Materials Literature
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Studies have been conducted into the characterisation of the behaviour of commercial graphite (brittle) when subjected to hypervelocity impacts by a range of projectiles. The experiments were conducted with a two-stage gas gun capable of launching projectiles of differing density and strength to speeds of about 6kms −…
The recently developed practice of spraying solutions onto a substrate to fabricate thin films via layer-by layer (LBL) method has been further investigated and extended. We successfully fabricated double-layer anti-reflection (AR) thin films with high- and low-refractive-index layers by the spray layer-by-layer (spra…
The propagation velocity and absorption coefficient of ultrasound in the range of 0.6–150 MHz in a series of liquid crystal emulsions prepared on the basis of thermotropic liquid crystals and isotropic liquids were studied. The dispersity parameters of emulsions were controlled by polarization microscopy and dynamic l…
A carbonyl iron/carbon fiber material consisting of carbon fibers grown on micrometer-sized carbonyl iron sphere, was synthesized by chemical vapor deposition using a mixture of C2H2 and H2. The hollow-core carbon fibers (outer diameter: 140 nm and inner diameter: 40 nm) were composed of well-ordered graphene layers w…
The metallurgical observations of microstructure and fracture characteristics of the adiabatic shear bands, within the primary shear zones of the serrated chips produced during high speed machining 30CrNi3MoV hardened high strength steel, have been performed using optical microscope, scanning electron microscopy (SEM)…
Glass and its properties are subject to a variety of changes for many applications. In the last years systematic studies and developments were carried out in the fields of active Nd 3+ (f 3 ), Er 3+ (f 11 ), and Yb 3+ (f 13 ) laser and amplifier glasses. Fluoride and oxide glasses with high intrinsic UV transmission w…
Abstract The formation of a hybridization state of Wannier Mott and Frenkel excitons is theoretically studied for different heterostructure configurations involving quantum dots. At the interfaces of the semiconductor quantum dots and the organic medium, the hybridization states are formed, having complimentary proper…
High performance polyimide (PI) foam has been prepared by esterification method using benzophenone tetracarboxylic acid dianhydride (BTDA) and diamino diphenylmethane (MDA) as the main materials in the mixture of methanol and tetrahydrofuran (THF). The cellular structure, thermal properties and flame retardance proper…
Single-phased and emission-tunable CaLa 2-x Eu x ZnO 5 phosphors were synthesized by citric sol-gel method. Precisely adjusting the activator concentration in CaLa 2 ZnO 5 (CLZ) phosphor, we could obtain blue-green (BG) to orange-red (OR) emissions from the 5 D 2, 1, 0 → 7 F J levels of Eu 3+ with the blue excitation…
In this paper, self-designed electrospinning equipment was used to make a series of electrospinning experiments with materials of polypropylene. The influences of the receiver area, the upper plate area, and the overlapping area between the receiver and the upper plate, on the melt spinning electric field, the spinnin…
Abstract In this paper corundum‐mullite composites were prepared used tabular corundum as coarse clinker, ultra‐fine tabular alumina, fused mullite powder, SiO 2 micro powder and white clay as host material, dextrin as binder. Under the condition of the same content of SiO 2 micro powder and white clay, the effect of…
Nanocomposite polystyrene (PS) foams based on montmorillonite layered silicate (MLS) as nanofillers were prepared using in-situ polymerization of styrene. These nanocomposites were characterized for their thermal and mechanical properties using differential scanning calorimetry (DSC), x-ray diffraction (XRD), dynamic…
Poly(ethylene oxide) (PEO) and blend alkaline metal salts (equal number of cations of lithium perchlorate trihydrate and sodium perchlorate monohydrate) complexations with montmorillonite (MMT) nanoclay filler up to 20 wt% concentration were synthesized by direct melt compounded hot-press technique at temperature 104…
The variation of surface magnetisation, caused by applied stress under the geomagnetic field, can be potentially used to evaluate the degree of fatigue damage for ferromagnetic materials. Under lab conditions, the normal components of surface magnetisation induced by circle tensile-compressive stress are measured in r…
The emergence of the multidrug resistance (MDR) phenomenon in tumor has rendered many currently available chemotherapeutic drugs ineffective. Although many strategies have been explored to overcome MDR, the results have been disappointing to the obstacle. The aim of this study was to investigate whether the new strate…
Body-centered tetragonal C4 (bct C4) is a new form of crystalline sp 3 carbon, which is found to be transparent, dynamically stable at zero pressure and more stable than graphite beyond 18.6 GPa. Symmetry analysis of the vibrational modes of bct C4 at Brillouin zone center is performed, Raman and infrared active modes…
In this study, the epilithic diatoms were investigated monthly to reveal the water quality of Upper Porsuk Creek. The Samples were collected from three stations between December 2004 and August 2005. In this study, a total of 58 diatom taxa were found along the creek. The water quality of Upper Porsuk Creek was determ…
The crystal structure of Li 2 LaTa 2 O 6 N was determined from laboratory X-ray powder diffraction data (Cu K α 1 ) using the Rietveld method. The title compound is tetragonal with space group I 4/ m m m , Z =2, and unit-cell dimensions a =0.395 049(4) nm, c =1.850 97(3) nm, and V =0.288 869(6) nm 3 . The initial stru…
Cancer is one of the leading causes of death worldwide. Deaths from cancer are continuously rising worldwide with a projection of about 12 million deaths from cancer in 2030. Hence, over the past few years, tremendous attention has been given to the cancer related research and there has been an outstanding progress in…
Experimental studies on the inhibitive and adsorption properties of leucine, alanine and glycine for the corrosion of mild steel in H2 SO4 solutions were carried out using weight loss and gasometric methods. The theoretical investigation was carried