Materials Literature
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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…
This paper revisits the role of crystallinity in predicting the aqueous solubility of a wide variety of organic compounds. Box and Comer (Current Drug Metabolism, 2008, 9, 869-878) fitted solubility data for 86 drugs to an equation based solely on log P. The General Solubility Equation of Jain and Yalkowsky, which acc…
Capillary torque is induced when a liquid bridge forms between two angle-positioned filaments. This paper aims to study the dependency of such capillary torque upon the filament orientation angle, filament spacing, contact angle, and liquid volume through detailed numerical simulation using a surface finite element sc…
The phase and structural compositions of two 25Cr-30Ni-3Mo austenitic alloys with different concentrations of austenite- and ferrite-stabilizing elements have been analyzed after heat and deformation treatments. It has been found that it is the σ phase that is the dominant intermetallic phase in both alloys. The cryst…
This paper presents the theoretical modeling and prototype demonstration of broadband, low loss, and dual polarization capability of a gradient index metamaterial lens using multilayer microstrip square ring arrays. Microstrip closed square ring elements of variable size are distributed on the planar substrate to sati…
Abstract Several polymer composites formed from nylon 6/CaCO 3 with different ratios and particle sizes were prepared using modified and unmodified CaCO 3 as inorganic filler. The modification of CaCO 3 surfaces was carried out by adsorption of oleic acid from toluene. TGA and DSC measurements show that the glass tran…
Pouco se conhece sobre a diferenciação pedogenética no Alto Paranaíba (MG), quando são comparados materiais de composição química tão variada, como tufitos, rochas ígneas alcalinas e ultramáficas e carbonatitos, todos de ocorrência na região. Dessa forma, este trabalho teve como objetivo caracterizar física, química e…
Few Ti alloys have been designed for ease of sintering. This paper considers the design of alloys for processing using the mixed elemental technique, in which powders are mixed, cold pressed in a die to near net shape and sintered under vacuum at high temperature. The authors describe steps in the process of developin…
We report results on a dimensionally gradient magnetoelectric (ME) sensor that demonstrates high performance over a wide frequency range and a magnetic dc bias operating in the longitudinal-transversal mode. The design of the sensor is based on a piezoelectric bimorph structure and utilizes a laminate configuration wi…
Abstract The aim of this work was to investigate the structures and properties of boron incorporated linseed oil polyols (BPEPs) and their polyurethanes (BPEPUs). Hydroxylation was performed in situ using H 2 O 2 and acetic acid; the syntheses of BPEPs and BPEPUs involves polyesterification and polyaddition reactions…
Ordered Sr 2 FeMoO 6 is expected to have complete spin polarization, however all samples usually present some degree of Fe/Mo disorder which reduces the tunneling magnetoresistance in granular samples. It can be inferred that disorder is detrimental to the half-metallicity. We present an electronic approach of this di…
Poly-α-hydroxy aliphatic esters are novel bio-absorbable polymers (BAPs), which are being used extensively as implantation products (orthopaedics, drug delivery, scaffolds and sutures). Polylactic acid (PLA), polyglycolic acid (PGA) and polydioxanone (PDO) are approved from food and drug administration agency (FDA) fo…
The absorption and desorption of water, as well as the retention of certain molecules within a polymeric network, have special interest in a wide range of applications, including drug delivery, biosensing, chemical separation, catalysis, and optics. In this communication, we report the encapsulation by electrospinning…
Divertor and midplane material evaluation systems (DiMES and MiMES) in the DIII-D tokamak are used to address a variety of plasma–material interaction (PMI) issues relevant to ITER. Among the topics studied are carbon erosion and re-deposition, hydrogenic retention in the gaps between plasma-facing components (PFCs),…
Tungsten–stainless steel (W+SS) composites and functionally graded materials (FGMs) have a potential application as joining material in plasma facing components for nuclear fusion devices. Here, tungsten provides the heat-resistant plasma facing armor, while stainless steel is the main structural material. The composi…
In fusion power reactors, the plasma facing and breeding-blanket components will suffer intense irradiation by 14 MeV neutrons. These high-energy fusion neutrons will produce atomic displacement cascades and nuclear transmutation reactions inside the irradiated materials, and these will result in important radiation d…