A5021865968- High Entropy Alloys Studies
- Additive Manufacturing Materials and Processes
- Particle physics theoretical and experimental studies
- High-Temperature Coating Behaviors
- Particle Detector Development and Performance
- Welding Techniques and Residual Stresses
- Advanced materials and composites
- Titanium Alloys Microstructure and Properties
- Quantum Chromodynamics and Particle Interactions
- Additive Manufacturing and 3D Printing Technologies
- Metal Alloys Wear and Properties
- Superconducting Materials and Applications
- Metal and Thin Film Mechanics
- Laser-induced spectroscopy and plasma
- Laser Material Processing Techniques
- High-Energy Particle Collisions Research
- Radiation Detection and Scintillator Technologies
- Laser and Thermal Forming Techniques
- Advanced Welding Techniques Analysis
- International Science and Diplomacy
- Logic, programming, and type systems
- Medical Imaging Techniques and Applications
- Bone Tissue Engineering Materials
- Manufacturing Process and Optimization
- Particle Accelerators and Free-Electron Lasers
Universidade da Coruña
2010-2021
Escuela Superior Politécnica del Chimborazo
2020
Universitat Politècnica de València
2013
Ferro (United States)
2006-2007
University of Bern
2003-2005
Lomonosov Moscow State University
2003-2005
Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering
2004
Universidade de Santiago de Compostela
2002-2003
European Organization for Nuclear Research
1995-1996
IBM (United States)
1986
The goal of the DIRAC experiment at CERN (PS212) is to measure $\pi^+\pi^-$ atom lifetime with 10% precision. Such a measurement would yield precision 5% on value $S$-wave $\pi\pi$ scattering lengths combination $|a_0-a_2|$. Based part collected data we present first result lifetime, $\tau=[2.91 ^{+0.49}_{-0.62}]\times 10^{-15}$ s, and discuss major systematic errors. This corresponds $|a_0-a_2|=0.264 ^{+0.033}_{-0.020} m_{\pi}^{-1}$.
Refurbishment of damaged components is nowadays a useful solution to save maintenance costs. Laser cladding one the most advantageous solutions fulfill this kind repair. With aim reusing deteriorated steam circuit parts thermal power stations, laser process has been developed. Different Co-based alloys Stellite® and Tribaloy® families, which offer good resistance against impact, corrosion erosive wear at high temperatures, were used as coating materials improve durability A comparative study...
The development of hardfacing coatings has become technologically significant in many industries A common approach is the production metal matrix composites (MMC) layers. In this work NiCr-WC MMC layers are deposited on C25 steel by means laser cladding. Spheroidal fused tungsten carbides used as reinforcement phase. Three different NiCr alloys with Cr content were tested. Optimum conditions to obtain dense, uniform carbide distribution and hardness close nominal values defined. effect...
The low density, excellent high temperature mechanical properties and good corrosion resistance of titanium its alloys have led to a diversified range successful applications. As consequence, there is demand increasing the capabilities processing such alloys. laser cladding technique allows direct metal deposition with an metallurgical bond pore free fine grained microstructure. A nonlinear transient thermo-metallurgical model was developed study get better understanding thermal underlying...
The DIRAC experiment at CERN has achieved a sizeable production of $\pi^+\pi^-$ atoms and significantly improved the precision on its lifetime determination. From sample 21227 atomic pairs, 4% measurement S-wave $\pi\pi$ scattering length difference $|a_0-a_2| = (.0.2533^{+0.0080}_{-0.0078}|_\mathrm{stat}.{}^{+0.0078}_{-0.0073}|_\mathrm{syst})M_{\pi^+}^{-1}$ been attained, providing an important test Chiral Perturbation Theory.
MCrAlY alloys (where M stands for Ni,Co or both) are commonly used as overlay protective coatings in gas turbine engine components against high temperature oxidation and corrosion. The effect of these is due to the formation a continuous thermally stable oxide layer on coating surface. In this work several types alloys, differing their elemental composition, have been deposited austenitic stainless steel by means laser cladding. microstructure characterized SEM-EDSand XRD. As expected,...
Beta-type titanium alloy surfaces (Ti–35Nb–10Ta (TNT) and Ti–30Nb–4Sn (TNS)) were modified by laser using a power of 1000 W speed 6.7 mm/s (Condition A) 1500 with 10 B). Increasing conditions, the thickness molten layer was also increased. The initial equiaxed grains changes to quite elongated shape. structured under α″ martensite, α matrix β. β phase content decreased slightly increased for both alloys increasing conditions. condition A elastic modulus (E) hardness while B did not affect...
Functional graded materials (FGMs) are a class of composites that have continuous variation material properties. One the aims such is to relieve stress concentrations appear in laminated materials. Coating techniques using powder as filler can be adapted for manufacture composition gradients by means mixing unit feed system which basis laser cladding technology. The aim this paper get coats with layers highest possible ceramic concentration on metal matrix composite (MMC) help FGM methodology.
The failure of titanium implants is associated with two main problems that include the bone resorption and fracture surrounding tissue (stiffness incompatibility) implant loosening (poor osseointegration). development porous low Young modulus solve stress shielding phenomenon, while modification surface must be implemented to promote a fast bond between bone. In this work, femtosecond laser micromachining was applied modify topography Ti samples obtained by space-holder technique obtain...
Coating techniques using powder as added material can be adapted for the manufacture of composition gradients if a mixing unit is included in feed system. As laser cladding technology, FGM obtained parameters are changed along process. This work deals with development NiCrBSi layers WC graded composition. The purpose to obtain longitudinal compositional within distances millimeters scan. To accomplish this task, capabilities and time delays feeding system identified analyzed. Preliminar...
A ring imaging Cherenkov (RICH) detector system has been built and is now in full operation within the DELPHI experiment. Large data samples of Z/sup 0/ decays are being collected with good resolution on observed angles. Several studies using RICH have already performed limited samples. Disturbance caused by shrinkage polymeric construction materials migration radiator substance reported. These effects counteracted do not endanger quality data.< <ETX...