Materials Literature
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A series of intimately intermingled mixed metal oxide nanoparticles were prepared via a modified aerogel procedure (MAP). These mixed oxides were composed of alkaline earth oxides and aluminas. It was found that the surface area and reactivity of these materials decreased on going from magnesium to barium in these int…
A fabric bending model that includes contributions from nonlinear elasticity, and viscous and Coulomb friction with hysteretic effects is presented. The model allows the recovery of the loading, unloading and hysteresis behaviors observed in the Kawabata evaluation system (KES) bending tests and provides the ability t…
4,4[prime or minute]-Methylenebis(N-salicylidene-2,6-dialkylaniline) derivatives were prepared and their structures were determined by (1)H NMR, IR, DSC and X-ray crystallographic analyses. The 2,6-diisopropylaniline derivative yielded definite polymorphic crystals: the space groups of the crystals were C2/c and P2(1)…
Ti−Hf alloys are expected to have lower modulus and higher strength than pure Ti since. Hf has been suggested to have the potential to enhance the strength and to reduce the Young's modulus of Ti alloys at the same time. In the present study, binary Ti−Hf alloys with Hf contents from 5 to 40 mass% were designed and fa…
The interphase of quiescent and sheared isotactic polypropylene–liquid crystalline polymer (iPP–LCP) fiber model composites has been examined with synchrotron infrared microscopy down to a lateral spatial resolution of 3 µm. By using the polarization of the beam, it is possible to distinguish between α and β transcrys…
Research Article| July 01, 2004 Assessing subglacial processes from diatom fragmentation patterns Reed P. Scherer; Reed P. Scherer 1Geology and Environmental Geosciences, Northern Illinois University, DeKalb, Illinois 60115, USA Search for other works by this author on: GSW Google Scholar Charlotte M. Sjunneskog; Char…
As a function of asymmetry, binary mixtures show a phase behaviour transition from type II to type III through an intermediate type IV phase behaviour, according to the Scott and van Konynenburg classification. However, the intermediate type IV phase behaviour, related to this transition, is actually associated to two…
New trialkoxysilyl group-containing copolymers for humidity-sensitive polyelectrolytes were prepared by copolymerization of [2-(methacryloyloxy)ethyl]trimethyl ammonium chloride (METAC), 3-(trimethoxysilyl)propyl methacrylate (TSPM) and 2-ethylhexyl acrylate (2-EHA). They were self-crosslinkable copolymers composed of…
Abstract Photoconductivity measurements are carried out in this work for single crystals of Tl 4 S 3 compound by using both pulsed excitation (a.c) and steady state (a.c) methods in order to elucidate the nature of photoconductivity (PC) in this compound. Results are reported in the temperature range from 77 to 300 K,…
The exposure test results of natural contaminants accumulated on the surfaces of cap, pin and post insulators at three testing stations in northern China's inland areas are summarized. The contaminants growth rapidly from the end of autumn to next early spring, and heavy rain in summer can wash away a lot of contamina…
[Cu(4)L(2)(bpy)(4)(H(2)O)(3)](ClO(4))(4).2.5H(2)O, 1, a new tetranuclear Cu(II) cluster showing square planar geometry, formed with aspartate bridging ligand (L) has been synthesized. The global magnetic coupling is ferromagnetic but theoretical DFT/B3LYP calculations are necessary to assign which Cu-L-Cu side is ferr…
Abstract The reversible trans–cis photoisomerization of azobenzene and azopyridine chromophore was used to design and exploit novel photoactive materials based on polymers and liquid crystals. This paper reviews our recent studies on several systems. These include azobenzene-containing thermoplastic elastomers that ca…
The aim of this research is to demonstrate the effect of variations in certain parameters of the oily phase (OP) in water-in-oil (W/O) emulsions on rheological and texture properties of finished products. The formulated emulsions were selected according to an optimal experimental procedure. The applied variations were…
The multidirectional asymmetrical microlens-array light-control film (MAMA-LCF) is developed for enhancing the image brightness and contrast ratio of various reflective liquid-crystal displays. By use of index-matching material, the interface reflection is greatly reduced. Through optimized designs, the surface-scatte…
Crystalline materials obtained by reacting titanium(IV) isopropoxide (1) with widely different ligands such as 1,3-propanediol, 2,2′-biphenol or triphenylacetic acid using acetone as a solvent have been characterised using single-crystal X-ray diffraction, 1H, 13C and 17O NMR spectroscopies and theoretical modelling.…
Vane subelements were fabricated from a silicon carbide fiber reinforced silicon carbide matrix (SiC/SiC) composite and were coated with an environmental barrier coating (EBC). A test configuration for the vanes in a gas turbine environment was designed and fabricated. Prior to testing, finite element analyses were pe…
Tribological attributes of post-chemical mechanical planarization (CMP) brush scrubbing are investigated as a function of tool kinematics, applied pressure, pH, and flow rate of the cleaning solution. Coefficient of friction (COF) results show that at high pressures, for low and neutral pH, the lubrication mechanism i…
Laser beam welding with the aid of metal powder additions to the weld pool was carried out to modify the ferrite/austenite (α/γ) ratio of the weld metal of 2205 duplex stainless steel (DSS). The α content in the weld metal of DSS welds could be controlled by the proper flow rate of nickel powder through a coaxial nozz…
A simple and economic process for the preparation of mesoporous SiC ceramics with high BET surface area was developed by using commercially available sources. Low viscosity polycarbosilane as a SiC precursor was infiltrated into a sacrificial silica sphere template, which was precipitated by the centrifugation of an a…
Extruded Mg-6 mass%Al-1 mass%Zn (AZ61) alloy was grain-refined utilizing Equal Channel Angular Extrusion (ECAE) processing. Initially, the extruded bar of the alloy was ECAE-processed 2-times at 473 K. Subsequently, it was processed 4-times at 448 K. As a result, the grains are refined to less than 1 μm and a large am…