Materials Literature
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Under open-system hydrothermal conditions, the observed growth habit for mullite composites is columnar. Based on theoretic calculations, performed with the Cambridge serial total energy package, of mullite crystal surface energies for facets (001), (210), (110), and (120), we analyze and discuss the relationship betw…
The deposition of coatings on the surface of carbon fiber will be helpful to their appli-cations. However, they are unsuitable to be deposited due to their low surface free energies, poor wettability and poor adhesions. The objective of this work is to modify carbon fibers by Dielect-ric barrier discharges (DBD) in am…
El articulo presenta el cambio que experimentan dos arcillas en sus propiedades indice de expansion yresistencia a la compresion inconfinada cuando se someten a altas temperaturas 150 225 y 300 C durante tres tiempos de exposicion 1 7 y 15 dias Ademas se estudio si las arcillas recuperan las propiedades mencionadas de…
Cuprous oxide (Cu2O) thin lms were deposited by radio frequency sputtering technique on fused silica substrates. The X-ray diraction study of the Cu2O samples showed reections from ( The samples were then annealed at 1008 K in nitrogen (N2) atmosphere. Annealed samples indicated strain relaxation. The samples were the…
Simultaneous measurements of electron and ion transfers were performed in an all solid ion-transfer device made of transition metal cyanide films, indium–tin oxide (ITO)/Na x Ni[Fe(CN) 6 ] 0.68 ·5.1H 2 O (NNF68)/Na x Co[Fe(CN) 6 ] 0.90 ·2.9H 2 O (NCF90)/ITO, against time ( t ) and temperature ( T ). At 330 K, the curr…
Gloveboxes used for plutonium fuel development and fabrication are eventually dismantled for replacement. Since equipment interior and the inner surface of gloveboxes are contaminated with radioactive materials, glovebox dismantling is performed by workers wearing an air fed suit with mechanical tools in a plastic enc…
The current generation of portable, un-cooled infrared imaging devices utilizes thin-film materials with large thermal coefficients of resistivity. Incoming photons are absorbed by the material, converted into heat, and result in a decrease in the resistivity of the thermal sensing layer. Vanadium oxide thin films are…
The phase transformation and microstructure in solution-treated Ni50Ti45Ta5shape memory alloy have been investigated. Two different second-phase particles, (Ti,Ta)2Ni and a tantalum-rich solid solution (β-Ta) mostly located at grain boundaries are observed. The results indicate that the Ta atoms are suggested to repla…
The image shows an illustration of the modular nanosystem developed for the controlled photorelease of molecular payloads, induced by yellow-green laserlight. Peptide-coated 30-nm gold nanospheres are covalently conjugated to molecular payloads by standard click chemistry, via a 1,2,3-triazole-ring linker. The photore…
this work studies the effect of neutral earth resistance on the controlling ferroresonance oscillation in the power transformer including MOV surge arrester. A simple case of ferroresonance circuit in a three phase transformer is used to show this phenomenon and the three-phase transformer core structures including no…
Sol-gel barium strontium titanate ( Ba0.6Sr0.4TiO3) thin films with different grain sizes have been successfully fabricated as metal-insulator-metal (MIM) capacitors. The perovskite structure of the material has been confirmed via X-ray diffraction (XRD). In order to correlate the effect of the grain size to the condu…
내부식성이 강화된 새로운 방청안료를 개발하기 위한 연구의 일환으로, 본 연구에서는 높은 내부식성을 제공하는 아연 및 세륨 이온 교환된 제올라이트를 도입하였다. 그리고 이온교환 제올라이트를 이용하여 프라이머 도료 제조 및 도장을 수행한 후, 그것의 방식성능을 측정하였다. 도장을 위한 금속 기재는 아연도금(galvanized, GI) 강판이었고, 도장된 강판의 방식성능은 electrochemical impedance spectroscopy(EIS)와 scanning vibrating electrode technique(SVET)으로 측정되었다. EIS 및 절단면의 내부…
Cuprokalininite as an accessory mineral has been found in Cr-V-bearing quartz-diopside metamorphic rock of the Sludyanka Complex, South Baikal region, Russia. This mineral is named as Cu analogue of kalininite (ZnCr2S4), is associated with quartz, Cr-V-bearing tremolite and mica, calcite, diopside-kosmochlor, goldmani…
Aligned nanocomposite electrospun fibers are investigated for electrical (dc, ac, and dielectric) and thermal properties (10−40 wt.%). This nanocomposite consists of poly(methylmethacrylate) (PMMA) grafted core-shell magnetite (CSM) nanoparticles and PMMA. Electrical properties as a function of tunnel gap (in between…
The inverse problem for nonstationary powder combustion in a half-closed volume is considered. A transient was initiated by the abrupt change of the nozzle section. Experiments measured the time dependence of the pressure in a combustion chamber at various ratios of the initial and final nozzle sections. Comparison of…
Immersive copper coatings deposited on steel from sulfate solution with no special additives have practically no adhesion to the base. Special materials must be selected to inhibit associated cathodic and anodic reactions in the contact reduction of Cu 2+ ions on the steel. Immersive deposition of a copper substrate o…
Abstract The composition, morphology and the long-term corrosion resistance in sodium chloride solution of zinc phosphate coating on AZ31B magnesium alloy were investigated using X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, hydrogen evolution and potentiodynamic polarization c…
Microstructure, mechanical properties and electrical conductivity in Cu-0.73%Cr alloy after HPT process and the subsequent aging treatment have been investigated. Ultrafine grained structure with the grain size ~150 nm has been achieved after the HPT and the subsequent aging treatment. Ultrafine grains with some growt…
No município de Formosa da Serra Negra, sul do Maranhão, às margens da rodovia MA006, encontram-se afloramentos de basaltos intemperizados da Formação Mosquito, apresentando textura bastante argilosa e potencial de ser um material bentonítico. Neste trabalho, esse material que vem sendo considerado uma nova ocorrência…
The results of numerical simulation of radiation-thermal forming for bearing shells of reflectors for reactors BN-600 and BN-800, made of various austenitic steels, with the help of parameters of models for radiation swelling, radiation creep, and plasticity, are presented. Based on an analysis of the results, we show…