Exploració per tema "Metalls"

Ara es mostren els items 1-20 de 101

    • 3D FIB/FESEM tomography of grinding-induced damage in WC-Co cemented carbides 

      Roa Rovira, Joan Josep; Llanes Pitarch, Luis Miguel (Elsevier, 2020)
      Article
      Accés obert
      WC-Co cemented carbides (hardmetals) represent the backbone materials for the tooling industry. In order to achieve particular tool geometries, diamond wheel grinding is a well-established method for machining hardmetals. ...

    • 3D-printed porous Ti6Al4V alloys with silver coating combine osteocompatibility and antimicrobial properties 

      Díez Escudero, Anna; Andersson, Brittmarie; Carlsson, Elin; Recker, Benjamin; Link, Helmut; Järhult, Josef D.; Hailer, Nils P. (Elsevier, 2021-12-29)
      Article
      Accés obert
      Additive manufacturing allows for the production of porous metallic implants for use in orthopaedics, providing excellent mechanical stability and osseointegration. However, the increased surface area of such porous implants ...

    • A fuzzy approach for the selection of non-traditional sheet metal cutting processes 

      Cortés Sáenz, David; Gordillo Castillo, Nelly; Riba Romeva, Carles; Lloveras Macià, Joaquín (2015-09)
      Article
      Accés restringit per política de l'editorial
      This work presents a methodology for the selection and comparison of non-traditional sheet metal cutting processes as a new structure of selection by means of an expert system. The model is generated from a knowledge base ...

    • Acoblaments compòsit-compòsit i compòsit-metall 

      Escolano Benach, Roger (Universitat Politècnica de Catalunya, 2022-07-05)
      Treball Final de Grau
      Accés obert
      En aquesta memòria es recull un estudi bibliogràfic dels mètodes emprats en acoblaments compòsitcompòsit i compòsit-metall, excloent-ne els adhesius. S’ha recapitulat els mètodes més habituals en una cartografia visual i ...

    • An in situ investigation of the deformation mechanisms in a ß-quenched Ti-5Al-5V-5Mo-3Cr alloy 

      Barriobero Vila, Pere; Gussone, Joachim; Kelm, Klemens; Haubrich, Jan; Stark, Andreas; Schell, Norbert; Requena, Guillermo (2018-02)
      Article
      Accés obert
      The sequence of activation of deformation mechanisms in a near-ß Ti-5Al-5Mo-5V-3Cr alloy quenched from the ß-field is investigated as a function of strain during uniaxial compression at 0.001¿s-1 up to e = 0.041. Bulk in ...

    • Analysis of printing parameters for metal additive manufactured parts through Direct Ink Writing process 

      Bonada Bo, Jordi; Xuriguera Martin, Elena; Calvo Duarte, Laura; Poudelet, Louison; Cardona, Roger; Padilla, Jose Antonio; Niubó Eslava, Maria (2020-03-09)
      Article
      Accés obert
      Direct Ink Writing is an Additive Manufacturing process in which a metal ink is continuously extruded to built-up a green metal part. Therefore, a debinding and sintering process is required to obtain the final metal part. ...

    • Análisis y ajuste de las variables de proceso para la fabricación de polvos de aleaciones base estaño mediante un atomizador centrífugo 

      Ayllón Muro, Àxel (Universitat Politècnica de Catalunya, 2017-06)
      Treball Final de Grau
      Accés restringit per decisió de l'autor
      En el presente proyecto se ha realizado la puesta a punto de un prototipo para la atomización de polvo metálico mediante la técnica de atomización centrífuga, incluyendo los diferentes componentes que intervienen en el ...

    • 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
      Accés obert
      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, ...

    • Automatización de la dosificación de Material en Polvo para procesos de impresión 3D metálicos 

      Giraldo Agudelo, Juan Felipe (Universitat Politècnica de Catalunya, 2024-01-29)
      Treball Final de Grau
      Accés obert
      Aquest Treball de Fi de Grau (TFG) se centra en la creació d'una solució automatitzada destinada al dosatge precís de material en pols utilitzada en els processos additius de metalls. Per a abordar aquest desafiament, ...

    • Bulk-processed plasmonic plastic nanocomposite materials for optical hydrogen detection 

      Darmadi, Iwan; Östergren, Ida; Langhammer, Christoph; Lerch, Sarah; Lund, Anja; Moth-Poulsen, Kasper; Müller, Christian (2023-07-04)
      Article
      Accés obert
      Sensors are ubiquitous, and their importance is only going to increase across many areas of modern technology. In this respect, hydrogen gas (H2) sensors are no exception since they allow mitigation of the inherent safety ...

    • Caracterització electroquímica d'aliatges "High-Entropy" 

      Grande Bayona, David (Universitat Politècnica de Catalunya, 2020-10-22)
      Treball Final de Grau
      Accés obert
      En aquest treball s’han produït una sèrie de composicions d’uns aliatges anomenats high-entropy metallic glasses. Aquest tipus d’aliatges són una combinació d’aliatges high-entropy, creats a partir de la fusió a alta ...

    • Caracterizacion térmica de hueso y substratos metálicos para uso biomédico 

      Peña Rodríguez, Gabriel; Méndez González, Magdalena; Calderón Arenas, Antonio; Cruz Orea, Alfredo; Sánchez Sinencio, Feliciano (Sociedad Ibérica de Biomecánica y Biomateriales, 2000-12)
      Article
      Accés obert
      En este trabajo reportamos mediciones de difusividad térmica a temperatura ambiente en dos diferentes cortes de hueso denso de res, hueso de res en polvo e hidroxiapatita comercial en polvo. Realizamos una comparación ...

    • Caracterización mecánica y microestructural de superficies de metal duro con implantación iónica 

      García González, Sandra (Universitat Politècnica de Catalunya, 2021-10-18)
      Projecte Final de Màster Oficial
      Accés obert
      El metal duro es un material compuesto por cerámica-metal (cermet). Consiste en carburo de tungsteno (WC) en una matriz de cobalto. Es un material altamente utilizado en la industria por sus propiedades mecánicas: es un ...

    • Caracterización y tratamiento de suelos contaminados por actividades mineras mediante materiales reactivos 

      Navarro Flores, Andrés Francisco (2010)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      En áreas mineras abandonadas, como en la antigua cuenca minera de Anglés (Girona), existen diversas zonas afectadas por la minería del Pb, habiéndose producido la contaminación de los suelos y aguas subterráneas, a causa ...

    • Catalytic transformation of biomass-derived 5-hydroxymethylfurfural over supported bimetallic iridium-based catalysts 

      Chimentäo, Ricardo José; Oliva Muñoz, Héctor; Russo, Verdiana; Llorca Piqué, Jordi; Garcia Fierro, Jose-Luis (American Chemical Society (ACS), 2021-04-28)
      Article
      Accés obert
      5-Hydroxymethylfurfural (HMF) is a biobased platform chemical that can be valorized into a spectrum of valuable products. In this report, supported Ir, Ir–Co, Ir–Ni, and Ir–Ru catalysts were investigated for this purpose. ...

    • Change of the k-factor of printed sensors after multiaxial load 

      Cortés Bañeres, Victor (Universitat Politècnica de Catalunya, 2017-08-31)
      Treball Final de Grau
      Accés obert
      In this thesis, the analysis of the variation of the k-factor after multiaxial loads in a uniaxial tensile test is done. For the performance of this project, the characterization of the DC04 steel is made, analyzing the ...

    • Characterization of bimetallic interface in Cu-Al and Ni-Cu rods cold-welded by ECAP 

      Zhilyaev, Alexander P.; Werner, Thomas; Cabrera Marrero, José M. (2019-11-23)
      Article
      Accés obert
      While cold welding by equal channel angular pressing has already been confirmed to be a viable alternative to join materials that commonly tend to exhibit unwanted brittleness and other heat-induced properties, the exact ...

    • Combinatorial investigation of Al–Cu intermetallics using small-scale mechanical testing 

      Xiao, Yuan; Besharatloo, Hossein; Gan, Bin; Maeder, Xavier; Spolenak, Ralph; Wheeler, J.M. (2020-05-05)
      Article
      Accés obert
      In the past two decades, small-scale mechanical testing has become ubiquitous for mechanical measurements, offering new opportunities to quantitatively probe the mechanical behavior of materials. In this study, we applied ...

    • Contact damage induced by means of conical indentation in hardmetals: Microstructural effects on residual strength 

      Fooladimahani, Saghar; Liu, Chao; Sousa Machado, Pedro Vinicius; Lin, L.L.; Wen, Xin; Jiménez Piqué, Emilio; Llanes Pitarch, Luis Miguel (Elsevier, 2024-01)
      Article
      Accés obert
      Aiming to evaluate the influence of microstructure on residual strength of hardmetals, conical indentation is implemented and validated as a simple and practical methodology to introduce controlled damage. Work is carried ...

    • Contact damage investigation of CVD carbonitride hard coatings deposited on cemented carbides 

      El Azhari, Idriss; García, José; Soldera, Flavio; Suárez, Sebastian; Jiménez Piqué, Emilio; Mücklich, Frank T.; Llanes Pitarch, Luis Miguel (2020-01-01)
      Article
      Accés obert
      The evolution of damage induced as contact load is increased has been investigated on single- and multilayered coated cemented carbides by means of spherical indentation. The main objective of the study was to assess the ...