Materials Literature
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Highly toughened nickel dispersed alumina-based nanocomposites were fabricated using our developed soaking method, based on our previously proposed toughening mechanism of nanocomposites. Commercially available γ-alumina agglomerate with high porosity was used as a starting material. Nickel nitrate solution was penetr…
This paper describes a convenient and efficient synthesis of new pentafluoro-λ6-sulfanyl-containing 1,3-, 1,4- and 1,5-alkadienes and their epoxidation. These compounds are useful as monomers or as intermediates in the preparation of polymers, polymer surface coating and SF5-containing heterocyclic compounds.
β-type titanium alloys consisting of non-toxic elements, Ti-8Fe-8Ta, Ti-8Fe-8Ta-4Zr, and Ti-10Fe-10Ta-4Zr, were newly designed and developed for biomedical applications. Changes in the mechanical properties of the designed alloys with various heat treatments were discussed on the basis of the resultant microstructures…
The functionalized ionic liquid 1-(2-hydroxylethyl)-3-methyl imidazolium chloride was found to be a novel and an excellent solvent for microcrystalline cellulose with the dissolubility of (5%)~(7%) at 70 ℃. The regenerated cellulose was obtained from the cellulose solution by coagulating with deionized water and chara…
have been prepared and studied. These hybrid network possess excellent optical transparency and nano scale microphase separation. These hybrid materials can be used for coating aluminum alloy (AA) substrates. Formation of the inorganic phase, from tetraethoxysilane (TEOS) by sol-gel process, organic phase and hybrid n…
Fabrication development of high efficiency quantum well (QW) thermoelectric continues with the P-type B4C/B9C and N-type Si/SiGe films. Si/SiC is being developed to replace Si/SiGe for higher temperature operation. Both isothermal and gradient life testing are underway. One couple has achieved 700 hours at TH of 300°C…
Pitting corrosion and transpassive dissolution of 316 stainless steel in a solution containing five percent of commercial bleaching liquid was investigated by employing potentiodynamic polarization method and recording corrosion potential during immersion. Today commercial bleaching liquids are widely used as a cleane…
Abstract In this article the synthesis, characterization, and surface orientation property of a biodegradable and biomimetic polymer are introduced. This phospholipid mimetic biodegradable polymer is synthesized by combining poly(trimethylene carbonate) (PTMC) with zwitterionic phosphoryl choline (PC) in a three‐step…
A set of surface discharge ageing procedures, space charge observations and dielectric strength measurements has been implemented on a type of insulating nanofilled epoxy-resin (nanostructured by compatibilised synthetic layered silicates) and on its non-filled base resin. Promising improvements in the electrical beha…
Condensation of tetraethoxysilane with silane-functionalized bis(oxazolines) in the presence of dodecylamine leads to hybrid materials whose textural and catalytic properties depend on both the ligand and the spacer structure.
Research results on cathodo-and photoluminescence with time-resolution of Al2O3 nanostructural powders at excitation with strong electron beams as well as synchrotron radiation pulses have been presented. Nanopowders Al2O3 before and after irradiation by Fe+ ions have been found to be characterized by an identical pha…
We report on the formation of high-quality nonalloyed ohmic contacts to n-type ZnO:Al using laser irradiation treatment. The electrical characteristics of the contacts are considerably improved when laser-irradiated. The specific contact resistances are measured to be when the ZnO layers were laser irradiated, which i…
In the present study i-PP/SiO 2 nanocomposites, containing 1, 2.5, 5, 7.5, 10 and 15 wt % SiO 2 nanoparticles, were prepared by melt mixing on a twin-screw co-rotating extruder. Tensile and impact strength were found to increase and to be mainly affected by the content of silica nanoparticles. A maximum was observed,…
It is well known that a thin phase-transformed white layer can be formed on component surfaces produced by hard machining. However, it is not clear as to how the white layer affects component performance, for example, in rolling contact fatigue. This study aims to determine the effects of white layer and associated re…
Abstract Plasma synthesized silicon carbide (SiC) nanoparticles were dispersed in dichloromethane/poly(bisphenol‐A‐carbonate) (PC) solutions by high power ultrasonification. Samples were then prepared by film casting under well adapted preparation conditions. The influence of the SiC nanoparticles on the molecular mob…
Strong correlations between the electronic, structural and magnetic properties have been found during the study of doped double perovskites Sr2Fe1−xMxReO6 (0 ≤ x ≤ 1, M = Zn, Cr). The interplay between the van Hove singularity and the Fermi level plays a crucial role for the magnetic properties. Cr doping of the paren…
Theoretical methods based on density functional theory have been applied to study the differences in exchange coupling between the di-mu-hydroxo and mu-aqua:mu-oxo tautomers of a dinuclear Cu(II) complex. The calculations indicate that the two compounds are totally different from a magnetic point of view. The transfer…
Localized areas of high heat flux on microprocessors are currently being identified as a dominant challenge for the thermal management community. Heat flux values up to 1 kW/cm2 prevailing over a fraction of the overall CPU surface area create local hot spots that need to be cooled. However, thermal solutions designed…
The problem of terminating a transmission line that consists of a set of coupled loop resonators to support the propagation of magneto-inductive waves is considered. Since the ideal terminating impedance is not easily realisable end-reflections are generally obtained from such a line. Techniques are developed to calcu…
Current design concepts for hybrid systems call for the use of presently available turbine systems. Simply stated, the combustor of a turbine system is replaced with a high temperature fuel cell whose excess heat is used to drive the turbine. However, the startup of a turbine in such a direct fired fuel cell turbine h…