agulló, Oriol; Ikhouane, Fayçal; Jiménez Jiménez, María José; José Pont, Jordi; Linares Alegret, Manuel; Lloveras Muntané, Pol Marcel; López López, José; Macovez, Roberto; Mas Blesa, Albert; Mitjana Riera, Margarida; Muñoz Romero, José; Pardo Soto, Luis Carlos; Periago Oliver, M. Cristina; Pineda Soler, Eloi; Pradell Cara, Trinitat; Ruiz Ordóñez, Magda; Sala Cladellas, Glòria; Soler Turu, Lluís; Tamarit Mur, José Luis; Vendrell Villafruela, Xavier; Zanuy Gomara, David (Universitat Politècnica de Catalunya. Institut de Ciències de l'Educació, 2022-05)
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      Aquest article presenta el desenvolupament i primers resultats d'ús d'un conjunt de cursos virtuals que pretenen proporcionar uns coneixements inicials bàsics de Matemàtiques, Física i !ímica als estudiants que accedeixen ...
    • Effect of minor Co additions on the crystallization and magnetic properties of Fe(Co)NbBCu alloys 

      Torrens Serra, Joan; Bruna Escuer, Pere; Roth, Segmar; Rodríguez Viejo, Javier; Clavaguera Mora, Maria Teresa (2010)
      Article
      Accés obert
      The effect of partial replacement of Fe by Co (up to 8 %) on thermal stability, structure and magnetic properties of FeNbBCu alloys has been explored in this paper. The results indicate that Co reduces the stability against ...
    • Effect of Si and B on the electrochemical behavior of FeCoNiCr-based high-entropy amorphous alloys 

      Panahi, Seyedeh Leila; Bruna Escuer, Pere; Pineda Soler, Eloi (Multidisciplinary Digital Publishing Institute (MDPI), 2022-12-13)
      Article
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      The ability to produce high-entropy alloys with an amorphous structure, so-called high-entropy metallic glasses (HEMGs), offers the possibility to produce new compositions with good mechanical properties and resistance to ...
    • Evaluation of the Effect of Minor Additions in the Crystallization Path of [(Fe0.5Co0.5)0.75B0.2Si0.05]100-xMx Metallic Glasses by Means of Mössbauer Spectroscopy 

      Panahi, Seyedeh Leila; Ramasamy, Parthiban; Masdeu, F; Stoica, Mihai; Torrens Serra, Joan; Bruna Escuer, Pere (Multidisciplinary Digital Publishing Institute (MDPI), 2021-08-16)
      Article
      Accés obert
      Understanding the crystallization of metallic glasses is fundamental in the design of new alloys with enhanced properties and better glass-formability. The crystallization of a series of Fe-based metallic glasses of ...
    • Fe in P-doped basaltic melts: a Mössbauer spectroscopy study 

      Tarragó Aymerich, Mariona; García-Vallès, Maite; Méndez Martínez, Salvador; Pradell Cara, Trinitat; Bruna Escuer, Pere (2018-10-01)
      Article
      Accés obert
      The addition of P to a basalt causes a change in the environment of Fe. At low P contents iron is located in the glass structure and the Fe3+/Fe2+ ratio is about 80/20. Further addition of P causes a collapse of the glass ...
    • Fragility measurement of Pd-based metallic glass by dynamic mechanical analysis 

      Pineda Soler, Eloi; Serrano Gutiérrez, Jorge; Bruna Escuer, Pere; Crespo Artiaga, Daniel (2010-08)
      Article
      Accés restringit per política de l'editorial
      The measurement of fragility of glass-forming liquids involves either the determination of viscosity at different temperatures above the glass transition or the measurement of the dynamic glass–liquid transition by ...
    • Glass-formation and corrosion properties of Fe-Cr-Mo-C-B glassy ribbons with low Cr content 

      Madinehei, Seyed Milad; Bruna Escuer, Pere; Duarte Correa, María Jazmín; Pineda Soler, Eloi; Klemm, Julia; Renner, Frank U. (2014-12-05)
      Article
      Accés obert
      The effect of low amounts of Cr on glass forming ability and corrosion behavior of Fe(65-x)CrxMo14C15B6 (x = 0, 2, 4, 6, 8,10 at.%) ribbons have been studied. It was found that the reduced glass transition temperature ...
    • Glass-forming ability and microstructural evolution of [(Fe0.6Co0.4)0.75Si0.05B0.20]96-xNb4Mx metallic glasses studied by Mössbauer spectroscopy 

      Torrens Serra, Joan; Bruna Escuer, Pere; Stoica, Mihai; Eckert, Jurgen (2017-05-15)
      Article
      Accés obert
      The effect of minor transition metals and rare earths on glass-forming ability, thermal stability and crystallization of [(Fe0.6Co0.4)0.75Si0.05B0.20]96-xNb4Mx alloys was investigated. The thermodynamic parameters traditionally ...
    • Influence of a magnetic field applied during the quenching process on the spin density and nanoscale structure of an amorphous Fe-B ribbon 

      Bonastre, J.; Suñol Martinez, Juan Jose; Bruna Escuer, Pere; Sato, K.; Santos, J.D.; Hernando, B. (2012-11-15)
      Article
      Accés restringit per política de l'editorial
      The application of a magnetic field to the melt in the transverse direction of the wheel rotation during the solidification process induces magnetic anisotropy in amorphous magnetic ribbons. This procedure is here applied ...
    • Influence of carbon content on microstructure and properties of a steel matrix cermet 

      Alvaredo Olmos, Paula; Bruna Escuer, Pere; Crespo Artiaga, Daniel; Gordo Odériz, Elena (2018-09-01)
      Article
      Accés obert
      There is a marked correlation between the composition, microstructure and properties in TiCN-based cermets. In the case of using iron alloys as metallic matrix the carbon content is of particular significance, as not only ...
    • Influence of magnetic field heat treatment on the microstructures and coercivity in ferromagnetic amorphous alloys 

      Zhao, Chengliang; Bruna Escuer, Pere; Wang, Hao; He, Aina; Wang, Anding; Xie, Chenyang; Xie, Chunxiao; Sun, Zhen-zhong; Chang, Chuntao; Crespo Artiaga, Daniel; Inoue, Akihisha (Elsevier, 2022-11)
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      Accés obert
      To clarify the effect of small magnetic fields on the magnetic properties and microstructure in FeCoSiBPC amorphous alloys, a magnetic field with different directions and various intensities was applied. The results show ...
    • Microstructural characterization and kinetics modelization of vermicular cast irons. 

      Laneri, Karina; Bruna Escuer, Pere; Crespo Artiaga, Daniel (2007)
      Article
      Accés obert
      Several experimental techniques are used for phase identification and microstructure characterization of austempered vermicular cast irons (XRD, SEM, TEM and Mössbauer spectroscopy). Acicular structures were found to be ...
    • Microstructural characterization and modelling in primary crystallization 

      Bruna Escuer, Pere (Universitat Politècnica de Catalunya, 2007-11-15)
      Tesi
      Accés obert
      L'objectiu de la tesi és estudiar la cinètica de les cristal·litzacions primàries en vidres metàl·lics mitjançant simulacions de tipus phase field. Una cristal·lització primària és una transició de fase sòlid-sòlid on la ...
    • New (FeCoCrNi)-(B,Si) high-entropy metallic glasses, study of the crystallization processes by X-ray diffraction and Mössbauer spectroscopy. 

      Panahi, Seyedeh Leila; Garcia-Ramón, María; Pineda Soler, Eloi; Bruna Escuer, Pere (2020-07-16)
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      Accés obert
      The role of B and Si in the formation of (FeCoCrNi) 100-x-y B x Si y high-entropy metallic glasses is studied. It is found that a content of B between 10 and 20 at% and of Si between 5 and 15 at% is able to produce a ...
    • On the validity of Avrami formalism in primary crystallization 

      Bruna Escuer, Pere; Crespo Artiaga, Daniel; González Cinca, Ricardo; Pineda Soler, Eloi (American Institute of Physics, 2006-09-30)
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      Calorimetric data of primary crystallization is usually interpreted in the framework of the Kolmogorov Dokl. Akad. Nauk SSSR 1, 355 1937 , Johnson and Mehl Trans. AIME 135, 416 1939 , and Avrami J. Chem. Phys. 7, ...
    • Phase-field modeling of microstructural evolution in primary crystallization 

      Bruna Escuer, Pere; Pineda Soler, Eloi; Rojas Gregorio, José Ignacio; Crespo Artiaga, Daniel (2014)
      Comunicació de congrés
      Accés obert
    • Phase-field modelling of microstructural evolution in primary crystallization 

      Bruna Escuer, Pere; Pineda Soler, Eloi; Crespo Artiaga, Daniel (2007)
      Article
      Accés obert
      One of the main routes to obtain nanostructured materials is through the primary crystallization of metallic glasses. In such transformations, crystallites with a different composition than the amorphous precursor grow with ...
    • Phonon dispersion relation of metallic glasses 

      Crespo Artiaga, Daniel; Bruna Escuer, Pere; Vallés Sales, Araceli; Pineda Soler, Eloi (American Physical Society, 2016-10-13)
      Article
      Accés obert
      Experimental data on the phase sound speed of metallic glasses show anomalies in the terahertz range, reflecting an underlying complex behavior of their phonon dispersion spectrum not yet explained. We determine the phonon ...
    • Polyamorphic transitions in Ce-based metallic glasses by synchrotron radiation 

      Duarte Correa, María Jazmín; Bruna Escuer, Pere; Pineda Soler, Eloi; Crespo Artiaga, Daniel; Garbarino, Gaston; Verbeni, Roberto; Zhao, Kun; Wang, Wei Hua; Romero Castro, Aldo Humberto; Serrano Gutiérrez, Jorge (2011-12-01)
      Article
      Accés obert
      We report here on a polyamorphic-phase transition upon application of pressure on a Ce-based metallic glass, Ce70Al10Ni10Cu10, investigated by x-ray diffraction and inelastic x-ray scattering. This alloy is found to display ...