Now showing items 70-89 of 110

    Laser micro-patterning of dental zirconia: effects on microstructure and reliability 

    Roitero, Erica (Date of defense: 2018-02-22)

    Tetragonal polycrystalline zirconia stabilized with 3% mol of yttria (3Y-TZP) is a popular bioceramic, increasingly used for dental applications thanks to its good mechanical properties, biocompatibility and aesthetic ...

    Mechanical and thermal stability of hard nitride coatings 

    Chen, Yu-Hsiang (Date of defense: 2018-06-12)

    Hard coating 's thermal stability is essential due to the high temperature environment of high-speed cutting applications, while the induced phase and microstructure evolution affects the mechanical properties. In this ...

    Mechanical behaviour of tools for shearing Ultra High-Strength Steels: influence of the microstructure on fracture and fatigue micro-mechanisms of tool steels and evaluation of micro-mechanical damage in tools 

    Picas Anfruns, Ingrid (Date of defense: 2012-12-10)

    On account of environmental and safety related requirements, the majority of the most popular automotive manufacturers convey to introduce Ultra High Strength Steels (UHSS) and Press Hardened Steels (PHS) in the vehicle ...

    Mechanical properties of co-doped zirconia ceramics 

    Turón Viñas, Miquel (Date of defense: 2018-01-11)

    Tetragonal polycrystalline zirconia, commonly stabilised with 3 mol% yttria (3Y-TZP), became one of the most interesting ceramics for biomedical applications due to its biocompatibility and high mechanical properties. Among ...

    Métodos alternativos de fixação para componentes de circuitos impressos 

    Marques, André Canal (Date of defense: 2016-02-23)

    The growing demand for innovation and the ever-shorter product lifespan result in a great amount and diversity of waste disposal at dumps and landfills. One of the fastest growing waste types nowadays is e-waste. Consequently, ...

    Micro and nanomecanical behavior of mullite-based environmental barrier coatings 

    Botero Vega, Carlos Alberto (Date of defense: 2012-12-14)

    Mullite coatings deposited by chemical vapor deposition (CVD) have been introduced and proven as excellent candidates to protect silicon carbide (SiC) from severe pitting corrosion and recession, becoming part of the new ...

    Microestructura y propiedades mecánicas de compuestos de polipropileno con hidróxido de magnesio y aluminio moldeados por inyección 

    Morhain, Cédric (Date of defense: 2001-07-03)

    Los hidróxidos de magnesio y de aluminio son unas cargas minerales cuyo uso como carga ignifugante para materiales plásticos, y en particular para polipropileno, es relativamente reciente, aunque en pleno crecimiento debido ...

    Micromechanical characterization of small volumes by means of nanoindentation 

    Cuadrado Lafoz, Núria (Date of defense: 2013-10-02)

    Mechanical characterization of micro-volume systems, as thin films or micro-sized phases embedded in multiphase materials, has attracted special interest in the last decades since different micromechanical techniques have ...

    Millora de la protecció UV de substrats tèxtils mitjançant l'aplicació, en l'extrusió, de nano i micropartícules 

    Cot del Valle, Maria (Date of defense: 2017-11-29)

    In this thesis, we study the improvement of the UV protection of polyester textiles by introducing nano or microparticles of TiO2 in the polyester during the extrusion of the yarn. Initially, the influence of different ...

    Model developments for in silico studies of the lumbar spine biomechanics 

    Noailly, Jérôme (Date of defense: 2009-06-22)

    La present tesi investiga l'ús de la modelització amb elements finits per a l'estudi de la biomecànica lumbar per a l'avaluació clínica. Els estudis bibliogràfics del capítol 1 mostren relacions funcionals clares entre les ...

    Modelling And Analysis Of Crack Turning On Aeronautical Structures 

    Llopart Prieto, Llorenç (Date of defense: 2007-09-21)

    La motivació de la tesis deriva en el interès de la indústria aeronàutica a explotar, per mitjà d'un disseny adaptat, la utilització del gir d'esquerda per protegir els reforços situats davant una esquerda que s'està ...

    Modified poly(lactic acid) sheets manufactured by one-step reactive extrusion-calendering : thermal, rheological, mechanical and fracture behaviours 

    Cailloux, Jonathan (Date of defense: 2016-01-21)

    The purpose of this PhD thesis was to investigate the sensitivity of the rheological, thermal, mechanical and fracture behaviours on the topological changes induced in two commercial PLA grades. PLA 2002D and PLA 4032D ...

    A molecular dynamics study of nanocontact plasticity and dislocation avalanches in FCC and BCC crystals 

    Varillas, Javier (Date of defense: 2019-06-17)

    This study aims to investigate the underlying mechanisms which govern the development of dense defect networks in nanoscale crystal plasticity, either under contact and uniaxial loading conditions, with emphasis on the ...

    Multiscale materials design of hard coatings for improved fracture resistance and thermal stability 

    Yalamanchili, Phani Kumar (Date of defense: 2016-11-09)

    Physical vapor deposited hard coatings comprised of cubic (c) transition metal (TM)-Al-N, and (TM)-Si-N are the current work horse materials for a large number of metal cutting and wear resistant applicatíons to light ...

    New developments in calcium phosphate bone cements: approaching spinal applications 

    Vlad, Maria Daniela (Date of defense: 2009-04-02)

    La presente tesis doctoral (i.e., “New developments in calcium phosphate bone cements: approaching spinal applications”) aporta nuevos conocimientos en el campo de los cementos óseos de fosfato de calcio (CPBCs) en relación ...

    New processing and applications of collagen containing calcium phosphate cements 

    Pérez Antoñanzas, Román (Date of defense: 2011-07-22)

    When bone regeneration is needed, natural bone grafts are widely used. They are the best option since they present the same composition to that of bone, contain living cells with osteogenic potential, growth factors that ...

    Novel functionalized and patterned surfaces for cardiovascular applications 

    Schieber, Romain (Date of defense: 2017-11-10)

    Nowadays, cardiovascular diseases are mainly treated by implantation of a metallic or polymeric mesh, called stent, which maintains the artery widely open. This technique shows very good clinical results, however, it exists ...

    Novel phosphate-based cements for clinical applications 

    Mestres Bea, Gemma (Date of defense: 2012-07-09)

    This Thesis aims at the development of two novel families of inorganic phosphate cements with suitable characteristics for clinical applications in hard tissue regeneration or replacement. It is organized in two distinct ...

    Nuevo tratamiento de oxidación en aleaciones de NiTi para aplicaciones biomédicas. Caracterización superficial y respuesta biológica in vitro 

    Michiardi, Alexandra (Date of defense: 2006-02-24)

    Desde que fueron descubiertas en el principio de los años sesenta, las aleaciones con memoria de forma de NiTi han suscitado un interés creciente. Hoy en día, estos materiales se emplean extensivamente en el campo biomédico. ...

    Obtención de capas de nitruro de titanio mediante tratamiento termoquímico en titanio y Ti6A14V y caracterización de sus propiedades para aplicaciones biomédicas 

    Rodríguez Rius, Daniel (Date of defense: 2000-02-28)

    En la presente tesis doctoral se ha estudiado y caracterizado la obtención de capas de nitruro en titanio y Ti6Al4V mediante tratamiento termoquímico de nitruración para la mejora de la dureza superficial y de la resistencia ...