Materials Literature
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There has been increasing application of on-line partial discharge (PD) based cable insulation condition monitoring among utilities worldwide due to the ability of on-line PD monitoring to allow incipient insulation faults to be detected and aged cable replacement program to be prioritised. However the application is…
Blister thresholds in fuel elements have been a longstanding performance parameter for fuel elements of all types. This behavior has yet to be fully defined for the RERTR U-Mo fuel types. Blister anneal studies that began in 2007 have been expanded to include plates from more recent RERTR experiments. Preliminary data…
The (Ba0.88Ca0.12)( Zr0.12Ti0.88)O3 powders and piezoelectric ceramics were prepared by sol-gel process. The reaction process was analyzed with the help of thermo gravimetric and differential scanning calorimetry. X-ray diffraction characterized results showed that the structure of the (Ba0.88Ca0.12)( Zr0.12Ti0.88)O3…
The effects of trapping of ion-implanted deuterium and its thermal desorption on the structure and stressed state of a tungsten coating deposited on a composite substrate is studied. The amount of accumulated deuterium, macrostresses of the coating, and the shape of thermal desorption spectra are shown to depend on th…
Abstract Graft copolymers with a polyester backbone and PMMA side chains were successfully prepared in a two and a three step approach. In the two step approach, functional polyesters were prepared via polycondensation using hexane diol and bromosuccinic acid as building blocks and methyl methacrylate (MMA) was grafte…
- Ferromagnetic stainless steels (SS) produced by powder metallurgy (PM) techniques have been investigated as potential candidates for dental prosthesis applications in replacement of magnetic attachments made of noble and expensive alloys. Two SS were investigated: SS 17-4 PH produced by powder injection (PIM) and SS…
Magnesium reduction Jar can be critical, consumable parts in magnesium reduction process, this paper Introduced the working environment and the common failure modes of magnesium reduction can, based on the failure can cause magnesium reduction, presents a The new structure, developed a new material, and magnesium can…
The kinetics of the thermal polymerization of perfluoromethylvinyl ether (PFMVE) is studied at pressures of 3–13 kbar (300–1300 MPa) and temperatures of 80–260°C. The activation energy (E act = (76 ± 3) kJ/mol) and activation volume (ΔV 0 ⪼ = −(27 ± 2) cm3/mol) for the overall polymerization rate are determined. The i…
The friction behaviors of CVD diamond films on silicon nitride substrates are investigated comparing with the uncoated silicon nitride samples. Two types of CVD diamond films, namely MCD and NCD films, are deposited on the silicon nitride substrates using HFCVD method, and then SEM, while light interferometer, XRD and…
Using a U (2) algebraic model the fundamental stretching vibrations of copper octaethyl porphyrin and magnesium octaethyl porphyrin are calculated for 24 vibrational bands. The locality parameter ξ confirms the highly local behavior of the stretching modes of these porphyrin molecules. The model Hamiltonian so constru…
We have increased the figure-of-merit (FOM) of a (Ba,Sr)TiO₃ (BST) film microwave tunable device by approximately three times for MgO(111) compared with a MgO(100) substrate at a frequency range of 20 GHz. Differences in permittivity and tunability in a BST film may be closely related to the difference in the film str…
The dependence of the properties of supported cobalt catalysts for hydrocarbon synthesis from CO and H 2 on the porous structure of the supports (aluminas and aluminosilicates) is reported. A correlation between the mean Co 0 crystallite size and the pore diameter of the support is established. The specific CO convers…
The novel phenomenon of chiral tunneling in metallic single-wall carbon nanotubes is considered. It is induced by the interplay of electrostatic and pseudomagnetic effects in electron scattering in chiral nanotubes and is characterized by an oscillatory dependence of the electron transmission probability on the nanotu…
Multilayer thin films consisting of nanometer-thin, Er-doped luminescent layers (either SiO2:Er or Si3N4:Er) interlaced with nanometer-thin, Si-rich sensitizing layers (either Si-rich oxide or Si-rich nitride) are proposed as a solution to loss of Er3+ optical activity during nanocluster Si (nc-Si) sensitization of Er…
Impregnation techniques for corundum (S BET = 0.5 m2/g) as a support for Ni catalysts for C3–C4 alkane pyrolysis into catalytic filamentous carbon (CFC) are compared. The effects of the following factors on the uniformity of the active component (Ni) deposition on the inert support and on the CFC yield (g CFC)/(g Ni)…
Solar grade silicon (SoG-Si) is the key material for photovoltaic applications. In this study, the silicon grain size, concentration of HF, leaching time and leaching temperature were investigated by orthogonal methods. The results showed that the silicon grain size is the most important factor for the purification of…
BaTiO3 powders are prepared by sol-gel method by cotton template. Polypyrrole is prepared by chemical oxidation route in the emulsion polymerization system. Then BaTiO3-polypyrrole composites with different mixture ratios are prepared by as-prepared material. The structure, morphology, and properties of the composites…
Curing systems play a vital role in designing rubber compounds for various industrial applications. Keeping this in view, a comparative study of the effects of four different curing systems such as sulfur, dicumyl peroxide (DCP), metal oxide (PbO) and epoxy resin on the curing characteristics, physico-mechanical, and…
Incipient faults in transformer can degrade both oil and cellulose insulation, leading to the formation of dissolved gases. The authors investigate the relationship between incipient surface discharge and key gases. First, this paper presents the experimental platform and test method. Second, by means of statistical h…
Bagasse is an abundant agricultural byproduct. The use of bagasse has generated much interest due to its low cost, possibility of environmental protection and use of locally available renewable resources. In this paper, cellulose was dissolved in the ionic liquid （1-butyl-3-methylimidazolium chloride） and regenerated…