Materials Literature
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A major challenge for future fast reactors could be the recycling of minor actinides (MAs) in the core fuel in order to minimize waste and to meet both the sustainability objective and the reduction in the burden of geological disposal. Although the prevailing issues will be found in the development and validation of…
The high power light emitting diodes (LEDs) based on InGaN and AlGaInP individually are tested on line at temperatures from −30 to 100 °C. The data are fitted to measure the relationship between temperature and the properties of forward voltage, relative light intensity, wavelength, and spectral bandwidth of two diffe…
We show that processes used to fabricate advanced porous dielectrics can exhibit reliability approaching the intrinsic capability of the material. Combining this with simulations of failure distributions as a function of porosity and line edge roughness we demonstrate that failure times due to electrical breakdown rap…
The room temperature positron annihilation lifetime for single crystalline ZnO has been measured as 164 ± 1 ps. The single component lifetime value is very close to but higher than the theoretically predicted value of ~154 ps. Photoluminescence study (at 10 K) indicates the presence of hydrogen and other defects, main…
The capabilities of the iodide transport method for the deposition of coatings on powders have been investigated. It has been demonstrated that this process is affected by different factors, such as the temperature, time, structure of the substrate material, and its dispersity.
The possibilities of the extraction and collimation of a circulating beam by a new method due to the reflection of particles in crystals with axial orientation were experimentally investigated in the Fall 2010 run at the U-70 synchrotron. Such crystals have positive features, because the axial potential is five times…
The ageing of insulation denotes physical and chemical changes, which takes place as a result of electrical stresses in the power system network. In the modern days, a large use of nonlinear devices has resulted into increased distortion in load voltages. The current drawn by all such devices contains harmonics. The l…
Different methods to improve the cold start of a stack were studied under the different conditions using experiments and simulations. The heat storage period of the stack was analyzed contrastively with /without heat storage. The stack not sealed by heat storage material needs merely 3 hours and 7 hours to drop to 0°C…
Zinc and cadmium bis- o -semuquinolate and catecholate complexes are synthesized by the reduction of 3,6-di- tert -butyl- o -benzoquinone (3,6-Q) with amalgamated metals in a medium of various solvents. The oxidation of the metal catecholate derivatives results in the corresponding mono- o -semiquinone complexes, whic…
PURPOSE: The objective of this study was to evaluate the effect of thermocycling (TC), self-adhesive resin cements and surface conditioning on the microtensile bond strength (μTBS) between feldspathic ceramic blocks and resin cements. MATERIALS AND METHODS: Fifty-six feldspathic ceramic blocks (10 x 7 x 5 mm) (Vita Ma…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Nian Ji, Yiming Wu, Jian-Ping Wang; Epitaxial high saturation magnetization FeN thin films on Fe(…
Calpastatin (CAST) gene is located on the fifth chromosome of sheep and plays important roles in formation of muscles and meat tenderness after slaughtering. Association of genetic polymorphism in the CAST gene locus MspI and NcoI with body weight was examined in local sheep from Jonggol Animal Science Teaching and Re…
This paper reports that the maximum electric field is a dominant factor for reliability in high-voltage GaN-HEMTs. Four types of the GaN-HEMT with different field plate (FP) structures were tested in continuous switching operation mode to analyze the degradation mechanism and the optimal device design. From the on-res…
The design of an aerospace structure using an off-the-shelf composite would involve increasing the gauge thickness until all the design requirements are met. This can lead to an inefficient design, because excess margins will exist for all properties except the one that determines the gauge. The design of a material c…
Molecular dynamics simulations have been conducted of the helical polypeptide melittin, in concentrated aqueous solutions of the alpha and beta anomers of D-glucopyranose. Glucose is an osmolyte, and it is expected to be preferentially excluded from the surfaces of proteins. This was indeed found to be the case in the…
Direct extrusion forming process, two-stage extrusion forming process and composite extrusion forming process were designed for manufacturing a titanium alloy tapered piece. Comparison of the forming loads under the different processes were investigated using Deform finite element method(FEM).Considering the load size…
The effect of postweld heat treatment (PWHT) on microstructure and properties of the heat affected zone (HAZ) in ASTM4130 steel fabricated by single-pass welding was investigated by weld thermal simulation test, optical microscope, transmission electron microscopy and scanning electron microscope. The results show tha…
The aim of this paper is to propose a systemic methodology to predict effective properties of plain weave C/SiC composites based on finite element computational micromechanics (FECM) method. Utilizing photomicrographs taken by scanning electron microscope (SEM), we established an accurate macro representative volume e…
The influence of additions of boric acid on the aging of as-prepared gels from water-alcohol solutions of tetraethoxysilane has been investigated by the kinetic spectrophotometric method using the reaction between silica and ammonium molybdate with the formation of a colored β-silicomolybdate heteropolyanion as the re…
Geckos have extraordinary climbing ability. The multi-scale hierarchical structure of the gecko foot-hairs, especially the high-aspect-ratio structure of its micro-scale seta and nano-scale spatulae is the critical factor of the gecko’s ability to adopt and stick to any different surface with powerful adhesion force.…