Materials Literature
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There have been incidents recently where cracking has been observed in the bi-metallic welds that join the hot leg to the reactor pressure vessel nozzle. The hot leg pipes are typically large diameter, thick wall pipes. Typically, an inconel weld metal is used to join the ferritic pressure vessel steel to the stainles…
Lanthanide complexes of Schiff bases (SBs) with 1:1 and 1:2 (M:Lig) stoichiometric ratios were prepared by condensation of pyridoxal (PL) and aspartic acid (Asp) or l-histidine (His), respectively, in the presence of the appropriate metal chloride as a templating agent. These complexes were studied by optical spectros…
Bimodal porous carbons consisting of interconnected macropores and spherical mesopores, were prepared by colloidal crystal templating method. The template was prepared by evaporation process of suspensions containing monodisperse poly[styrene-(co-2-hydroxyethyl methacrylate)] (PSHEMA) latex and colloidal silica in wat…
This article presents the analysis of the survivability of a heavy transport helicopter tail rotor blade made of composite laminated materials after ballistic damage made by the bullet of 7.9-mm calibre shoulder weapons. Penetrating damages made in the root part of the tail rotor blade spar have been analysed. The tes…
The sol-gel method was applied to create Al2O3-Cr2O3 ceramics using aluminum ethylacetoacetate diisopropylate and chromium (III) chloride hexahydrate as starting materials. In the calcination at 600-1200°C it was found that the grains of Cr2O3-rich solid solution grew when they were exposed to the surrounding Al2O3-ri…
In this letter, we describe the fabrication of a durable photoalignment layer for liquid crystals (LC) with high azimuthal anchoring and controllability of the tilt angle. A film is irradiated using linearly polarized ultraviolet (LPUV) light followed by annealing which induces the molecular orientation of the photoal…
Thermomechanical and shape memory behavior on thermo plastic segmented polyurethane (SPU) copolymers based on polytetramethylene glycol (number average molecular weight, M n = 2900 g mol 1 ), 1,4-butane diol, 4,4′-diphenylmethane diisocyanate (MDI), and with/without polyethylene glycol (PEG) (number average molecular…
In solid oxide fuel cells, the preferred anode electrode is a cermet of Ni-yttria-stabilized zirconia. When high carbon activity ( a c 1 ) and low oxygen partial pressure ( p O 2 ) environments are encountered in the anode compartment, carbon deposition occurs in concert with a corrosion reaction known as metal dustin…
SUMMARIES Five different dispersions of Ca(OH) 2 or Mg(OH) 2 nanoparticles in alcohols were applied as deacidification to both lignocellulosic and purely cellulosic paper samples. Artificial ageing tests at constant elevated temperature (90°C) and relative humidity fluctuating between 40% and 60% every 24 hours were p…
Cathode Performance of Nanostructured La1 − a Sr a Co1 − b Fe b O3 − x on a Ce0.8Sm0.2O2 Electrolyte Prepared by Citrate-Nitrate Autocombustion, Deganello, Francesca, Esposito, Vincenzo, Miyayama, Masaru, Traversa, Enrico
The moisture transmission behaviour of a clothing assembly plays a very important role in influencing its efficiency with respect to thermophysiological body comfort. This paper is in two parts. Part I deals with the processes involved in moisture transmission and the factors at play. Part II is concerned with selecti…
The aim of the research was to characterize chitin and chitosan from byproduct of meat crab’s Cirebon canning industry. The preliminary research included chitin flour production. Later on, production and characterization of chitin and chitosan. Characteristics of chitin and chitosan included solubility, degree of deac…
A designed compositional series of 22 devitrifiable glasses for sealing solid oxide fuel cell components was studied.Candidate oxides were selected on the basis of chemical compatibility with the fuel cell environment.The influence of each component on viscosity, thermal expansion, and crystallization were evaluated t…
An expression for the temperature dependence of the viscosity and fragility is derived based on a simple model of the melt. According to the model, the fragility is determined by the relaxation of structural units that form the melt, and is described in terms of the bond strength, coordination number, and their fluctu…
Poly(styrene)--poly(2-vinyl pyridine)--poly(styrene) (PS--P2VP--PS) triblock copolymers were synthesised by anionic polymerisation. Thick films were cast from solution and their structure analysed by small angle X-ray scattering (SAXS). Longer annealing times led to more ordered structures whereas short evaporation ti…
Single-wall carbon nanotubes (SWNT) prepared by the "super growth" method developed recently exhibit electron paramagnetic resonance (EPR) signals, which can be attributed to itinerant spins. EPR results indicate very low defect and catalyst concentrations in this superior material. Under these conditions EPR can be u…
As a more effective in vivo drug delivery system, several methods loading anti-cancer drugs to biodegradable and biocompatible nano-particles have been explored and developed. Supposedly due to the enhanced permeability and retention (EPR) effect, systemic administration of these nano-particles have been found to resu…
Scanning Kelvin probe (SKP) potentiometry was used to systematically investigate the effect of surface abrasion and subsequent heat-treatment on the open-circuit potential (OCP) of AA6016 in humid air. SKP is also used to follow the kinetics of filiform corrosion (FFC) and to determine characteristic potentials associ…
A novel porphyrin–cyclodextrin conjugate, 5[4-(6-O-β-cyclodextrin)-phenyl],10,15,20-tri(4-hydroxyphenyl)-porphyrin (CD-THPP), has been synthesized in good yield (30%) starting from 6-O-tosyl-β-cyclodextrin using 5,10,15,20-tetra(4-hydroxyphenyl)porphyrin (p-THPP) as a nucleophile. The spectroscopic properties of CD-TH…
A new class of materials, metamaterials, whose properties are engineered by controlling their nanostructure, open new vistas in optics and offer the possibility of lenses that can resolve details finer than the wavelength of light.