Materials Literature
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The primary goal of this technology assessment is to provide an initial evaluation and technology screening for the application of a Fuel Cell Energy/Power System (FCEPS) to the propulsion of an Unmanned Underwater Vehicle (UUV). The impetus for this technology assessment is the expectation that an FCEPS has the poten…
Abstract The lanthanide complexes L 2 Ln(NO 3 ) 3 ( 3 ) and L′ 3 [Ln(NO 3 ) 3 ] 2 ( 5 ) (Stewart and Siddall III. J Inorg Nucl Chem 1971, 33, 2965–2970) were obtained, where L is the tetraethyl ester of ethylenediphosphonic acid ( 2 ), L′ is the tetraisopropyl ester of ethylenediphosphonic acid ( 4 ), and Ln is La, Ce…
Cerium dioxide films were deposited on silicon substrates by chemical vapor deposition using tetrakis (3-methyl-3-pentoxy) cerium. The deposited films were found to have a columnar structure when viewed cross-sectionally with the scanning electron microscope. The lateral variation of the film thickness was measured by…
The identification of a Rh-oxidised species of a Rh(0.29)/Ce0.68Zr0.32O2 catalyst that exhibits peculiar CO-O2 kinetics [I. Manuel, J. Chaubet, C. Thomas, H. Colas, N. Matthess and G. Djéga-Mariadassou, J. Catal. 2004, 224, 269] is addressed. For this purpose, various catalysts are studied by XANES, CO- and N2-FTIR, a…
The adsorption of boron on alumina (Al2O3) and magnesia (MgO) has been investigated in aqueous solutions as a function of pH, boron concentration, amount of adsorbent, ionic strength and temperature. Analysis of the experimental data indicates that under the optimum pH conditions, the adsorption mechanism depends on t…
The aim of present paper is the investigation of relationship between inhomogeneous deformation behavior and macroscopic deformation behavior arising in SMA during cyclic loadings. Firstly, a test system was constructed on the basis of Digital Image Correlation in order to measure inhomogeneous deformation behavior. S…
Flax fibres are oftenly used for reinforcing thermoplastic to manufacture biocomposite materials exhibiting numerous advantages such as high mechanical properties, low density and biodegradability. The mechanical properties of a biocomposite material depends on the nature and orientation of the fibres, the nature of t…
We have used mixed monolayer protected gold clusters (MMPCs) to provide flavoenzyme model systems with a high affinity and ability to modulate cofactor reduction potential.
The discovery of infrared radiation two centuries ago and the theory of blackbody radiation one century later have given birth to the field of thermal imaging. Since then, researchers have devised numerous ways to detect infrared radiation. From World War II to the 1980s, semiconductor-based cooled photon detector arr…
The specific features of thermal degradation and combustion of polypropylene nanocomposites based on organically modified layered aluminosilicate were studied. On the basis of thermogravimetric analysis data, a kinetic model that takes into account the diffusive character of the thermal degradation process for the PP…
The role of in the luminescence of several activated borate phosphors was examined. The results showed that under excitation, the photoluminescence of was improved with the incorporation of in the systems of and , while in the case of and , the luminescence of was decreased when was introduced into the host lattice. A…
Polymethylsilane (PMS) modified with titanium chloride (TiCl4) or molybdenum chloride (MoCl5) was pyrolyzed at various temperatures to enable a detailed investigation of stable phases formed during pyrolysis. The existence of TiSi2 in PMS-TiCl4 precursor and β-MoSi2 in the PMS-MoCl5 precursor below 1273 K suggested a…
Abstract The evaporation kinetics of pure Romascone® (methyl 2,2‐dimethyl‐6‐methylene‐1‐cyclohexanecarboxylate) and Romascone® when mixed with vinyl acetate (VAc) nanoparticles have been determined by using thermogravimetric analysis. For pure Romascone®, the evaporation rate follows an Arrhenius dependence with tempe…
By using a duplex-coated carbon fiber felt, copper welding to aluminum is successfully developed. The first step of the welding method is that the felt is contacted and wrapped with molten aluminum, which is solidified under gravity pressure. The second step is that the aluminum-welded felt is contacted and wrapped wi…
Growth of KDP crystals from aqueous solutions with SiO 2 particles whose size ranges from 10 –2 to 400 μm in the static and dynamic modes has been studied. The effect of mother-solution supersaturation and particle size and concentration on the process of particle capture by a growing crystal is considered as well as…
Covers advancements in spacecraft and tactical and strategic missile systems, including subsystem design and application, mission design and analysis, materials and structures, developments in space sciences, space processing and manufacturing, space operations, and applications of space technologies to other fields.
Key thermophysical and mechanical properties of a three‐dimensional Hi‐Nicalon™/silicon carbide (SiC) composite were tested. The relationship between the thermal expansion coefficient and temperature of the composite from room temperature (RT) to 1400°C was similar to that of chemical vapor deposition SiC. The thermal…
A porous anodic aluminum oxide (AAO) template was fabricated selectively on a patterned substrate from a sputter-deposited Al film. The pattern size was varied from 2 to with a depth of . The overall surface undulation of Al resulting from the underlying patterns was planarized by chemical mechanical polishing. During…
The N-acylsulfathiazole deriviatives 2, 3 and 4, the polymeric N-acylsulfathiazole 6 and the phenolic sulfathiazole analogue 7 were prepared and were found to promote crystallization of form I sulfathiazole from water with inhibition of forms II, III and IV; suggesting that the mode of action of the additives may invo…
A deuterium two-dimensional exchange NMR technique is used to study the chiral smectic C (SmC*) and chiral subphases (SmC*(Fi1), SmC*(Fi2)) of a smectogen (s)-1-methylheptyl 4'-(4-n-decyloxy-benzoyloxy)biphenyl-4-carboxylate (10B1M7). The aim is to demonstrate how this technique can be combined with sample rotation in…