نتایج جستجو برای: sic nano whiskers
تعداد نتایج: 64767 فیلتر نتایج به سال:
SiC powder preparation using Sol-Gel method. The size of nano-particles grows as the temperature exceeds 900° C. Size of probable agglomerations produced, is approximately less than 50nm. The surface is suitable to be used for dye solar cells. SiC emission occurs at wavelength area of 11.3μm or wave number area of 884.95 cm-1. In this paper probing the nature of annealed SiC samples in mixture,...
The main objective of the present paper is to report on the concentration of silicon carbide (SiC) fibres, crystalline silica and respirable dust in a Canadian SiC production plant and to compare the results with earlier investigations. The second objective is to tentatively explain the differences in concentration of the fibrogenic substances between different countries. The assessment of SiC ...
Excellent performance of refractories in blast furnace hearth is one the important factors to ensure longevity furnaces. As an emerging refractory for application furnace, alumina-carbon composite brick combines superior properties carbon and alumina. Firstly, thermal conductivity was measured by laser flash method new device verify feasibility measurement. Secondly, influence heating temperatu...
Radiation-induced amorphization is one of the concerns with SiC as structural components for next-generation nuclear reactors. Numerous studies have been focused on the amorphization mechanisms under electron, neutron, and ion irradiation. Proposed mechanisms for ion-induced amorphization include nucleation and growth of amorphous regions, direct impact combined with stimulated amorphization at...
Evidence of the release of certain metallic fission products through intact tristructural isotropic (TRISO) particles has been seen for decades around the world, as well as in the recent AGR-1 experiment at the Idaho National Laboratory (INL). However, understanding the basic mechanism of transport is still lacking. This understanding is important because the TRISO coating is part of the high t...
Doping of MgB2 by nano-SiC and its potential for the improvement of flux pinning were studied for MgB22x(SiC)x/2 with x50, 0.2, and 0.3 and for 10 wt % nano-SiC-doped MgB2 samples. Cosubstitution of B by Si and C counterbalanced the effects of single-element doping, decreasing Tc by only 1.5 K, introducing intragrain pinning centers effective at high fields and temperatures, and significantly e...
Mono dispersed nano SiC particles with spherical morphology were synthesized in this project by hydrolysis and condensation mechanism during sol gel processing. pH, temperature and precursor’s ratio considered as the main parameters which could influence particles size. According to DLS test results, the smallest size of particles in the sol (<5nm) was obtained at pH<4. It can be observed from ...
Cellulose insulation paper is the main component of oil-paper systems in oil-immersed transformers. However, poor thermal conductivity and stability cellulose can lead to ageing. It critical address this issue by improving performance cellulose, nano-SiC-modified models were established molecular simulation, while nano-SiC composite papersheets prepared based on simulation results, effects diff...
SiC is a candidate material for microand nano-electromechanical systems (MEMS and NEMS). In order to understand the impact that the growth rate has on the residual stress of CVDgrown 3C-SiC hetero-epitaxial films on Si substrates, growth experiments were performed and the resulting stress was evaluated. The film thickness was held constant at ~2.5 μm independent of the growth rate so as to allo...
Composite and nanocomposite Ni-Co/SiC coatings were synthesized by electro-codeposition of micro and nano-sized SiC particles with average diameter of 10m and 20nm using horizontal electrodes. Surface morphology, chemical composition, phase composition, hardness and corrosion resistance of the deposited coatings were studied using SEM observations and EDX, XRD, microhardness and polarization ...
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