A5030334016- Metallic Glasses and Amorphous Alloys
- Shape Memory Alloy Transformations
- Polymer crystallization and properties
- Magnetic Properties of Alloys
- High Entropy Alloys Studies
- Magnetic and transport properties of perovskites and related materials
- Thermal and Kinetic Analysis
- Heusler alloys: electronic and magnetic properties
- Phase-change materials and chalcogenides
- Polymer Nanocomposites and Properties
- Microstructure and mechanical properties
- Creativity in Education and Neuroscience
- Intermetallics and Advanced Alloy Properties
- Material Dynamics and Properties
- Crystallization and Solubility Studies
- Microstructure and Mechanical Properties of Steels
- Advanced materials and composites
- Textile materials and evaluations
- Advanced Cellulose Research Studies
- Natural Fiber Reinforced Composites
- Aluminum Alloys Composites Properties
- Glass properties and applications
- Metallurgical and Alloy Processes
- Polymer Science and PVC
- Injection Molding Process and Properties
University of Girona
2016-2025
Universitat Autònoma de Barcelona
1991
The aging of high-density polyethylene (HDPE) when exposed to drastic climatic conditions (Canadian winter, characterized by low temperature and abrupt variations between the night day) was studied. importance degradation determined evaluating microstructural changes in HDPE (i.e., oxidations, ramifications, polymeric chain breaking) means FTIR spectrophotometry. crystallinity variation DSC also Both techniques led coherent results: there a loss due weathering degradation. This reduction...
The Fe 65 Co 35 alloy is a well‐known Fe‐based soft ferromagnetic with excellent magnetic properties, which make it strong candidate to be used in technological applications. In the present work, synthesizing nanoscrystalline by mechanical alloying focused on, adding cyclohexane (C 6 H 12 ) acting as process control agent (PCA). PCAs are effective favoring nanostructured alloys uniform grain size. production of this type promising approach tune hardness . Structural, thermal, morphological,...
Abstract The effect of Co-doping on the structure, microstructure, martensitic phase transformation kinetics, and magnetic properties melt-spun (Ni 50 Mn 40 In 10 ) 1−x Co x (x = 1, 2, 3) Heusler ribbons, named hereafter Co1 ( 1), Co2 2), Co3 3), was assessed using X-ray diffraction, scanning electron microscope, energy-dispersive spectroscopy, fluorescence, differential calorimetry, vibrating sample magnetometer. XRD results reveal formation a 14M martensite structure alongside...
The martensitic transformation and the solidification structures of Mn49.3Ni43.7Sn7.0 alloy ribbons prepared by melt-spinning were investigated means scanning electron microscopy, X-ray diffraction differential calorimetry. In those experiments special attention was given to melt spinning processing parameters such as linear surface speed copper wheel rotating, injection overpressure distance between quartz tube. Transformation entropy found higher when increasing or from point wheel....
The ageing of HDPE/cellulosic fiber composite exposed to drastic weather and the percentages cellulosic fibers are responsible for some changes in crystallinity component matrix (HDPE). Two types samples have been evaluated during different periods time (up 90 days). One which not treated another given a treatment with coupling agent, silane type, favours adhesion matrix. instrumental analysis techniques used determine HDPE: Fourier Transform Infrared spectrophotometry (FTIR) Differential...
A FeCoNi(B0.5Si0.5) high-entropy alloy with the face-centered cubic (FCC) crystal structure was synthesized by mechanical alloying and spark plasma sintering (SPS). Phase evolution, microstructure, morphology annealing behaviors were investigated. It found that a single FCC solid solution appears after 50 h of milling. The grain size 10 nm 150 Microstructure parameters calculated Rietveld fitting X-ray Diffraction patterns. Magnetic characterizations milled annealed powders at 650 °C for 1...
Abstract The degradation of polypropylene–polyethylene copolymers (which were used to make the seats for Olympic stadium in Barcelona, Spain), response natural aging 2.5 years and artificial 5000 h a xenon lamp chamber, was studied. extent various photoreactions, including formation carbonyl groups, scission hydrocarbonated chains, free radicals tertiary carbons, nonsaturated bonds followed by branching crosslinking, analyzed Fourier transform infrared spectrophotometry. Melting thermal...
Thermal and structural austenite to martensite reversible transition was studied in melt spun ribbons of Ni50Mn40Sn5Co5, Ni50Mn37.5Sn7.5Co5 Ni50Mn35Sn10Co5 (at. %) alloys. Analysis X-ray diffraction patterns confirms that all alloys have martensitic structure at room temperature: four layered orthorhombic 4O for seven-layered monoclinic 14M Ni50Mn35Sn5Co5. differential scanning calorimetry scans shows higher enthalpy entropy changes are obtained alloy Ni50Mn37.5Sn7.5Co5, whereas temperatures...
Two nanocrystalline ferromagnetic alloys of the Fe-Co-Nb-B system have been produced by mechanical alloying (MA). Their microstructure, thermal behavior and magnetic response were checked X-ray diffraction (XRD), differential scanning calorimetry (DSC) vibrating sample magnetometry (VSM). After 80 h MA, nanostructured (bcc-Fe(Co)-rich phase). As Co content increases, density dislocations decreases. Besides, a higher concentration causes an increase in activation energy crystallization...
The structural, magnetocaloric, and magnetic characteristics in Heusler Ni50Mn35In10X5 (X = Ga, Fe, Al) alloys were examined using X-ray diffraction field-dependent magnetization measurements. All samples exhibited a mixture structure of cubic L21 tetragonal L10 underwent second-order transitions at TC(Al5) 220 K, TC(Ga5) 252 TC(Fe5) 298 K. Ga5 alloy structural change as indicated by thermal hysteresis that may be seen the saturation field M(T) dependences. transition TC point from...