Materials Literature
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In this paper three different approaches towards a continuum theory of fiber suspensions are discussed. The first one is the classical Thermodynamics of Irreversible Processes with internal variables. It derives constitutive equations for fiber suspensions on the basis of ONSAGERs phenomenological coefficients, which…
We investigate the scattering process of impulse from impurities in vertical granular chain system under gravity. Most of the studies are focused on the case of light impurities. The reflection rates follow power laws with the impuity depth. There is a valley in the curve of reflection rate versus the initial perturba…
We report a one-step route for the synthesis of Au@TiO 2, Au@ZrO 2, Ag@TiO 2, and Ag@ZrO 2 particles in nanometer dimensions, with controllable shell thickness. This scalable procedure leads to stable and freely dispersible particles, and bulk nanocomposite materials have been made this way. The procedure leads to par…
Structural evolution of polytetrafluoroethylene latex polymer films has been studied by Brillouin light scattering and atomic force microscopy (AFM). Using a tunable sintering process, we have controlled the degree of particle connectivity yielding a crossover in the behavior of acoustic excitations ranging from confi…
Direct determination of chlorine in Zr–2.5Nb alloys down to parts per billion levels has been carried out by use of a glow discharge quadrupole mass spectrometer (GD-QMS). The 35Cl isotope was used for quantification. The relative sensitivity factor (RSF) for chlorine in zirconium matrix (with a 35Cl isotope) was dete…
Connecting two facially-protected porphyrins was expected to lead to an equal mixture of laterally-bridged doubly-protected bis-porphyrins; one in which the two porphyrin units were protected on the same face (syn) and one with the two prophyrin units protected on opposite faces (anti). Addition of a co-factor (bident…
Exchange-spring permanent magnet particles of composition Pr6.93Fe85.7B5.95Nb1.39 in at. % were prepared by spark-erosion in liquid argon. The best exchange-spring properties were achieved after vacuum annealing the as-sparked powders at 700 °C for ∼5 min, and did not change significantly for anneals up to 120 min. Th…
Using surface quasi-elastic light scattering (SLS), we have studied the monolayer behavior of diblock copolymers A−B, where the A block is polystyrene (PS, surface inactive and water insoluble) and the B block is poly(methyl methacrylate) (PMMA, surface active but water insoluble), at the air/water interface (two-dime…
Abstract In a study about silicone contamination on surfaces, crosslinked polydimethylsiloxanes have been examined focusing on the curing process and the noncrosslinked part in the bulk of the material. Curing was studied by following the development of gel as a function of curing time and temperature using Soxhlet ex…
The dynamic version of the continuum theory of dislocations in the form presented by Kosevich is accepted as a starting point for the development of a model of dislocation pattern formation. However, instead of the classical concept of the dislocation density tensor, more refined measures are used for the description…
Optical spectroscopic properties of Tm3+-doped 60TeO2−10GeO2−10K2O−10Li2O−10Nb2O5 glass are reported. The absorption spectra were obtained and radiative parameters were determined using the Judd–Ofelt theory. Characteristics of excited states were studied in two sets of experiments. Excitation at 360 nm originates a r…
New oximate-bridged tetranuclear nickel(II) complexes of compositions {Ni(Dien)}2(μ3-OH)2{Ni2(Moda)4}(ClO4)2·Solv (Solv = H2O, 1a; Solv = 2CH3NO2, 1b; Solv = 2H2O·2C4H8O2, 1c), {Ni(Sdien)}2(μ3-OH)2{Ni2(Moda)4}(ClO4)2·H2O (2), {Ni(Odien)}2(μ3-OH)2{Ni2(Moda)4}(ClO4)2·0.6H2O (3), {Ni(Dien)}2(μ3-OH)2{Ni2(Inaf)4}(ClO4)2·CH…
The flow stress of the wide band-gap semiconductor, 4H-SiC, has been measured by uniaxial compression tests over the temperature range 500–1400 °C at different strain rates. At low strain rates, 4H-SiC shows a transition in the yield stress at a temperature Tc. In addition, the brittle-to-ductile transition (BDT) temp…
The rheological properties of hydrotalcite-like compounds (HTlc)/sodium montmorillonite (MT) suspensions, which have formed gel-like structures, have been investigated. Special emphasis has been placed on the phenomenon of thixotropy. Usually, the structure recovery at rest after steady shear is considered the fundame…
Simple laser irradiation of well-aligned multiwall carbon nanotubes (MWCNTs) was performed to intentionally modify structural defects and to ablate possible contamination of the MWCNTs. Scanning electron microscopy and transmission electron microscopy confirmed the clear presence of the MWCNTs with open tips. A Raman…
A detailed electrochemical study on a series of Eu(III) complexes with multidentate acyclic poly(aminocarboxylate) ligands is reported. For all Eu(III) complexes, a 1e chemically reversible and electrochemically irreversible or quasi-reversible process has been obtained. The electrode kinetics of the 1e reduction of E…
Organosilsesquioxane−titanium oxide hybrids were prepared by nonhydrolytic condensation between CH 3 SiX 3 and 3 / 4 TiY 4 (with X = Cl, Y = O i Pr or X = OR, Y = Cl). The two routes led to hybrids in quantitative yield without formation of Si−O−Ti bonds. The lack of Si−O−Ti bonds may be due to greater rates of homoco…
Abstract The effect of ethylene–propylene–diene terpolymer (EPDM), dicumyl peroxide (DCP), and dimethyl silicone oil on the mechanical properties of high‐density polyethylene (HDPE) composites filled with 60 mesh cryogenically scrap rubber powder (SRP) was studied. The addition of 10 wt % EPDM, 0.2 wt % DCP, and 4 wt…
Abstract Native corn starch‐ and hydroxypropylated starch (HPS‐) based plastic films were prepared using the short pulp fiber as the reinforcement and the glycerol as the plasticizer. Starch (or HPS) films showed different X‐ray diffraction patterns with the A‐type of native corn starch powder. The crystallinity of fi…
Pulsed laser deposition is a unique technique for the deposition of hydrogen-free diamond-like carbon films. During deposition, amorphous carbon is evaporated from a solid target by a high-energy KrF laser, ionized, and ejected as a plasma plume. The plume expands outwards and deposits the target material on a substra…