Now showing items 1-20 of 50

    • Amorphous physics and materials: Secondary relaxation and dynamic heterogeneity in metallic glasses: A brief review 

      Qiao, Jichao; Wang, Q; Crespo Artiaga, Daniel; Yang, Y; Pelletier, J. M. (2017-01-01)
      Article
      Open Access
      Understanding mechanical relaxation, such as primary (a) and secondary (ß) relaxation, is key to unravel the intertwined relation between the atomic dynamics and non-equilibrium thermodynamics in metallic glasses. At a ...
    • Anti-aging in ultrastable metallic glasses 

      Lüttich, Martin; Giordano, Valentina; LeFloch, Sylvie; Pineda Soler, Eloi; Zontone, Federico; Luo, Yuansu; Samwer, Konrad; Ruta, Beatrice (2018-03-30)
      Article
      Open Access
      As ultrastable metallic glasses (UMGs) are promising candidates to solve the stability issues of conventional metallic glasses, their study is of exceptional interest. By means of x -ray photon correlation spectroscopy, ...
    • Application of mechanically alloyed MnAl particles to de-colorization of azo dyes 

      Abolighasemabadi, Mitra; Mbarek Wael, Ben; Casabella, Oriol; Roca Bisbe, Helena; Pineda Soler, Eloi; Escoda, Lluïsa; Suñol, Joan J. (2018-04-15)
      Article
      Open Access
      The use of metallic particles has been shown to be an effective, low-cost method for degradation of many contaminating compounds. In this work, we analyze the efficiency of MnAl metallic powders for degrading azo dyes, ...
    • Assessment of the glass-forming ability of Mo-based metallic glasses 

      Lluís Garulo, Marta (Universitat Politècnica de Catalunya / Technishe Universität Dresden, 2013)
      Bachelor thesis
      Open Access
      This thesis is focusing on the development of a new Mo-based metallic glass with improved thermal stability. The adopted route to obtain it is mechanical alloying. The amorphization process is analysed through profile ...
    • Characterization of mechanical relaxation in a Cu-Zr-Al metallic glass 

      Liu, Chaoren; Pineda Soler, Eloi; Crespo Artiaga, Daniel (2015-09-15)
      Article
      Open Access
      The temperature dependence of the relaxation times of Cu46Zr46Al8 glass was measured by means of mechanical spectroscopy and static stress-relaxation measurements. The weak intensity of secondary relaxation in this alloy ...
    • Crystallization study on CuZr alloys with fixed stoichiometry and different microstructures (amorphous or nanocrystal line) 

      Brahamcha Marin, Joan (Universitat Politècnica de Catalunya, 2013-07-19)
      Master thesis
      Open Access
      Glasses are solid materials characterized by their lack of long range order, that is, solids with a liquid-like structure. Besides the common silica-based glasses conventionally used in windows, glasses obtained with ...
    • Crystallization, phase evolution and corrosion of Fe-based metallic glasses: An atomic-scale structural and chemical characterization study 

      Duarte, Maria Jazmin; Kostka, Aleksander; Jiménez Rodríguez, José Antonio; Choi, Pyuck-Pa; Klemm, Julia; Crespo Artiaga, Daniel; Raabe, Dierk; Renner, Frank U. (2014-06-01)
      Article
      Restricted access - publisher's policy
      Understanding phase changes, including their formation and evolution, is critical for the performance of functional as well as structural materials. We analyze in detail microstructural and chemical transformations of the ...
    • Dealloying of Cu-Mg-Ca alloys 

      Mbarek Wael, Ben; Pineda Soler, Eloi; Escoda, Lluïsa; Suñol Martinez, Juan Jose; Khitouni, Mohamed (Multidisciplinary Digital Publishing Institute (MDPI), 2018-11-08)
      Article
      Open Access
      The chemical dealloying of Cu-Mg-Ca alloys in free corrosion conditions was investigated for different alloy compositions and different leaching solutions. For some of the precursor alloys, a continuous, pure fcc copper ...
    • Dynamic mechanical relaxation behavior of binary metallic glasses 

      Liu, M. N.; Hao, Q.; Dong, J.; Sun, B. A.; Feng, S. D.; Crespo Artiaga, Daniel; Qiao, J. C. (2021-03-01)
      Article
      Restricted access - publisher's policy
      Secondary ß relaxation is a fundamental issue to understand the diffusion, plasticity and glass transition behavior of metallic glasses. Binary metallic glasses provide a simple glassy system to probe the dynamic mechanical ...
    • Dynamic mechanical relaxation behavior of Zr35Hf17.5Ti5.5Al12.5Co7.5Ni12Cu10 high entropy bulk metallic glass 

      Zhang, L.T.; Duan, Y.J.; Wada, T.; Kato, Hidemi; Pelletier, J. M.; Crespo Artiaga, Daniel; Pineda Soler, Eloi; Qiao, J. C. (2021-08-30)
      Article
      Restricted access - publisher's policy
      Non-equiatomic high entropy bulk metallic glasses were reported recently and show unique mechanical and physical properties. Dynamic mechanical relaxation behavior of Zr35Hf17.5Ti5.5Al12.5Co7.5Ni12Cu10 high entropy bulk ...
    • Dynamic mechanical relaxation in LaCe-based metallic glasses: influence of the chemical composition 

      Liu, Minna; Qiao, Jichao; Hao, Qi; Chen, Yinghong; Yao, Yao; Crespo Artiaga, Daniel; Pelletier, J. M. (Multidisciplinary Digital Publishing Institute (MDPI), 2019-09-17)
      Article
      Open Access
      The mechanical relaxation behavior of the (La0.5Ce0.5)65Al10(CoxCu1-x)25 at% (x = 0, 0.2, 0.4, 0.6, and 0.8) metallic glasses was probed by dynamic mechanical analysis. The intensity of the secondary ß relaxation increases ...
    • Effect of minor addition on dynamic mechanical relaxation in ZrCu-based metallic glasses 

      Cheng, Yu; Hao, Qi; Qiao, Jichao; Crespo Artiaga, Daniel; Pineda Soler, Eloi; Pelletier, J. M. (2021-02-01)
      Article
      Restricted access - publisher's policy
      The dynamic mechanical behavior of Zr50-xCu34Ag8Al8Pdx (x = 0 and 2) bulk metallic glasses was probed by mechanical spectroscopy. The results suggest that microalloying retards the relaxation dynamics. The physical aging ...
    • Element-Resolved Corrosion Analysis of Stainless-Type Glass-Forming Steels 

      Duarte, Maria Jazmin; Klemm, J.; Klemm, S.O.; Mayrhofer, K. J. J.; Stratmann, M.; Borodin, S.; Romero, A.H.; Madinehei, Seyed Milad; Crespo Artiaga, Daniel; Serrano, J.; Gerstl, S. S. A.; Choi, Pyuck-Pa; Raabe, D.; Renner, Frank U. (2013-07-26)
      Article
      Restricted access - publisher's policy
      Ultrathin passive films effectively prevent the chemical attack of stainless steel grades in corrosive environments; their stability depends on the interplay between structure and chemistry of the constituents iron, chromium, ...
    • Emergence of glassy features in halomethane crystals 

      Moratalla Martín, Manuel Eduardo; Gebbia, Jonathan Fernando; Ramos Ruiz, Miguel Angel; Pardo Soto, Luis Carlos; Tamarit Mur, José Luis (American Physical Society (APS), 2019-01-02)
      Article
      Open Access
      Both structural glasses and disordered crystals are known to exhibit anomalous thermal, vibrational, and acoustic properties at low temperatures or low energies, what is still a matter of lively debate. To shed light on ...
    • Estudio de la heterogeneidad topológica en vidrios metálicos 

      Ruíz Camacho, Alejandro (Universitat Politècnica de Catalunya, 2021-02-05)
      Bachelor thesis
      Open Access
      Un vidre metàl·lic és un aliatge metàl·lic amorf, que a escala atòmica té una estructura desordenada com succeeix a un vidre convencional. S’ha demostrat que els vidres metàl·lics (i en general tots els vidres) tenen ...
    • Estudio de las propiedades térmicas de los vidrios metálicos 

      Navarro Piquer, Julio José (Universitat Politècnica de Catalunya, 2012-07-19)
      Bachelor thesis
      Open Access
      Los vidrios metálicos son un tipo de materiales amorfos caracterizados precisamente por la falta de periodicidad en su estructuración atómica. Esta propiedad junto con el carácter metálico de sus enlaces los convierte en ...
    • Estudio de las propiedades viscoelásticas en aceros amorfos 

      Cozar Rabaza, Raul (Universitat Politècnica de Catalunya, 2010-05-27)
      Bachelor thesis
      Open Access
      Los vidrios metálicos son un nuevo tipo de material descubierto en 1960 con aplicaciones potenciales muy interesantes. Su estructura a nivel atómico, similar a la de un líquido, se obtiene mediante un proceso de enfriamiento ...
    • 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 ...
    • Glassy and liquid metals, from microscopic to macroscopic dynamics 

      Pineda Soler, Eloi; Soriano, Daniel (2019)
      Conference lecture
      Open Access