Materials Literature
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The microstructure of a 2D woven ceramic matrix composite displays significant variability and irregularity. For example, a chemical vapor infiltrated (CVI) SiC/SiC composite exhibits significant amount of porosity arranged in irregular patterns. Furthermore, the fiber tows within a ply frequently have irregular shape…
The dynamic surface wetting kinetics of sessile water and ethylene glycol droplets deposited on ink-jet papers was studied. The hydrodynamic and molecular-kinetic models were used for data analysis and the results were compared with each other. Hoffman–Tanner plots gave good linear fits with experimental data, but onl…
The influence of silica nanoparticles on the elasticity of a polymethylmethacrylate (PMMA) melt was investigated. The extrudate swell obtained from the extrusion of the melt through a die and the recoverable deformation after a creep test were measured. As well known from other materials, the extrudate swell becomes s…
Relying on combined electron-beam lithography and lift-off methods Au/Ti bilayer electrical contacts were attached to individual ZnO nanowires (NWs) that were grown by a vapor phase deposition method. Reliable Schottky-type as well as ohmic contacts were obtained depending on whether or not an ion milling process was…
Technical grade crosslinked polyethylene (XLPE) cable’s insulations were subjected to heat cycling in the presence of electric stress and aqueous ionic solutions composed of NaCl, Cu(NO3)2 and CuSO4. The results show a large water tree propensity index due to the sulphates. To evaluate contribution of cationic and ani…
Breakdown phenomena are investigated at continuous isothermal (20 ∘ C) and galvanostatic (0.2–5 mA cm −2 ) anodizing of aluminum in ammonium salicylate in dimethylformamide (1 M AS/DMF) electrolyte. From the kinetic U t ( t )‐curves, the breakdown voltage ( U B ) values are estimated, as well as the frequency and ampl…
Using TEM observation and Vickers micro-hardness measurements, this study investigated microstructural changes resulting from aging treatment of ultrafine-grained (UFG) Al-0.5%Si alloy fabricated with a six-cycle accumulative roll-bonding (ARB) process, which includes severe plastic deformation. Results show that the…
In the last two decades, 5-fluorouracil (5-FU) is widely used in clinical practice to inhibit the fibroblasts to proliferate and improve the success rate of glaucoma-filtering surgery, but 5-FU has many toxic effects to normal ocular tissues. The self-assembled peptide hydrogels may serve as a new class of biomaterial…
Discontinuous precipitates (DPs) have a random distribution at grain boundaries in commercial AZ91 Mg alloy, whereas continuous precipitates exist in the matrix. Previous studies have mainly focused on continuous precipitates and their orientation relationship with the matrix. In this study, thin cross sections of DPs…
In this research, CaCu3.1Ti4O12.1: CC(3.1)TO ceramics were prepared by a simple solid state mixed oxide method. The optimum temperature for calcination the formation of phase pure perovskite and lattice parameters “a” of unit cell close to lattice parameter in the basis JCPDS file was found about 900°C for 8 h. Phase…
A novel, green method for hydrogen (H2) production was studied; the method involves the mechanical mixing of aluminum (Al) with water (H2O). We examined the use of glass and stainless steel reactors. When the glass reactor was used, the induction period of the reaction of Al with H2O was long. The induction period dec…
Single crystals of m-Nitroacetanilide (mNAa) were successfully grown by slow evaporation method at a constant temperature 40°C from methanol solution. The solubility studies for mNAa were estimated. The cell dimensions were obtained by single crystal X-ray diffraction (XRD) study. The functional groups have been confi…
A hierarchical structure of poly(ethylene oxide)-b-poly(ε-caprolactone) (PEO-b-PCL) block copolymer (BCP) confined between crosslinked resin was patterned into Bragg volume gratings using a holographic polymerization (HP) process. The BCP formed a lamellar structure confined between the layers of the grating created b…
The synthesis and characterization of oligoaniline-containing dendron-rod-dendron dumbbell shape block oligomer (14G3A7) are presented. The unusual surface morphological evolution from fibrils to flat single-layer film and to a porous network is observed for 14G3A7 simply by oxidizing the block oligomer in solution. B…
Dynamical structures of intrinsically disordered proteins (IDPs) and multi-domain proteins that include large ID regions between the domains are unable to be determined by such conventional methods as X-ray crystallography and electron microscopy. Small-angle X-ray scattering (SAXS) is suitable to determine low-resolu…
Abstract The host–guest complexation between bisporphyrin cleft 1 and flat aromatic guest 2 was controlled by an electrochemical reaction. The first oxidation potentials of 1 showed the anodic shift upon the addition of 2 . On the basis of the square scheme, the association constant of 1 with 2 was estimated to be at…
A series of glass sealants for solid oxide fuel cell (SOFC) with compositions SrO (x wt %) La2O3 (15 wt %) Al2O3 (15 wt %) B2O3 (40-x wt %) SiO2 (30 wt %) [x = 10, 15, 20, 25 & 30] [SLABS] have been investigated by quantitative Fourier Transform Infrared Spectroscopy (FTIR). Structural findings from FTIR reveal that w…
We report the synthesis of oriented single crystalline Mn doped ZnO nanowires through a hydrothermal method. Structural characterizations using X-ray diffraction and transmission electron microscopy revealed that the Mn was doped into the lattice structure, forming solid solution. The Mn doped ZnO nanowires possess wu…
The structure and properties of porous silicon produced applying vapour phase chemical etching of Si in the mixture of HF/HNO3 acids are analysed. Experimental layers of different porosity with pores of different sizes and shapes corresponding to different active surface areas were formed by varying the etching parame…
A specialized module VAPEX‐M has been developed and implemented as a part of an integral code, SOCRAT, to enable the modeling of fuel‐coolant interactions (FCIs) during severe accidents. The mathematical model and correlations for the main physical processes are described. Results of computational analysis of three ex…