Now showing items 1-19 of 19

  • 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
    Open Access
    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 ...
  • 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
    Restricted access - publisher's policy
    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
    Restricted access - publisher's policy
    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
    Open Access
    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
    Open Access
    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
    Restricted access - publisher's policy
    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
    Restricted access - publisher's policy
    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 ...
  • Microstructural characterization and kinetics modelization of vermicular cast irons. 

    Laneri, Karina; Bruna Escuer, Pere; Crespo Artiaga, Daniel (2007)
    Article
    Open Access
    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)
    Doctoral thesis
    Open Access
    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 ...
  • 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)
    Article
    Open Access
    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)
    Conference lecture
    Open Access
  • Phase-field modelling of microstructural evolution in primary crystallization 

    Bruna Escuer, Pere; Pineda Soler, Eloi; Crespo Artiaga, Daniel (2007)
    Article
    Open Access
    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
    Open Access
    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 ...
  • Role of Mo in the local configuration and structure stabilization of amorphous steels, a Synchrotron X-ray diffraction and Mossbauer study 

    Pineda Soler, Eloi; Bruna Escuer, Pere; Serrano Gutiérrez, Jorge; Torrens Serra, Joan; Crespo Artiaga, Daniel (2011-07)
    Article
    Restricted access - publisher's policy
    Amorphous steels are promising materials with potential structural applications. The glass-forming ability (GFA) and mechanical properties of metallic glasses are intimately related to the local structure. In Fe-based ...
  • Structural evolution of metallic glasses during annealing through in-situ Synchrotron X-ray diffract 

    Pineda Soler, Eloi; Boneu, Francesc; Bruna Escuer, Pere; Pradell Cara, Trinitat; Labrador, Ana; Crespo Artiaga, Daniel (2008-05)
    Article
    Open Access
    In this work we study the structural evolution of Al and Fe based metallic glass compositions. The samples were obtained as ribbons by melt-spinning, their glass stability and crystallization were analyzed by calorimetry ...
  • Structural study of conventional and bulk metallic glasses during annealing 

    Pineda Soler, Eloi; Hidalgo, I.; Bruna Escuer, Pere; Pradell Cara, Trinitat; Labrador, Ana; Crespo Artiaga, Daniel (2007)
    Article
    Open Access
    Metallic glasses with conventional glass-forming ability (Al-Fe-Nd, Fe-Zr-B, Fe-B-Nb compositions) and bulk metallic glasses (Ca-Mg-Cu compositions) were studied by synchrotron X-ray diffraction during annealing throughout ...
  • Structure and Mössbauer analysis of melt-spun Fe-Pd ribbons containing Ni and Co 

    Rekik, Hanen; Chemingi, Mahmoud; Bachaga, Tarek; Cherif, Amal; Bruna Escuer, Pere; Suñol Martinez, Juan Jose; Khitouni, Mohamed (2015-06-05)
    Article
    Open Access
    Fe68.45Pd28.21Co1.66Ni1.66 alloy in ribbon geometry was produced by melt spinning. The microstructure of the samples was examined using scanning electron microscopy. The structural identification of the as-spun ribbon ...
  • Study of crystallization process of Fe65Nb10B25 and Fe70Nb10B20 glassy metals 

    Torrens i Serra, Joan; Bruna Escuer, Pere; Rodríguez Viejo, Javier; Pradell Cara, Trinitat; Clavaguera Mora, Maria Teresa (2007)
    Article
    Open Access
    The devitrification of the Fe65Nb10B25 and Fe70Nb10B20 metallic glasses produced by melt spinning has been studied by calorimetry (DSC), X-ray diffraction (XRD) and transmission Mössbauer spectroscopy (TMS). Calorimetric ...
  • Thermal and structural study of nanocrystalline Fe(Co)NiZrB alloys prepared by mechanical alloying 

    Gonzalez, A; Escoda, L; Suñol Martinez, Juan Jose; Shao, G.; Arcondo, B.; Bruna Escuer, Pere (2010-01)
    Article
    Restricted access - publisher's policy
    Three nanocrystalline alloys, Fe75-xCox(Ni70 Zr30)15B10 (x = 0, 10, and 20), were synthesized from elemental powders in a planetary high-energy ball mill. Their microstructure, magnetic properties, and thermal stability were ...