Materials Literature
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Fatigue properties in high pressure gaseous hydrogen environment were investigated for pipe materials used in fuel cell vehicles and hydrogen stations. Cyclic pressurization tests were conducted using a tubular specimen filled with hydrogen pressurized up to 90MPa. Tested materials were types 316L, 304 and A286 stainl…
We took a model created by the molecular dynamics (MD) simulation with a semiempirical potential as a target system and explored how its amorphous structure and a few other properties depend on the simulation method. We found that if the cooling rate is too high, 1013–1014 K/s, the system has no time to adjust its str…
Low cycle fatigue properties of oxide dispersion strengthened variant of the reduced activation ferritic-martensitic ODS Eurofer steel were determined. Due to a limited volume of the material prepared by powder metallurgy, small cylindrical specimens designed for the IFMIF irradiation campaign were used. The reliabili…
We report on surface-enhanced Raman scattering (SERS) probes based on silver nanoparticles which are deposited on the core of the distal end of standard single mode fibers, by means of the very simple, versatile, and low-cost laser-induced nanoparticle technique. The morphological features of the Ag nanoparticles vary…
Experimental values of the Lorentz tensor components L j for uniaxial quasi-two dimensional “soft matter” objects on substrates (bilayer lipid membranes, multilayer Langmuir films, smectics A, hexatic smectics B, submicron films of discotics Col hd , micron anisotropic films of liquid-crystal comblike polymers and mac…
The silver/silica nanocomposites have been successfully prepared by the sol-gel process. After drying in air at 70°C for 30 min, samples are heat treated in air at 150, 300 and 500°C. Characterizations have been made by ultraviolet-visible (UV-VIS-NIR), X-ray diffraction (XRD), Differential scanning calorimetry (DSC),…
Composite films made from chitosan, plasticizer, and incorporated silica nanoparticles were evaluated for their mechanical properties, thermal stability, water permeability, and surface characteristics. The influence of the chitosan amino group protonation upon the observed silica effects was also analyzed. Only sligh…
Problem statement: Gamma irradiation has been successfully used to prepare a spherical cadmium sulfide CdS/Poly Vinylpyrolidone (PVP) quantum dots nanoparticles with enhancement of their optical band gap energy and thermal properties at room temperature and under ambient pressure. Sodium thiosulfate was used as a sulf…
We describe an experimental procedure for accurate measurement of anchoring energy strength of liquid crystal cells. This technique is based on the possibility of gathering a large amount of very precise data about the linear optical response of the cell in different experimental conditions, using spectroscopic ellips…
A full diffusion kinetic Monte Carlo algorithm is used to model nanocrystalline film deposition, and study the mechanisms of grain nucleation and microstructure formation in such films. The major finding of this work is that new grain nucleation occurs predominantly on surface peaks. Consequently, development of a nan…
We have studied the magnetic and magnetocaloric properties of the Er3Co compound, which undergoes ferromagnetic ordering below the Curie temperature TC = 13 K. It is found by fitting the isothermal magnetization curves that the Landau model is appropriate to describe the Er3Co compound. The giant magnetocaloric effect…
Abstract Fission product accumulation and gas bubble microstructure evolution in nuclear fuels strongly influence their thermo-mechanical properties such as thermal conductivity, gas release, volume swelling and cracking, and hence fuel performance. In this paper, a general phase-field model is developed to predict ga…
A model is presented for magnetoelectric (ME) effects in the region of electromechanical resonance (EMR) for ferrite-piezoelectric nanobilayers, nanopillars, and nanowires on a substrate or a template. Influence of the lattice mismatch on the material parameters and ME interactions has been taken into account using th…
Ga-doped zinc oxide (GZO) films were deposited using rf magnetron sputter deposition and a Ga 2 O 3 (5 wt %)-doped ZnO ceramic target under various deposition conditions. The effects of each deposition condition on the electrical, structural, and optical properties of the GZO films were investigated to obtain a transp…
The magnetocaloric effect and the heat capacity of La1 − x K x MnO3 (x = 0.1, 0.15, 0.175) ceramic samples have been studied at temperatures in the range 77–350 K and in magnetic fields of up to 27 kOe. The technique for preparing the samples has been described. The heat capacity anomalies related to the ferromagnetic…
Aerosol is a new dosage form for wound dressing and wound healing. Concentrate of aerosols which were prepared for wound dressing and wound healing will produced films after sprayed onto the surface of wounds. The aim of this study is to evaluate the mechanical and water vapour permeability properties of the films fro…
Total strain controlled tests have been performed on cylindrical specimens of austempered ductile cast iron (ADI) and ductile cast iron with the ferritic matrix, both alloyed with 2.75% Ni, with the aim to compare cyclic plasticity and the fatigue life at temperatures 23 °C and–45 °C.In ADI the measurement of retained…
Este trabalho teve como objetivo determinar as propriedades de chapas fabricadas com partículas de madeira de paricá (Schyzolobium amazonicum Huber ex. Ducke), às quais foram adicionadas diferentes proporções de fibras de coco (Cocos nucifera L.). As chapas foram fabricadas com 6 ou 8% de adesivo, à base de ureia-form…
The structural gene ldhL for a thermostable L-(+)-lactate dehydrogenase was cloned from Thermoanaerobacter ethanolicus JW200. The nucleotide sequence of the ldhL gene was determined and shown to have the capacity to encode a protein of 311 amino acids (33.5 kDa). By 5'-RACE analysis, the ldhL transcription start point…
Long-wavelength fluorescent dyes with improved efficiency and stability are required to realize new photoelectronic and biophotonic applications. We have designed and synthesized novel 2,6- or 3,5-substituted BODIPY (BDP) dyes by a simple protocol to reach wavelength-finely tunable laser action from 600 to 725 nm. The…