Materials Literature
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Abstract Two rare metal coordination complexes of yttrium(III) including 1,10‐phenanthroline, Y(phen)2(NO3)3 and (phenH)2[Y2(pydc)3(NO3)2·6H2O] (phen=1,10‐phenanthroline, pydc=2,6‐pyridinedicarboxylate), and a proton transfer compound (phenH+)2(pydc2−) were synthesized and characterized by elemental analysis, molar co…
Instrumented indentation tests were conducted on a pure nickel and a Ni-10Pd solid solution at 450 °C with loading rates varying from 62.5 to 1000 mN/s. The load–depth curves from the pure nickel exhibited a smooth and continuous transition; while the load–depth curves from the Ni-10Pd were initially smooth and then b…
Transcatheter valve replacement using bioprosthetics is a common procedure, however limited due to graft durability. The aim of this study was to verify the mechanical durability of tissue engineered constructs to crimping necessary for transcatheter deployment. Polyurethane patches were seeded with human vascular cel…
Abstract We derive expressions for the bond polarizability (BP) parameters involving only directly measurable quantities, such as dielectric and elasto‐optic constants of the bulk crystal and apply them to zincblende‐type crystals. The vibrational modes are calculated on the basis of an eleven (11) parameter rigid‐ion…
The aim of this study was to understand the stick-slip properties of para-aramid woven fabrics. For this reasons, pull-out test was conducted on para-aramid Kevlar® 29 and Kevlar® 129 woven fabrics. The force–displacement curve from each fabric sample was obtained. The stick-slip region and accumulative retraction for…
A general solution for the stress and strain fields in a three-layer composite tube subjected to internal and external pressures and temperature changes is first derived using thermo-elasticity. The material in each layer is treated as orthotropic, and the composite tube is regarded to be in a generalized plane strain…
Abstract Ni53Mn23.8Ga23.2 ribbons were fabricated by melt‐spinning and subsequent high vacuum annealing process. The structure and magnetic properties of the as‐spun and annealed ribbons were investigated by X‐ray diffraction (XRD), scanning electron microscopy (SEM), differential scanning calorimeter (DSC), and vibra…
Lattice vibrations from 20 K to room temperature in lithium alanates LiAlH4 and Li3AlH6, which decompose to release hydrogen over 423 K, were investigated by neutron spectroscopy. For both alanates, the overall spectra already start to broaden at 100–150 K with increasing temperature. The spectral lines assigned to th…
We calculate the dynamical dielectric function of doped double-layer graphene (DLG), made of two parallel graphene monolayers with carrier densities \(n_1, n_2\), respectively, and a separation interlayer of \(d\) at finite temperature. The results are used to find the dispersion of plasmon modes. We study the tempera…
Abstract A practical method is developed to determine the strain dependence of the pseudospin–pseudospin interaction parameters in discrete models of the continuous order–disorder improper ferroelastic phase transitions from experimental data on the primary order parameter (polarisation). The temperature dependence of…
Abstract For the study of thermoelectric materials, it is important to determine the carrier‐scattering mechanisms. For this study, we investigated the carrier‐scattering mechanism in doped lead telluride (PbTe) by analyzing the electrical properties and the Nernst coefficient: ANe. The sign of the Nernst coefficient…
Several lithium‐disilicate ( Li 2 O∙2SiO 2 ) glass samples were synthesized, polished and subjected to static leach tests for varying periods of time in an HCl solution (pH 4) at 90°C. The presence of an alteration layer on the leached specimens was independently confirmed using infrared spectroscopy. These samples we…
We have performed a detailed density functional theory study on the structural and electronic properties of Na(n)C(60)(-) (n = 1-12) clusters. The calculated vertical detachment energies show good agreement with the experimental data, which confirms the 3p (n = 3p) oscillation rule. The oscillation can be attributed t…
Abstract Poly(ethylene terephthalate) (PET) is a widely used resin in the production of carbonated soft drink (CSD) bottles produced by injection‐stretch blow molding. A reduction in the bottle weight brings down the cost of packaging by reducing the materials and manufacturing costs. This article presents an integrat…
Diffraction methods are used to detect atomic order in solids. While uniquely ergodic systems with pure point diffraction have zero entropy, the relation between diffraction and entropy is not as straightforward in general. In particular, there exist families of homometric systems, which are systems sharing the same d…
Monocrystalline cadmium fluoride is a dielectric solid that can be converted into a semiconductor by doping with donor impurities and subsequent heating in the reduction atmosphere. For two donor elements, Ga and In, the donor ("shallow") state is a metastable one separated from the ground ("deep") state by a barrier.…
In-situ identification of metastable phases formed from the undercooled LuFeO3 melt under controlled oxygen partial pressure Po2 was studied by x-ray diffraction measurements at a synchrotron radiation source. Real-time observation of the formation and growth of individual phases during the single recalescence of Lu3F…
The forensic examination and dating of documents is important in our society, because documents are used throughout our lives to record everything we do. The analysis of questioned documents therefore involves different types of analysis including comparison of the handwriting, ink, typescript or print, as well as phy…
Using dissipative particle dynamics, we investigated the graft configuration-dependent scroll formation of sheet polymers and their morphologies. Two types of coarse-grained graft disorder models were considered at various displaced tether fractions. Although tether coils were identical, sheet anisotropy arose from di…
Abstract Polyurethane (PUR) rigid foams were prepared from recycled aircraft deicing agent (aircraft deicing fluid) with reaction of hexamethylene diisocyanate at temperature of 55°C. The effect of [NCO]/[OH] ratio on properties of microscopic structure, cell size distribution, compressive strength, apparent density,…