A5070596058- Metallic Glasses and Amorphous Alloys
- Magnetic Properties and Applications
- Magnetic properties of thin films
- Carbon Nanotubes in Composites
- Microstructure and Mechanical Properties of Steels
- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Force Microscopy Techniques and Applications
- Magnetic Properties of Alloys
- Photovoltaic Systems and Sustainability
- Mineralogy and Gemology Studies
- Quasicrystal Structures and Properties
- Phase-change materials and chalcogenides
- Polymer crystallization and properties
- Electromagnetic Effects on Materials
- Fuel Cells and Related Materials
- Semiconductor materials and interfaces
- Mechanical and Optical Resonators
- Advanced battery technologies research
- Hybrid Renewable Energy Systems
- Microstructure and mechanical properties
- Glass properties and applications
- Material Dynamics and Properties
- Magnetic Properties and Synthesis of Ferrites
- solar cell performance optimization
Universidad Politécnica de Cartagena
2006-2011
University of the Basque Country
2003-2005
Material Physics Center
2000-2004
Instituto Nacional de Técnica Aeroespacial
2004
The measurement of small-angle neutron scattering on functionalized single-wall carbon nanotubes in solution is reported. Without the use surfactants, isolated rigid rod behavior has been observed. onset pinning between at different distances depending concentration also detected, as well some aggregation for more concentrated samples. We present evidence a multiscale organization these samples: molecular covalent structure nanotubes, supramolecular bundles, and loose three-dimensional...
Variations of coercive field, induced magnetic anisotropy, and saturation magnetostriction constant in (Co77Si13.5B9.5)90Fe7Nb3 amorphous ribbons submitted to stress and/or axial magnetic-field annealing are reported. The was carried out by using the Joule-heating effect (average temperature values sample corresponding intensity electrical current were 273, 378, 409, 445°C) applied field during thermal treatments 500MPa 750A∕m, respectively. As a result these treatments, uniaxial in-plane...
The effect of different kinds annealing on the magnetic behavior in Fe73.5Cu1Nb3Si15.5B7 amorphous alloy has been investigated. Three current (current densities ranging from 30 to 49 A/mm2 with a duration up 120 s) were carried out: 1. under tensile stress (500 MPa); 2. axial field (750 A/m); 3. MPa) + A/m). As result these thermal treatments, uniaxial in-plane anisotropy can be induced annealed samples. easy axis this at low (<45 A/mm2) was transverse (stress and annealing) or longitudinal...
We have studied, by incoherent neutron scattering experiments, the dynamics of a colloidal suspension functionalized single wall carbon nanotubes (SWNTs). The been with pentyl ester groups attached at ends and suspended in deuterated toluene concentration 2.6 mg SWNT/1 ml toluene. experimental techniques were elastic (IENS) quasielastic (IQNS). In temperature range between 4 K 300 K, three phases observed IENS measurements: solid phase for T<Tg, an undercooled liquid Tg<T<Tm T>Tm....
We have studied blends of poly-(3-octylthiophene) (P3OT) and graphitic nanoparticles by macroscopic transport measurements, Transmission Electron Microscopy (TEM), X-Ray Diffraction (XRD) Scanning Force (SFM) techniques. Their morphology as well their mechanical electrical properties been characterized on a nanometer scale function the carbon nanoparticle concentration in blend. For intermediate concentrations (5–10% wt. nanoparticles) samples present regions pure round polymer mixture,...
The effective magnetic anisotropy of the Fe71.5Al2Cu1Nb3Si13.5B9 alloy with different nanostructures has been investigated. nanostructured phase was produced by means thermal treatment (520–600 °C during 1 h) to develop devitrification precursor amorphous material. evaluated from measurement bias field dependence transverse susceptibility. Values field, Hk, 20 Oe (as-quenched sample) down 7 (optimum nanocrystalline state) were obtained. Such values Hk are close those obtained in classical...
The magnetic anisotropy induced by stress annealing (500 MPa) in Fe73.5Cu1Ta3Si13.5B9 amorphous alloy has been investigated. Such thermal treatment was carried out means of the Joule heating technique (current density ranging from 20 to 40 A/mm2). As a result, uniaxial in-plane samples. dependence this on current shows maximum (1000 J/m3) around 34 A/mm2, which can be connected first stages crystallization process, followed minimum at 37 A/mm2. coercive field increases with kind treatment,...
Abstract High‐temperature‐resistant self‐lubricating coatings are needed in space vehicles for components that operate at high temperatures and/or under vacuum. Thick composite lubricant containing quasicrystalline alloys as the hard phase wear resistance can be deposited by a thermal spray technique. The also contain lubricating materials (silver and BaF 2 CaF2 eutectic) NiCr tough component. This paper describes vacuum tribological properties of TH103, coating this type, with very good...
In this paper, our aim is to explore the potential as soft materials of mechanically alloyed samples FeB system. To that purpose we have followed evolution with milling time their phase distribution and examined magnetic properties final products process. The distributions milled for different times were analyzed using wide angle X-ray scattering (WAXS) thermal stability was investigated from calorimetric results. study hysteretic carried out by a vibrating sample magnetometer working in...