Materials Literature
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Ultrafine TiC powders with a grain size of about 25 nm were synthesized from nanoanatase TiO2/carbon black mixtures by mechanical activation-assisted vacuum carbothermal reduction (MCR) reaction. The effects of mechanical activation and carbon sources on TiO2 carbothermal reduction (CR) were also investigated. Results…
The hydrophilic modification of poly (ethylene terephthalate)(PET) fabric is significant for industrial production. Its studied by ultraviolet radiation, nanoTiO2, H2O2 and NaOH. The results show the best condition is 3%nanoTiO2, 5%H2O2 and 3%NaOH, under 1000W UV radiation. With only about 30~35 minutes irradiation th…
We report the integration of one selection diode and one resistive-switching memory element (1D1R) structure based on a GaAs diode on germanium-on-insulator on a Si substrate integrated with Cr/TaOx/Al memory element. The 1D1R device showed unipolar resistive-switching with an ON/OFF resistance ratio of over 102 withi…
This paper proposes a multiphase control strategy for a high dynamic brushless DC linear motor as an alternative for conventional three-phase field-oriented control. Analysis of the magnetic field waveforms shows that three-phase control is not optimal for the 6-slot 7-pole motor topology. Therefore, a multiphase cont…
Background Monoamine oxidase B (MAOB) is a mitochondrial outer membrane protein that degrades monoamines such as dopamine. Thus, MAOB inhibitors are used to treat for instance Parkinson’s disease patients. MAOB inhibitors, however, have neuroprotective properties that are independent on the monoamine-degrading capabil…
The nanosecond lasing performance of core-shell and alloyed CdSe/ZnS colloidal quantum dots is reported. Low amplified spontaneous emission and laser oscillation thresholds of 0.55mJ/cm2and 0.9mJ/cm2are demonstrated for, respectively, thin-films and distributed-feedback cavity structures.
The machining at elevated workpiece temperatures has many technological advantages and was intensively addressed in research within the last 20 years. Hot machining is foremost applied for difficult to cut materials, such as stainless steels. The key reason of the advantages of hot machining of steels is a reduction o…
Este trabalho envolveu a caracterização microestrutural, vibracional e das propriedades dielétricas da hexaferrita de bário obtida pelo método cerâmico. A hexaferrita de bário (BaFe12O19) foi processada por moagem de baixa energia seguida de tratamento térmico. A caracterização estrutural indicou que amostras calcinad…
Fuel cells heat dissipation and cooling is a vital part of PEMFC heat management. This paper used pure water as the coolant to control the temperature distribution inside fuel cells. Established cooling channels geometrical model and simulated the temperature distribution in the steady state by using software SINDA/FL…
Forsterite single crystals doped with chromium and lithium and exposed to ionizing radiation have been studied using multifrequency electron paramagnetic resonance (EPR) spectroscopy. It has been found that ionizing irradiation up to a dose of 10 8 rad does not lead to a significant change in the concentration of sing…
In this paper, an analytical density of states modeling and simulation study was performed for 3m, 3m+1 and 3m+2 armchair-edge graphene nanoribbon under smaller tensile uniaxial strain. It has been discovered that the irregular variation in DOS as a function of energy when the tensile uniaxial strain is increased from…
The physical conditions analysis for the appearance of negative values of the dielectric function (DF) within the T-L splitting frequency interval in polar crystals is presented. The simple quantitative criterion for existence of negative DF band is derived in the three equivalent forms as a proper combination of basi…
This paper takes ball cage patterned constant speed universal joint of as the research object. Using the 3 d modeling software solidworks to establish solid model and simplified it . Based on ANSYS, do finite element contact stress analysis by the universal joint of the two kinds of condition. find out the weak part,t…
In order to determine stress concentration zones and defects on the surface of ferromagnetic components, the empirical model decomposition (EMD) method was proposed to eliminate noise interference of metal magnetic memory signal. Tensile-tensile fatigue test of 16MnR steel with prefabricated defects were carried out,…
P-T-x phase diagrams are constructed for rare earth element (La57-Lu71)-manganese-oxygen and Sc21 (or Y39)-manganese-oxygen systems in the temperature range of 1123–1673 K and at oxygen pressures from atmospheric to 10−20. In addition, diagrams for the ranges cation homogeneity in air are constructed on the basis of e…
Cerium-doped todorokite was synthesized by refluxing process at atmospheric pressure, and the reaction conditions were investigated. The yielded products were characterized by X-ray diffraction (XRD). By according to the results, the stirring operation cannot be stopped during the preparation of birnessite, and the po…
Lead based titanate (PbTiO3) is one of ferroelectric ceramic family that has been widely investigated of its dielectric property towards high capacitance passive device, i.e. capacitor. It has been known that high annealing temperature is needed to perform perfect crystal level of ferroelectric ceramic that is average…
Carbon steel, the most widely used engineering material, despite its relatively limited corrosion resistance used in large tonnages in marine applications, nuclear power transportation, chemical processing , petroleum production and refining, pipelines, mining, construction and metal-processing equipment. The main obj…
Frequency selective surface is interrogated using a subwavelength fiber. Band diagram and S-parameter techniques are used to analyze the transmission spectrum, that shows a large number of Fano resonances at frequencies of Van Hove singularities.
Since the discovery of carbon nanotubes (CNTs), graphene and graphene nanoribbons (GNRs), many efforts have been made to apply these carbon nanomaterials to electronic devices and sensors. Strain sensitivity of CNTs and GNRs is one of their unique electronic properties. However, the effect of complex strain field such…