Materials Literature
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Tore Supra has—like ITER—reflecting internal surfaces, which can perturb the machine protection systems based on infrared (IR) thermography. To ameliorate this situation, we have measured and modelled in the 3–5 μm wavelength range the bi-directional reflection distribution function (BRDF) of wall material samples fro…
Optical second-harmonic (SH) generation in Au/Co/Au sandwich-like nanodisks is studied, using several experimental techniques, at SH frequency being close to that of the plasmon resonance in the system. The dependences of the relative amplitude and phase of the magnetization-induced SH component on the angle of incide…
Modelling of the current density in elelectroconductive textiles is a complicated problem as they cannot be considered homogenous structures with an isotropic current distribution. This anisotropy is mainly the result of the electrical contact resistance between interlacing yarns comprising the textile. It is difficul…
The TiO2 films prepared from a sol–gel precursor were deposited on glass substrates using spin coating technique. Titania sols were doped with and without a pore generating agent, polyethylene glycol (PEG), to evaluate the effect of porosity on the superhydrophilicity of the coatings. The crystalline phase and surface…
Field emission performance of boron nitride (BN) island films is studied in terms of cubic phase evolution in plasma-enhanced chemical vapor deposition. Fine-grained island films with large surface roughness can be grown for initial sp2-bonded BN and subsequent cubic BN (cBN) phases by using low-energy (∼20 eV) ion bo…
Various geometric sizes and helical types (i.e., armchair, zigzag, and chiral) of single-walled carbon nanotubes (CNTs) are considered in molecular dynamics simulations in order to systematically examine the length-to-radius ratio and chirality effects on the buckling mechanism. The buckling strain is getting smaller…
O fenômeno de dispersão da argila do solo pode ser provocado pela qualidade da água de irrigação. Objetivou-se estudar o efeito da irrigação com água com diferentes condutividades elétricas (CE), combinadas com diferentes valores de Relação de Adsorção de Sódio (RAS), na dispersão da argila de solos, de diferentes min…
The temperature response of the thermal conductivity (lambda) of metal thin films has been investigated by the thermoreflectance (TR) method. The phase lag of the TR signals depends on the thermal diffusivity when the heating area is small, while on the thermal effusivity when the heating area is large. This enables u…
The effect of substrate temperature on the crystallographic texture and surface morphology of Ba0.5Sr0.5TiO3 deposited by rf magnetron sputtering on (111) oriented Pt (150 nm)/Ti (10 nm)/SiO2 (300 nm)/Si (100) substrates is reported. The onset of crystallinity is observed above 500 °C, beyond which all films are orien…
Polyfunctional linear poly[(sodiumoxy)methylsilsesquioxanes] are obtained via the hydrolytic polycondensation of sodiumoxymethyl(dialkoxy)silanes. Blocking of sodiumoxy groups with vinyl(dimethyl)chlorosilane is employed to obtain vinyl(dimethyl)siloxane replicas of polyfunctional matrices. The linear structure of the…
The experimental determination of thermal and optical properties, such as the fluorescence quantum efficiency (η) and temperature coefficient of the optical path length change (ds/dT) have been a challenging task. In this work, mode-mismatched thermal lens and spectroscopic measurements were performed using Er3+-, Nd3…
Abstract—The characterizations of coconut milk fouling deposits formed during pasteurization process at temperature from 70 to 80ºC were investigated. Both in-situ (using lab-scale plate heat exchanger) and ex-situ methods (using shakable water bath) were applied in preparing the fouling sample and for cleaning study.…
Article Variational Principle for Nonlinear Magneto-Electro-Elastodynamics with Finite Displacement by He's Semi-Inverse Method was published on December 1, 2009 in the journal International Journal of Nonlinear Sciences and Numerical Simulation (volume 10, issue 11-12).
Relative dielectric constant and dissipation factor (tan¿) values as a function of frequency have been measured for a variety of water types. The effect of water absorption on the permittivity properties of crystalline powders or nanopowders when exposed to various humidity levels is also examined. Powdered materials…
Abstract In this extended study, the effect of silica reinforcement on natural rubber (NR) and NR/styrene–butadiene rubber (SBR) compounds was studied. The silica surfaces were treated with bis(3‐triethoxysilylpropyl)‐tetrasulfide, which is a silane‐coupling agent, to chemically bond the silica to the rubber. Optimum…
We have studied the chemical erosion of different carbon composites in Pilot-PSI at ITER-relevant hydrogen plasma fluxes (∼10 24 m -2 s -1 ) and low electron temperatures ( T e ∼1 eV). Optical emission spectroscopy on the CH A – X band was used to characterize the chemical sputtering. Fine grain graphite (R 6650, SGL…
The aim of the present work is to compare two methods of synthesis of nanocrystallline zinc oxide doped with iron oxide. The synthesis was carried out using microwave asssisted hydrothermal synthesis and traditional wet chemistry method followed by calcination. The phase composition of the samples was determined using…
La 5 Cu 4 As 4 O 4 Cl 2 was prepared from a cold-pressed pellet of lanthanum filings, ground arsenic, Cu 2 O and LaOCl in the ideal 3 : 4 : 2 : 2 ratio. The pellet was annealed in an evacuated silica tube at 1473 K for two days and then cooled down to room temperature. LaOCl was always observed as a by-product. La 5 C…
Investigamos la estructura y la diversidad de las comunidades de diatomeas en el metafiton y el perifiton del humedal de la Reserva Ecológica El Edén, Quintana Roo, México. A pesar de la cercana asociación entre estas comunidades, nuestro análisis revela que tanto el perifiton como el metafiton consisten de distintas…
The Landau theory has been developed for the description of martensite aging. The characteristic features of the theory are: i) the multicomponent non-scalar character of the order parameter describing the slow reconfiguration of lattice defects after martensitic transformation (MT); ii) the complete agreement with Sy…