Departament de Ciència dels Materials i Enginyeria Metal·lúrgica (fins novembre de 2019): Recent submissions
Now showing items 21-40 of 110
Design and fabrication of functionalized high porous poly(lactic acid)-based scaffolds for tissue engineering
Intelligent scaffolds are designed to trigger the healing regeneration process through the controlled released or disposition of bioactive signals. The fabrication of intelligent scaffolds needs the development of novel ...
Surface modification of zirconia-based bioceramics for orthopedic and dental applications
Debido a sus excelentes propiedades mecánicas y una excelente biocompatibilidad, el uso de las cerámicas de base de circona en aplicaciones dentales y ortopédicas ha crecido rápidamente durante las últimas décadas. Sin ...
Functionalized CoCr surfaces with adhesive molecules to improve endothelialization
Cobalt-chromium (CoCr) alloys are widely used as biomaterials for coronary stents due to their excellent mechanical properties, biocompatibility and corrosion resistance. However, these materials are bioinert, retarding ...
Time dependent flow of biolubricant and suspended particles behavior within total hip replacement
Total hip replacement (THR) has been one of the most successful surgeries in the 21st century. Ultra-high-molecular-weight-polyethylene (UHMWPE) shows favorable mechanical and tribological properties when used as a bearing ...
Functionalization of titanium with integrin-selective ligands for orthopedic and dental applications
Despite being biocompatible and with adequate mechanical properties for application as a bone replacement material, titanium lacks osteoinductive capacity, i.e. it supports new bone growth on its surface but does not foster ...
Characterization of aluminum silicon/short carbon fiber composites fabricated by novel thixomixing method
The metal matrix composites (MMC) are widely used in different applications and offer high strength-to-weight ratio. In this thesis, it was developed a novel method to fabricate composite material in semi-solid state of ...
Damage tolerance of cemented carbides under service-like conditions
Hardmetal industry is continuously seeking for high-performance products at reduced costs. In addition, it is strongly struggled by the high and volatile prices of raw materials. At this juncture, producers and end-users ...
Environment related surface phenomena and their influence on properties of Ti-6Al-4V and Ti-6Al-2Sn-4Zr-2Mo : oxidation at elevated temperature and corrosion during chemical treatment
This thesis covers investigation of the surface phenomena of Ti-6Al-4V and Ti-6Al-2Sn-4Zr-2Mo alloys related with oxidation at elevated temperature and corrosion during chemical treatment in hydrofluoric-nitric acid (HF/HNO3) ...
Deformation mechanisms of metastable stainless steels accessed locally by monotonic and cyclic nanoindentation
Metastable austenitic stainless steels feature an abundance of different deformation mechanisms, which contribute to the distinguished mechanical properties of these alloys. However, these properties are known to depend ...
Métodos alternativos de fixação para componentes de circuitos impressos
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, ...
Propiedades mecánicas y microestructurales del hierro Armco sometido a severa deformación plàstica mediante presión en canal angular de sección constante (ECAP)
Ultrafine grain size Armco iron has been obtained through severe plastic deformation through equal channel angular pressing (ECAP) at room temperature, using a die with interna! angle et> = 90 º, and an angle 4J = 37 º ...
Development of polycarbonate multifunctional foams with graphene nanoplatelets
The goal of this research was to determine the relations between processing, structure and properties of polycarbonate-graphene nanoplatelets (PC-GnP) foams. Using two different foaming processes (in one and two steps) ...
Grinding effects on surface integrity, flexural strength and contact damage resistance of coated hardmetals
This thesis assesses the influence of substrate surface integrity on different mechanical (flexural strength and contact damage resistance under spherical indentation) and tribological (scratch resistance as well as cracking ...
Processing and properties of zirconia-CNT composites
In the last decades there has been growing interest in developing ceramic materials with high fracture toughness (Klc) and strength for structural applications. In the specific case of 3 mol% yttria-doped tetragonal zirconia ...
Wear mechanisms in press hardening of boron steel : identification and laboratory study
Press hardening, also known as hot stamping, is a hot sheet metal forming technique which allows producing lightweight components with complex geometry and outstanding mechanical properties. For this reason, use of press ...
High performance bio-based composites : mechanical and environmental durability
The presented work is a part of the ongoing effort on the development of high performance bio-based composites with enhanced durability, under static and dynamic mechanical loading including the exposure to elevated humidity. ...
Modified poly(lactic acid) sheets manufactured by one-step reactive extrusion-calendering : thermal, rheological, mechanical and fracture behaviours
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 ...
Aerogels based on biodegradable polymers and clay
Foam-like aerogels based on biodegradable polymers and sodium montmorillonite (Na+-MMT) clay were prepared through an environmentally friendly freeze-drying process. Both synthesized and bio-based polymers were utilized ...
Effect of doping ions and organic molecules on the precipitation and biological interactions of nanostructured calcium phosphates
From a chemical and structural point of view, hydroxyapatite (HA) is a strong candidate in biomedical applications owing to its similarity to the inorganic components of bones and teeth. HA nanoparticles (NPs) as colloidal ...
A computational study of intervertebral disc degeneration in relation to changes in regional tissue composition and disc nutrition
Up to 85% of the world population suffers from low back pain, a clinical condition often related to the intervertebral disc (IVD) degeneration (DD). Altered disc cell nutrition affects cell viability and can generate ...
